Home

Avaya Configuring DLSw Services User's Manual

1. CHE 3174 l 7 Host Mee secondary Ii 3174 uter m SDLC oS IP SL e A mm ZO 5 backbone C SI 3174 m Front end processer EC 3L E l i 3174 SDLC TCP IP or LLC2 LLC2 4 gt 4 p lt DLS0024A Figure 1 9 Secondary SDLC Routers in a Single and b Dual Switch DLSw Networks 1 20 303523 A Rev 00 Data Link Switching Overview Combining Primary and Secondary SDLC Using primary and secondary SDLC services a network can transport existing SDLC traffic over a router based topology that Enables existing SDLC traffic to use a high speed multiprotocol backbone network e Simplifies the migration to a router based network by incorporating SDLC traffic into the multiprotocol backbone without converting the existing endstations e Locally acknowledges the SDLC protocol at each side of the router based network eliminating polling and acknowledgment traffic from the network backbone e Allows high speed links into the SNA host improving response time Figure 1 10 illustrates primary and secondary SDLC using single and dual switch services
2. SDLC Host secondary m E E o NoN Z SS F Backbone m Front end SDLC processer E primary E Z G 3174 SDLC secondary 5394 AS 400 LS0025A Figure 1 10 Combining Primary and Secondary SDLC 303523 A Rev 00 1 21 Configuring DLSw Services Frame Relay Support Figure 1 11 illustrates the connection of a host through a Frame Relay network in a configuration with multiprotocol traffic to other locations Client Figure 1 11 Single switch DLSw Host Frame Relay network DLSw Bay Networks router TCP IP Client Bay Networks router Token Ring Sample Frame Relay Network DLS0007A 1 22 303523 A Rev 00 Data Link Switching Overview Bay Networks provides two ways to communicate directly with an SNA processor such as an IBM 3745 or AS 400 over Frame Relay e Boundary Network Node BNN e Boundary Access Node BAN Boundary Network Node RFC 1490 BNN refers to RFC 1490 Routed SNA over Frame Relay This implementation of LLC2 also complies with the Frame Relay Forum 3 FRF 3 Multiple Protocol Encapsulation over Frame Relay Implementation A
3. DLSw dual switch services uses TCP IP between routers unlike adjacent single switch routers using LLC2 DLSw dual switch services provide e IP routing permitting delivery over any available path TCP services providing reliable data delivery reduced network overhead and flow control mechanisms to manage traffic Packets are carried to an attached Bay Networks DLSw node where the data is translated into SSP datagrams The data is then routed over the multiprotocol backbone to a remote Bay Networks DLSw node using an IP routing protocol When the SSP datagram reaches the remote Bay Networks DLSw node it is translated into the appropriate frame and carried to its destination Figure 1 7 shows how SNA devices use DLSw dual switch services to communicate over TCP IP This differs from adjacent single switch operation which uses LLC2 on the backbone NetBIOS server SNA Token Ring processor i LLC2 ELL LL TCP IP network Bay Networks router 4 LLC2 gt lt IP gt 4 LLC2 or SDLC gt a a a Mb gt Logical connection DLS0004A Figure 1 7 DLSw Dual Switch Services for SNA Devices on LANs 1 16 303523 A Rev 00 Data Link Switching Overview SDLC Support Integrated SDLC support merges the SDLC traffic with the multiprotocol traffic of LANs into a single network backbon
4. log Table C 3 DLSw State Table State Name State Number CONNECTED 1 CONNECT PENDING 2 CONTACT PENDING 3 CIRCUIT ESTABLISHED 4 CIRCUIT PENDING 5 CIRCUIT RESTART 6 HALT PENDING 7 DISCONNECTED 11 DISCONNECT PENDING 12 RESTART PENDING 13 RESOLVE PENDING 14 CIRCUIT START 15 HALT PENDING NO ACK 16 Table C 4 DLSw Event Table Event Event Number in decimal CANUREACH Received 3 ICANREACH Received 4 REACH_ACK Received 5 XIDFRAME Received 7 CONTACT Received 8 303523 A Rev 00 Troubleshooting DLSw Table C 4 DLSw Event Table continued Event Event Number in decimal CONTACTED Received 9 INFOFRAME Received 10 HALT DL Received 14 DL HALTED Received 15 RESTART DL Received 16 DL RESTARTED Received 17 NETBIOS NQ NETBIOS NQ ex 18 NETBIOS NQ cs Received NETBIOS NR NETBIOS NR ex 19 NETBIOS NR cs Received DATAFRAME Received 20 HALT DL NOACK Received 25 NETBIOS ANQ Received 26 NETBIOS ANR Received 27 KEEPALIVE Received 29 CAP EXCHANGE Received 32 IFCM Received 33 TEST CIRCUIT REQ Received 122 TEST CIRCUIT RSP Received 123 Sample Log Entries This section describes some common sample DLSw event entries that may appear in the log file The event code in the Bay Networks log is an internal number that identifies the specific message A description follows each message 303523 A Rev 00
5. Logical connection DLS0003A Figure 1 8 Primary SDLC Routers in Single Switch DLSw Networks 1 18 303523 A Rev 00 Data Link Switching Overview Secondary SDLC Support A Bay Networks router acting as a secondary device on an SDLC link can e Support a single or multiple SDLC link communicating to an FEP or other SNA host e Allow SNA devices attached to multiple remote routers to share a single SDLC link to the FEP e Attach to the FEP directly using a null modem cable or via a leased line Figure 1 9 illustrates DLSw single and dual switch networks where Bay Networks routers serve as secondary SDLC nodes 303523 A Rev 00 1 19 Configuring DLSw Services a Single switch DLSw network SDLC secondary routers E J H 1 3174 Host pd l i fe m CN mm 7 SDLC EH 3174 ll 3174 Front end processer i E Loy li 8174 SDLC LLC2 oss sb ete ple 25 22 eee b Dual switch DLSw network
6. 3274 Router B Router A D dL CJ min EA Z a NetBIOS server PC DLS0031A Figure 3 1 DLSw Single Switch Network Example 3 2 303523 A Rev 00 DLSw Configuration Overview Single Switch Configuration Requirements To configure single switch DLSw services on the router you define e DLSw basic global parameters e DLSw advanced global parameters optional e DLSw SAP Table entries optional DLSw Basic Global Parameters In single switch configurations DLSw requires that you specify a value for the DLSw Virtual Ring ID parameter Optionally you can change all other parameters that appear in the DLSw Basic Global Parameters window DLSw Virtual Ring ID The IP Virtual Ring parameter specifies a standard ring number 0x001 through OxFFE that SRB uses to identify traffic that DLSw places on the SRB LAN This ring number is the first entry in the packet s routing information field RIF The ring number must be unique within the network Generally Bay Networks routers should use the same value For this parameter Bay Networks recommends the value OxFFD if it is available DLSw RFC Version The DLSw RFC Version parameter lets you specify the RFC implementation you want to run on the router RFC 1434 RFC 1795 DLSw Version 2 0 Unicast or RFC 2166 Multicast NetBIOS Support The NetBIOS parameter lets you specify wheth
7. 1 29 Proloco PRESE eaaet oU EAE E 1 30 Far Mare Information About DLW siccceisascudeeidessnnnetasaieberidedaeunpeligseuberinasiadeeiadaienancasians LOU Chapter 2 DLSw Implementation Notes DLSw and Other Subsystems ceo es sintenesciuccaseribauleaeeiniiea tha UL XA MUR es UR RE m CU Ru VEA ERU Ede 2 1 OMmbining DLW E amd ORE d 2 2 Flur e 2 4 gie and SRE Ol a CMOUE eese RU EU 25 DLSw and Bridging SOIVIGalk uusispasaasiuiartvazsubant pascua esai aE Leda eaii 2 6 DLow on an Ethernet e022 CPGE asuisin iooni ineine ae RUE ao cR A Ret AREE un 2 6 DLSw with Teanslation Bdge uso sessccco eid bnac ee tu on te rei t pep Qr bI Eve MBA Que LEM IR T QURE aU RUE 2 7 Using DLSw Independently of the daneben ij qe C 2 8 Parallel Bridge and DLSw PAIS uista cer cvsbdebutk rata sHU den a e URMD UR ac qeu ENEA 2 9 Multiple DLSw Peers on a LAM 2a e tomes a pase dv deba das 2 10 upra E und iaaneeedam hedaserean te aS 2 10 TOF ees cS ERE E EO OLEUM 2 11 gs cEPDDIMC e 2 11 LEOZ FON CO Ol e TT 2 11 TOP FEON OOM bem ETE HE A EA YQ xul Mee 2 12 RIBUS MEER I TI dt ceceenb slecciubuseansiam 2 13 vi 303523 A Rev 00 giis Boi tard tbs iia Meee meena net eer pet cere Ter tery rt recent o mcr ee Ets sory ene Cor Z nt rn rorrere 2 13 Bei PSS unrin ERE 2 14 Chapter 3 DLSw Configuration Overview Adding Single Switeh
8. 303523 A Rev 00 Troubleshooting DLSw The host computer generates an SABME frame and sends it to Router A Router A returns UA and receiver not ready RNR frames back to the host Router A then contacts Router B and Router B sends the SABME contact frame to the terminal 12 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 45 SSP contact frame rcvd in LLC conn state flag 30927f70 4 201 The terminal returns an acknowledgment UA packet to Router B Router B informs Router A that the contact is accepted A state change occurs 13 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 16 State change in ssp contact conn 30927f70 old state 4 new state 3 Router sends an acknowledgment UA packet to the host computer 14 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 17 LLC connect_conf frame received The DLSw circuit reaches the CONNECTED state Router A and Router B return receiver ready RR packets to their clients 15 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 16 State change in connect conf conn 30927f70 old state 3 new state 1 Establishing DLSw SDLC Connections Figure C 2 illustrates a sample dual switch DLSw SLDC network and the network packet exchanges that occur during SDLC connection establishment Connection establishment generates debug event messages in the log file 303523 A Rev 00 C 11 Configuring DLSw Services Token Ring T
9. ccccsscceeeeeeeeeeeeeeeteeeeeeseteeeeeeeee 575 Editing DLSw Basic Interlace Paratmefers 2er rsen irr rentrer Yer 5 7 Editing the DLSw Advanced Global Parameters sss 5 9 ere Tec e 5 22 Enabling a DLSw Interface Using the Edit Circuits Function 5 25 Editing DLSw Peer IP Table Parameters errat erret Remnant an nutus iaa e ers n aded 70 Adding a DLSw Peer IP Table ENUY acier racemos ctam tea ouie 5 32 Deleting a DE Sw Peer IP Table ENY 4aiiocsenssever tr rie te Ra Pene i Yin e ecc o Senda 5 35 Eding the DLW iM MI Ree LE ILS Adding a DLSw Slot IP Table EnfEy iauceccuaescccimtebazdsa esae tede psa om esa ia tone saxo 5 37 Editing a OLSw Slot IP Table Enty eu nee epu anina nee MAR RR AR 5 39 Deleting a DLSw Slot IP Table EMY 2uesccassiccrixiite perii ta IHE tr Ra Pn qn EE I td dd pt EUR Editing DLSw SAP Table PRIBIBOUBES seunas ER CEU RP GR E Co aU Y DN 5 41 Adding a DLSw SAP Table EFI uiae caiaskax diutina tx kR UM tbAFU MER AI e MEE pe MdU MIU Ea eed 5 42 Editing a DLSw SAP Table EIU duerme tert ebat oe pau cipue a 5 43 Deleting a DESWw SAP Table EMY uias erar eer ROG BEER ERR S a 5 45 Editing DLSw Default NetBIOS Peer IP Table Parameters ipit ioa AeA 5 46 Adding a DLSw Default NetBIOS Peer IP Table Entry sseeessesss 5 47 Editing a DLSw Default NetBIOS Peer IP Table Entry seees 5 50 Deleting a DLSw Default NetBIOS Peer IP Table
10. Cancel OK Values Help ENABLE PRIMARY Edit DLSw Interface Window 5 Click on Values and select Enable or Disable If you are editing an SDLC circuit edit the DLSw Mode parameter by clicking on Values and selecting Primary Secondary PP or Secondary MP for the type of SDLC link station in this configuration Click on OK This closes the Edit DLSw Interface window and the Circuit Definition window reappears refer to Figure 5 8 Select File gt Exit The result of Step 5 depends on how you originally accessed the DLSw Interface Enable parameter If you selected Circuits gt Edit Circuits from the Configuration Manager window the Circuit List window appears refer to Figure 5 6 Clicking on Done in the Circuit List window completes the procedure and returns you to the Configuration Manager window 303523 A Rev 00 5 27 Configuring DLSw Services e Ifyou selected a connector to invoke the Edit Connector window refer to Figure 5 7 the Configuration Manager window appears indicating that you completed the procedure Editing DLSw Peer IP Table Parameters The DLSw Peer IP Table contains the list of all configured remote peers known to the local router This section describes how to add edit and delete configured peers Refer to Chapter 3 for more information on configured and unconfigured peers To access the DLSw Peer IP Table begin at the Configuration Manager w
11. 1 3 6 1 4 1 18 3 5 1 5 1 26 Note Because a DLSw slot can have multiple ports or interfaces the Multislot Broadcasts parameter setting affects all DLSw ports on the slot on which CANUREACH frames are received 303523 A Rev 00 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Initial Pacing Window 5 5 to 100 Specifies the initial number of received data frames that the local DLSw router permits during an established connection with another DLSw router running RFC 1795 or DLSw Version 2 The two DLSw routers advertise their initial pacing value to each other over capabilities exchange messages Enter a value in the range 5 to 100 Depending on the amount of network traffic during the session the router may increase or decrease the pacing window size An increase in the window size means that the router is granting permission to receive more data frames from the sending DLSw router A decrease in the window size means that the router is reducing the number of data frames that it will accept from the sending DLSw router 1 3 6 1 4 1 18 3 5 1 5 1 27 NetBIOS Session Alive Filter Enable Enable Disable Enables or disables the NetBIOS session alive frame transmissions Continuously sending session alive frames can cause lines to remain active unnecessarily possibly increasing the us
12. Default Bandwidths 60 40 0 0 0 0 0 0 0 0 Max Queue Buffers 50 Max Queue Size 16000 Queue Number None Queue Bandwidth Percent 0 Table A 12 DLSw Multicast Configuration Parameters Parameter Default Multicast IP Address 0 0 0 0 Slot 00000 Multicast IP Slots Depends on slot numbers selected for Slot parameter Backup Config No Backup IP Address 0 0 0 0 Backup Peer Type V20 Unicast Unknown Backup Max Up Time 0 Backup Hold Down Time 120 Backup Start Time 1 BAckup End Time 2400 303523 A Rev 00 Appendix B Criteria for DLSw Prioritization This appendix includes both the DLSw predefined criteria that the Configuration Manager provides and the supported DLSw reference points for user defined criteria for DLSw prioritization described in Chapter 6 303523 A Rev 00 B 1 Configuring DLSw Services Predefined DLSw Criteria You configure outbound filters for DLSw traffic based on the predefined criteria listed in Table B 1 Table B 1 Predefined Outbound Filter Criteria Based on DLSw Header Packet Type or Component Predefined Criteria Any MAC Source Address MAC Destination Address DSAP SSAP FID4 FID Type Network Priority Trans Priority Dest Subarea Address Origin Subarea Address Expedited Flow Indicator Destination Element Origin Element User Defined FID2 FID Type EFI Expedited Flow Indicator D
13. Enter the 8 byte ASCII link station name 1 3 6 1 4 1 18 3 5 1 7 5 1 32 PU Type None T1 0 T2 0 T2 1 Specifies the type of the XID sending node This parameter is used with the IDBLOCK IDNUM and XID Format parameters to determine the station exchange identification XID value The value must match the PU type of the SDLC attached device For some devices this is a fixed value For example BM 5394 PU 1 0 e IBM 3274 PU2 0 BM 5494 PU 2 1 For other devices the PU Type is explicitly defined For example the IBM 3174 can be configured as PU 2 0 or PU 2 1 Choose T1 0 T2 0 or T2 1 N A 303523 A Rev 00 4 23 Configuring DLSw Services Parameter IDBLOCK Default None Options Any 3 digit hexadecimal value Function Specifies the block number which must match the host s IDBLOCK parameter value that identifies incoming connection requests This parameter is used with the PU Type IDNUM and XID Format parameters to determine the station exchange identification XID value Table 4 2 lists the IDBLOCK numbers Instructions Obtain the configured value at the host from VTAM or other host operating system for this device MIB Object ID N A 4 24 303523 A Rev 00 Starting DLSw Table 4 2 IDBLOCK Numbers for Switched PUs Device IDBLOCK Number NPSI 003 3770 004 3650 3680 005 6100 3790 006 NTO 3767 00
14. KeepAlive Retries parameter 5 20 KeepAlive Retry Timer parameter 5 19 KeepAlive Time parameter 5 19 L learning capabilities 3 20 Link Station Address hex parameter 4 22 5 61 Link Station Retries parameter 4 31 5 70 link station roles 1 17 Link Station Timer parameter 4 31 5 69 LLC flow control 2 11 LLC2 media support 1 3 local acknowledgment 1 21 local device entries deleting 5 71 local devices adding 3 17 4 20 editing parameters for 5 58 local devices parameters Canureach Retries 4 29 5 68 Canureach Retries2 4 30 5 69 Canureach Timer 4 29 5 67 Canureach Timer2 4 30 5 68 Destination Host MAC hex 4 28 303523 A Rev 00 local devices parameters continued Destination Host SAP hex 4 28 Destination MAC hex 5 66 Destination SAP hex 5 66 Device Activation Seq 4 32 Disable 4 22 5 61 DLSw Mode 4 22 Enable XID PassThru 4 32 IDBLOCK 5 63 Link Station Address hex 5 61 Link Station Retries 4 31 5 70 Link Station Timer 4 31 5 69 MAXDATA 4 29 5 67 MAXOUT 4 28 5 67 PU IDBLOCK 4 24 PU IDNUM 4 26 PU Name parameter 4 23 5 62 PU Type 4 23 5 62 SDLC Receive Credit 4 31 5 70 SDLC Transmit Credit 4 32 5 70 Source Virtual MAC hex 4 27 5 65 Source Virtual SAP hex 4 27 5 66 XID Format 4 26 5 65 Local MAC parameter 4 15 MAC Address parameter 5 55 MAC Cache Age parameter 5 14 MAC Peer IP Address parameter 5 55 Max Queue Buffers for Unco
15. Options Any valid unassigned ring number from 1 to 4095 0x001 to OxFFF in hexadecimal format Function Specifies a standard ring number that SRB uses to identify traffic that DLSw places on the SRB LAN This ring number is the first entry in the packet s routing information field RIF Instructions The ring number must be unique within the network However all Bay Networks routers on the network can use the same value The number must be e Unique among any other ring IDs group LAN IDs or internal LAN IDs assigned in the network e The same as the virtual ring number used by all other DLSw peers on the same TCP IP network Entering a hexadecimal value for this mandatory parameter prepares the router for DLSw services on Token Ring 802 5 circuits Enter a value even if you are presently configuring DLSw services on Ethernet 802 3 circuits only Bay Networks recommends the value OxFFD if this value is available MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 5 Note The DLSw Virtual Ring ID parameter provides compatibility with SRB networks locally attached to the router Site Manager requires you to enter a value for the DLSw Virtual Ring ID even if you are configuring DLSw services on non SRB segments locally attached to the same router 303523 A Rev 00 4 7 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Ins
16. Priority queues do not affect traffic as it is entering the router but rather affect the sequence in which data leaves an interface For this reason protocol prioritization is considered an outbound filter mechanism Types of Protocol Prioritization There are two separate implementations of protocol priority queuing For all synchronous protocols that support outbound traffic filters Bay Networks supports a high normal and low priority queue at the circuit interface level For inbound and outbound DLSw traffic Bay Networks also supports one to ten queues at the TCP level for DLSw peers Using existing protocol prioritization support you can prioritize DLSw traffic before other protocols DLSw protocol prioritization gives preference to specific types of DLSw traffic such as e Ethernet Frame Relay e SDLC Token Ring e Other SRB traffic Note You can apply both circuit level and TCP level prioritization to DLSw traffic Note that TCP level prioritization alone does not give DLSw traffic precedence over other routing protocols For information about circuit level prioritization refer to Configuring Traffic Filters and Protocol Prioritization 6 2 303523 A Rev 00 Using DLSw Prioritization DLSw Priority Queues This section describes how DLSw protocol prioritization works and defines DLSw terms Although similar to the existing circuit level protocol prioritization DLSw prioritization is not limit
17. TCP Window Size e KeepAlive Time e Reject Unconfigured Peers e Mac Cache Age e TCP Inact Time TCP Window Size The TCP Window Size parameter informs DLSw about how much data can be outstanding on a TCP connection The size of the window affects performance latency flow control and memory usage A larger window causes less flow control to occur with a possible increase in latency Editing the TCP Window Size parameter affects new TCP session establishment only Existing sessions are unaffected Generally networks with slower line speeds require smaller window sizes while networks with faster line speeds benefit from larger windows The default value is acceptable for most networks A TCP Window Size setting of 5000 octets may be appropriate for low speed lines or networks running over low speed lines For high speed lines you may want to increase this value or use the default value of 8000 KeepAlive Time The TCP KeepAlive Time parameter specifies how often the router sends a signal to the peer router to check that the peer router is working correctly and can receive messages You enable the parameter by specifying a nonzero value When a keepalive packet goes unacknowledged by the remote peer retransmission begins at the local peer router You should tune the keepalive interval based on the total time it takes to send and receive acknowledgment from the remote peer 3 8 303523 A Rev 00 DLSw Configuration Overv
18. To edit the IP address associated with a particular slot begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols DLSw Slot IP Table The DLSw Slot Configuration window appears Figure 5 14 2 Select the DLSw Slot IP Table entry 3 Click on the IP Address for TCP Connection parameter box and enter a new IP address 4 Click on Apply This saves your changes to the router configuration file Delete Apply Values Help pd _ a A IP Address for TCP Connection 198 42 62 4 Ie Figure 5 14 Saving an Edited DLSw Slot IP Address 5 Click on Done The Configuration Manager window reappears 303523 A Rev 00 5 39 Configuring DLSw Services Following is a description of the IP Address for TCP Connection parameter Parameter IP Address for TCP Connection Default None Options Any valid 32 bit IP address in the form network host in dotted decimal notation Function Specifies an IP address associated with a specific DLSw peer slot in the router TCP uses this IP address for connections associated with that slot Instructions Type a valid IP address for each slot Do not enter a value for every active slot in the router enter only a single IP address associated with a single DLSw slot MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 3 1 3 Deleting a DLSw Slot IP Table Entry To delete a DLSw Slot IP Table entry start at the DLSw Slot Configuration window Fig
19. 303523 A Rev 00 4 29 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Canureach Timer2 30 0 to 3600 Specifies the time interval in seconds after which the router sends a canureach message to the remote DLSw peer to establish a session This parameter setting becomes active when the Canureach Timer and Canureach Retries settings expire Set the Canureach Timer2 and the Canureach Retries2 parameters in configurations where you want to switch to a longer interval if the initial connection does not occur within the Canureach Timer and Canureach Retries settings The slow poll timer would then use the Canureach Timer2 and Canureach Retries2 settings Enter the number of seconds that you want for the time interval For example enter 1 to transmit a CANUREACH message once per second or enter 3600 to transmit the command once per hour Enter 0 if you do not want to transmit a CANUREACH message 1 3 6 1 4 1 18 3 5 1 5 12 1 17 Canureach Retries2 0 0 to 4294967295 Specifies the number of times a CANUREACH message is sent to the remote DLSw peer to establish a session This parameter setting becomes active when the standard Canureach Retries parameter setting expires Set the Canureach Timer2 and the Canureach Retries2 parameters in configurations where you want to switch to a longer interval i
20. Configuring DLSw Services BayRS Version 13 00 Site Manager Software Version 7 00 BCC Version 4 05 Part No 303523 A Rev 00 October 1998 CES Bay Networks Where Information Flows Bay Networks Where Information Flows 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1998 Bay Networks Inc All rights reserved Printed in the USA October 1998 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Bay Networks Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license A summary of the Software License is included in this document Trademarks ACE AFN AN BCN BLN BN BNX CN FRE LN Optivity PPX and Bay Networks are registered trademarks and Advanced Remote Node ANH ARN ASN BayRS BaySecure BayStack BayStream BCC BCNX BLNX EZ Install EZ Internetwork EZ LAN EN IP AutoLearn PathMan RouterMan SN SPEX Switch Node System 5000 and the Bay Networks logo are trademarks of Bay Networks Inc Microsoft MS MS DOS
21. The DLSw Basic Interface Parameters window Figure 4 4 allows you to configure IP addresses on DLSw slots on the router for dual switch configurations 4 10 303523 A Rev 00 Starting DLSw Cancel OK Values Help DLSw Slot IP Address 492 67 43 1l j Figure 4 4 DLSw Basic Interface Parameters Window To add an IP address to a DLSw slot 1 Enter the IP address of the DLSw slot See the parameter description that follows 2 Click on OK Parameter DLSw Slot IP Address Default 0 0 0 0 Options Any IP address specified in dotted decimal notation Function Specifies a unique IP address for each slot running DLSw on the router The address cannot be reused on another slot The IP address specifies where the TCP connection for DLSw terminates Instructions Enter the appropriate IP address If a circuitless IP address is configured use that address for this parameter MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 3 1 3 303523 A Rev 00 4 11 Configuring DLSw Services Setting the DLSw Basic Interface Parameters for SRB If you are configuring a DLSw slot for a Token Ring or Frame Relay BAN network Site Manager displays the DLSw Basic Interface Parameters window Figure 4 5 with the SR Interface Ring ID parameter See Configuring Bridging Services for detailed information on the SR Interface Ring ID parameter EE Cancel OK Values Help DLSw Slot IP Address Figur
22. You can also use the circuitless IP interface address for a DLSw capable slot Using the circuitless IP interface allows TCP connections for DLSw services on that slot to be less dependent on the availability of specific physical circuits or datalinks For more information about the nature and use of the circuitless IP interface see Configuring IP Services To access the DLSw Slot IP Table begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSw gt Slot IP Table The DLSw Slot Configuration window appears showing a list of all slots serving as DLSw peers on your TCP IP network Figure 5 12 5 36 303523 A Rev 00 Editing DLSw Parameters EI DLSw Slot Configuration A lt Delete Apply Values Help IP Address for TCP Connection Figure 5 12 DLSw Slot Configuration Window Adding a DLSw Slot IP Table Entry To add a new DLSw Slot IP Table entry begin at the DLSw Slot Configuration window Figure 5 12 and 1 Click on Add The DLSw Slot Configuration window appears Figure 5 13 Figure 5 13 IP Address in DLSw Slot Configuration Window 303523 A Rev 00 5 37 Configuring DLSw Services 2 3 Type a value for the Slot parameter Type the IP address of an interface configured earlier on the router Each DLSw capable slot requires its own IP interface in the router configuration Do not specify the same IP interface address for two or mo
23. esee B 4 Source Routing Bridge Functional MAC Addresses sss B 5 Specifying Source and Destination SAP Code Ranges sss B 5 Appendix C Troubleshooting DLSw bur e ARIETE LOQ e C 1 Enabling Extended Logging sscsaeroditprr aar pesa reb t ga RE rdiet tala ac wa C 2 Using and Decoding the DLS w Lag erint sta u aerea int veia SR re ese d Sn eina s pera Aon eL bna pid dape d te ope LG ENO S e M C 5 Even COOR IG PR LE baa C 6 typed rae C 6 Event oode JG RT I C 6 Event Sr A5 EP C 6 WIES c ia cal eee ME C 7 Establishing DL Set UL Conneclione udisienevauee i ea Ep bYaias EGER pri AR Ep GE aes C 8 aig bbl dors LOO e Ped Li Establishing DELSWw SDLC Connections cisscccssiescsccccsicannnccd stamumectacesmmandbvasinecsnenzamensotnenny C 11 Reviewing the Network Connection Sequence cecceeeceeeeeeeeeeeeeteteeteneeteeeaes C 13 Disconnecting trom the NebBVorK s2iccidesdaantcaneiaxzeniacsdsdinnnnddsoacionsdcavenweeiiguindmaateaiwensaruan a 14 Toupeskhogino DLSW aee T C 15 Viewing Isolated PITODIGIERS xecuiccen itx ase ribd eec uM aga bXMRSV In EIU Esq UR E DO aaia C 15 Common DLSw Problems and Nonproblems ccceeeeeeeeeeeeeeeeeeeeeeneeeeeeees C 17 Gommam DL Sw ProD ME aaepe rec trai ebrei ater P e HR EL RE arid C 17 Common DLSw Nonproblems Creer equ E T Oa PAD Seta upto bd qu EM EN DLo5w Troubleshoo
24. Configuring DLSw Services Configuring DLSw Packaging Packaging allows multiple DLSw frames consisting of user data and DLSw s SSP header to be placed into a single TCP IP frame Packaging enhances router performance and is important for networks with many LAN WAN segments DLSw packaging uses three tuning parameters all located on the DLSw Global Parameters screen e Maximum Package Size e Packaging Threshold e Packaging Timeout For detailed information about configuring the DLSw packaging parameters refer to Chapter 5 Configuring DLSw Prioritization DLSw prioritization is an outbound filtering mechanism that allows you to assign preference to specific types of traffic supported by DLSw DLSw Prioritization does not affect traffic as it enters the router but affects the sequence in which data leaves the router slot DLSw prioritization uses the following parameters e Protocol Priority Max Queue Buffers e Max Queue Size You can define these parameters in two places e For configured peers you define the parameters independently for each remote peer each entry in the Peer Table These are referred to as specific queues e For unconfigured learned peers the default values appear on the Global DLSw PP Parameters Defaults window Because these are the default queues the displayed values are also the defaults for the configured peers For detailed information about accessing and configuring the DLSw prio
25. Enabled Disabled Toggles protocol prioritization on and off for configured DLSw peers If you set this parameter to Disabled all default priority queues will be disabled Setting this parameter to Disabled is useful if you want to temporarily disable protocol prioritization for configured peers Set to Disabled if you want to temporarily disable all protocol prioritization activity Set to Enabled if you previously disabled protocol prioritization and now want to reenable it 1 3 6 1 4 1 18 3 5 1 5 1 17 Note Once you enable a peer specific priority queue using the Peer Queues window you must use that window to disable that peer s queues You cannot disable queues that are already active from the Global DLSw PP Parameters Defaults window Parameter Default Options Function Instructions MIB Object ID PP for Unconfigured Peers Disabled Enabled Disabled Toggles protocol prioritization for unconfigured DLSw peers on and off Setting this parameter to Disabled disables all unconfigured priority queues The Disabled setting is useful if you want to temporarily disable protocol prioritization for unconfigured peers Set to Disabled if you want to temporarily disable all protocol prioritization activity Set to Enabled if you previously disabled protocol prioritization and now want to reenable it 1 3 6 1 4 1 18 3 5 1 5 1 20 303523 A Rev 00 6 13 Configuring DLSw Services Parameter Defau
26. Following is a description of the Default NetBIOS Peer IP Address parameter Parameter Default Options Function Instructions MIB Object ID Default NetBIOS Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of the remote DLSw peer that can reach the NetBIOS client server system or application currently selected in the DLSw NetBIOS Peer Configuration window Type the IP address of the DLSw peer that can reach the remote client server or application currently selected in the DLSw NetBIOS Peer Configuration window The router adds this IP address to the list of configured peers in the local DLSw Peer IP Table 1 3 6 1 4 1 18 3 5 1 5 11 1 3 Deleting a DLSw Default NetBIOS Peer IP Table Entry To delete a DLSw Default NetBIOS Peer IP Table entry from the router configuration start at the DLSw NetBIOS Peer Configuration window Figure 5 23 1 Select the table entry to delete 303523 A Rev 00 Configuring DLSw Services Done Add Apply Values Help 1 Default NetBios Peer IP Address 198 42 61 5 Ie Figure 5 23 Deleting a DLSw Default NetBIOS Peer IP Table Entry 2 Click on Delete The system deletes the entry you selected and removes the entry from the list 3 Click on Done You return to the Configuration Manager window Editing DLSw Default MAC Peer IP Table Parameters The DLSw Default
27. Frame Relay Circuitless TIT 192 32 100 1 Front end SDLC processor control unit Router B Router A Router C SAP Table SAP Table SAP Table 0x00 0x04 0x08 0x0C DLS0021A Figure 3 2 Sample Network with SAP Table Definitions Refer to Chapter 5 for more information about accessing and editing the DLSw SAP Table 303523 A Rev 00 3 5 Configuring DLSw Services Adding Dual Switch DLSw Services When configuring DLSw dual switch services DLSw is enabled only on interfaces supporting LAN SDLC QLLC or APPN Boundary attached devices The links between routers are configured for IP routing DLSw is not configured on these links Figure 3 3 illustrates a DLSw dual switch network In this network e Dual switch services are used between routers Any SNA device attached to Router A can communicate with the AS 400 or FEP connected to Router B e Single switch conversion can be used between DLSw interfaces on Router A as well as between the DLSw interfaces on Router B This allows the AS 400 to communicate with the FEP e The connection between Router A and Router B can be any medium that supports IP Intermediate routers that are located between Router A and Router B must transport IP packets using IP routing DLSw is not required by the intermediate node EET Frame Relay network CT Front end processor AS 400 00 c 3
28. Internal Clock Speed 19200 KB 1200 B 2400 B 4800 B 7200 B 9600 B 19200 B 32000 B 38400 B 56 KB 64 KB 125 KB 230 KB 420 KB 625 KB 833 KB 1 25 MB 2 5 MB 5 MB Sets the clock speed of an internally supplied clock when Clock Source is set to Internal Attached devices must be capable of operating at the specified speed Some of the more common allowed speeds for IBM products are as follows e AnIBM 3274 with an V 24 RS 232 interface supports up to 9600 b s Some support speeds up to 19200 b s e An IBM 3274 with a V 35 interface supports up to 64 Kb s e An IBM 3174 with a V 24 RS 232 interface supports up to 19200 b s e An IBM 3174 with a V 35 interface and running Licensed Internal Code C supports up to 256 Kb s Click on Values and set the clock speed for the internal clock to the desired data transmission rate across the synchronous line This parameter is unavailable when Clock Source is set to External 1 3 6 1 4 1 18 3 4 5 1 14 303523 A Rev 00 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Sync Line Coding NRZ NRZ NRZI NRZI Mark Sets the same line coding value for all devices attached to the same SDLC link You can change the value of this parameter to match the line coding of a device at the other end of the line e NRZ Indicates nonreturn to zero encoding e NRZI Indicates nonreturn to zero inverted encodin
29. MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Link Station Retries 4294967295 0 to 4294967295 Specifies the maximum number of times that a connect request is sent to the local SDLC device to establish a session Enter the number of retries that you want Type 0 if you do not want to send connect requests Leave the default value 4294967295 to send an infinite number of connect requests for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 14 SDLC Receive Credit 10 0 to 200 Specifies the maximum number of frames that SDLC can send to DLSw This is a flow control parameter Enter the maximum number of frames that you want SDLC to send to DLSw For example type 1 if you want DLSw to accept one frame from SDLC before it updates the SDLC credit Type 0 if you want DLSw to receive an infinite number of frames from SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 15 SDLC Transmit Credit 10 0 to 200 Specifies the maximum number of frames that DLSw can send to SDLC Enter the maximum number of frames that you want DLSw to send to SDLC For example type 1 if you want DLSw to send only one frame to SDLC until it receives credit update from SDLC Type 0 if you want DLSw to send an infinite number of frames to SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 16 5 70
30. Options Function Instructions MIB Object ID Edit the Clock Source Internal Clock Speed Sync Line Coding Cable Type and RTS Enable parameters described next Clock Source Internal External Internal Identifies whether the router provides clocking to Internal or receives clocking from External the other device The parameter specifies the origin of the synchronous timing signals If you set this parameter to Internal this router supplies the required timing signals If you set this parameter to External an external network device supplies the required timing signals For direct connection to a control unit such as an IBM 3174 set to Internal For connection to a modem set to External For direct connection to an IBM 3745 either the router or the IBM 3745 can provide the clock source If the IBM 3745 does not provide clocking set to Internal 1 3 6 1 4 1 18 3 4 5 1 13 connecting these devices must connect the transmit pins of one device to the Note When connecting the router directly to an SNA endstation the cables gt receive pins of the other Typically a DCE cable for the SNA equipment has a male interface and is connected to a Bay Networks synchronous pass through cable with a female interface Refer to Appendix C for more information about cables 4 16 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID
31. Win32 Windows and Windows NT are registered trademarks of Microsoft Corporation All other trademarks and registered trademarks are the property of their respective owners Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 i1 of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction and disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Statement of Conditions In the interest of improving internal design operational function and or reliability Bay Networks Inc reserves the right to make changes to the products described in this document without notice Bay Networks Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product may be Copyright O 1988 Regents of the University of California AII rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other
32. and initiates error recovery procedures Only one link station on an SDLC line can be the primary station all other stations on the line must be secondary When configured as a primary SDLC link station the router communicates with downstream PU 2 0 and PU 2 1 nodes A secondary link station receives commands and responds to primary link station polls When configured as a secondary SDLC link station the router emulates a PU 2 0 device Click on Values and select Primary Secondary PP or Secondary MP 1 3 6 1 4 1 18 3 5 1 5 2 1 8 Link Station Address hex None Any valid hexadecimal link station address from 0x01 to OxFE Specifies the address of the link station This parameter must match the polling address defined in the SDLC attached device Type Ox followed by the link station address N A Disable Enable Enable Disable Enables or disables the DLSw local device Set to Disable if you want to temporarily disable the local device rather than delete it Set to Enable if you want to reinitialize the local device 1 3 6 1 4 1 18 3 5 1 5 12 1 2 4 22 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID PU Name None Any valid 8 byte ASCII name Specifies the name of the adjacent link station This name uniquely identifies the station for statistics and Alert messages
33. 1 Select Protocols gt DLSw gt Multicast IP Table gt Multicast IP Table 303523 A Rev 00 Configuring DLSw Services The DLSw Multicast Configuration window opens Select the IP multicast entry you want to edit Edit the parameters for the selected entry using the descriptions below If you want to enable the backup feature select Yes for the Backup Config parameter Click on Done The first DLSw Multicast Configuration window reopens To add more multicast entries from the DLSw Multicast Configuration window 5 Click on Add A second DLSw Multicast Configuration window opens Supply an IP multicast group address and associate the address with a slot or slots Click on OK The first DLSw Multicast Configuration window reopens Edit the parameters using the descriptions below If you want to enable the backup feature select Yes for the Backup Config parameter Click on Done The Configuration Manager window opens Following are descriptions of the DLSw multicast configuration parameters Parameter Default Options Function Instructions MIB Object ID Multicast IP Address 224 0 10 0 Any valid IP address specified in dotted decimal notation The valid range is 224 0 1 0 through 239 255 255 255 Specifies the multicast IP address of this entry Enter the appropriate IP address 1 3 6 1 4 1 18 3 5 1 5 15 1 3 303523 A Rev 00 Editing DLSw Parameters Parameter Defa
34. 1 10 4 28 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID MAXDATA 2057 265 521 1033 2057 Specifies the maximum frame size that SDLC supports This value includes the transmission header TH request header RH and request unit RU Enter a maximum frame size equal to or larger than the largest frame size that will be received 1 3 6 1 4 1 18 3 5 1 7 5 1 7 Canureach Timer 30 0 to 3600 Specifies the time interval in seconds after which the router sends a CANUREACH message to the remote DLSw peer to establish a session Enter the number of seconds you want for the time interval For example enter 1 to transmit a CANUREACH message once per second or enter 3600 to transmit the message once per hour Enter 0 if you do not want to transmit a CANUREACH message 1 3 6 1 4 1 18 3 5 1 5 12 1 11 Canureach Retries 4294967295 0 to 4294967295 Specifies the number of times a CANUREACH message is initially sent to the remote DLSw peer to establish a session Enter the number of retries you want Enter 0 if you do not want to transmit CANUREACH messages Leave the default value 4294967295 to send an infinite number of CANUREACH messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 12
35. 1 4 1 18 3 5 1 5 1 24 5 16 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Packaging Threshold 20 0 to 100 Specifies the percentage of the DLSw TCP window that must be in use if DLSw is to delay sending a package one that is currently being built The default value 20 percent allows DLSw to send a package to TCP only if the TCP Window is currently using less than 3200 bytes 20 percent of the default TCP Window Size of 16 000 bytes This mechanism ensures that small packages such as acknowledgments are not delayed Type a value in the range 0 to 100 percent A value of 50 percent indicates that if 50 percent of the TCP window size is being used DLSw issues the delay as specified by the Packaging Timeout parameter 1 3 6 1 4 1 18 3 5 1 5 1 25 Multislot Broadcasts Enable Enable Disable Broadcasts received CANUREACH frames over all DLSw slots or to the specific DLSw slots on which the frames are received By default when the router receives CANUREACH frames over a DLSw port the software first converts the frames to SNA format before broadcasting the frames across all configured DLSw slots If you disable this feature the router will broadcast the frames only over the DLSw slots on which the frames are received Click on Values and select Enable or Disable
36. 10 0 to 200 Specifies the maximum number of frames that SDLC can send to DLSw This is a flow control parameter Enter the maximum number of frames you want SDLC to send to DLSw For example enter 1 if you want DLSw to accept frame from SDLC before it updates the SDLC credit Enter 0 if you want DLSw to receive an infinite number of frames from SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 15 303523 A Rev 00 4 31 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID SDLC Transmit Credit 10 0 to 200 Specifies the maximum number of frames that DLSw can send to SDLC Enter the maximum number of frames you want DLSw to send to SDLC For example enter 1 if you want DLSw to send only one frame to SDLC until it receives a credit update from SDLC Enter 0 if you want DLSw to send an infinite number of frames to SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 16 Enable XID PassThru Disable Enable Disable Specifies whether XID is to be passed through to SDLC when the host is connected to Token Ring and the remote is SDLC This parameter is used for PU2 1 circuits Accept the default Disable or change to Enable 1 3 6 1 4 1 18 3 5 1 5 12 1 19 Device Activation Se
37. 12 1 17 5 68 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Canureach Retries2 0 0 to 4294967295 Specifies the number of times a CANUREACH message is sent to the remote DLSw peer to establish a session This parameter setting becomes active when the Canureach Retries setting expires Set the Canureach Timer2 and the Canureach Retries2 parameters in configurations where you want to switch to a longer interval if the initial connection does not occur within the Canureach Timer and Canureach Retries settings Type the number of retries that you want Enter 0 if you do not want to transmit CANUREACH messages Type 4294967295 to send an infinite number of CANUREACH messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 18 Link Station Timer sec 30 0 to 3600 Sets the time interval in seconds after which the router sends a connect request to the local SDLC device to establish a session Enter the number of seconds that you want for the time interval For example type 1 to send a connect request once a second or type 3600 to send a connect request once an hour Type 0 if you do not want to send connect requests 1 3 6 1 4 1 18 3 5 1 5 12 1 13 303523 A Rev 00 5 69 Configuring DLSw Services Parameter Default Range Function Instructions
38. Access or Connecting ASN Routers to a Network Make sure that you are running the latest version of Bay Networks BayRS and Site Manager software For information about upgrading BayRS and Site Manager see the upgrading guide for your version of BayRS 303523 A Rev 00 xix Configuring DLSw Services Text Conventions This guide uses the following text conventions angle brackets lt gt bold text braces brackets Indicate that you choose the text to enter based on the description inside the brackets Do not type the brackets when entering the command Example If the command syntax is ping ip address you enter ping 192 32 10 12 Indicates text that you need to enter and command names and options Example Enter show ip alerts routes Example Use the dinfo command Indicate required elements in syntax descriptions where there is more than one option You must choose only one of the options Do not type the braces when entering the command Example If the command syntax is show ip alerts routes you must enter either show ip alerts or show ip routes Indicate optional elements in syntax descriptions Do not type the brackets when entering the command Example If the command syntax is show ip interfaces alerts you can enter either show ip interfaces or show ip interfaces alerts XX 303523 A Rev 00 Preface italic text screen text separat
39. DLSw Advanced Global Parameters Parameter Default Enable Enable TCP Window Size 8000 octets IP Virtual Ring None Max Slot Sessions 200 sessions per slot Virtual Ring MTU 1500 MAC Cache Age 300 s NetBIOS Cache Age 300 s Reject Unconfigured Peers Accept DLSw RFC Version RFC 1434 Maximum Package Size 1532 bytes Packaging Timeout 10 ms Packaging Threshold 2096 of TCP window size Multislot Broadcasts Enable Initial Pacing Window 5 NetBIOS Session Alive Filter Enable KeepAlive Time 60s KeepAlive Retry Timer 60s KeepAlive Retries 4 SNA Fallback Attempts 5 NetBIOS Fallback Time 180s TCP Inact Time 300 s TCP Inact Method CIRCUITS 303523 A Rev 00 DLSw Default Settings Table A 4 DLSw Advanced Interface Parameters Parameter Default Enable Enable DLSw Mode Primary Table A 5 DLSw Peer IP Table Parameters Parameter Default Peer IP Address None Transport Type Unknown Backup IP Address 0 0 0 0 None Backup Max Up Time 0 Backup Peer Type V20 Unicast Unknown Backup Hold Down Time 120 Backup Start Time 1 Backup End Time 1 Backup Delete Create Table A 6 DLSw Slot IP Table Parameters Parameter Default IP Address for TCP Connection None Slot None IP Address None 303523 A Rev 00 Configuring DLSw Services
40. DLSw related broadcast frames MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 5 1 3 5 34 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Transport Type Unknown TCP UDP Unknown Specifies the transport capabilities at the remote peer TCP UDP or Unknown The local router attempts to use this configured transport option when establishing a TCP connection with the remote peer The Transport Type parameter is available only when the DLSw RFC Version parameter is set to V2 0 A remote peer configured with the transport type TCP operates in RFC 1795 mode A remote peer configured with the transport type UDP operates in DLSw Version 2 0 mode only When set to UDP the router does not make any attempts to revert to RFC 1495 An unknown peer operates in DLSw Version 2 0 mode Unless a TCP connection already exists the local peer uses UDP explorer frames to locate the remote peer MAC address prior to establishing the connection The unknown peer can revert to RFC 1795 if there is no response to the UDP explorer frames Click on Values and select TCP UDP or Unknown If you select Unknown use the SNA Fallback Attempts parameter to set the number of connection attempts using UDP explorer frames before reverting to earlier RFCs 1 3 6 1 4 1 18 3 5 1 5 5 1 10 Deleting a DLSw Peer IP Table Entry You cannot edit the Peer IP Address parameter associated
41. Decide whether to create a new template or use an existing template e If no existing template matches your needs create a new filter template e To create a template similar to an existing one copy the existing template to preserve the original template to a new template with the same criteria and actions Then edit the new template e To modify an existing template without preserving the original template edit the existing template Note that changing a template does not affect interfaces to which the template has already been applied 6 24 303523 A Rev 00 Using DLSw Prioritization 4 Click on Create to make a new template or select an existing template and click on Edit The Create DLS Template window or the Edit DLS Template window appears Creating and editing templates involve the same steps you use both windows exactly the same way 5 Name the template 6 Select a DLSw criterion Figure 6 1 Figure 6 15 Selecting a Predefined DLSw Outbound Filter Criterion 303523 A Rev 00 6 25 Configuring DLSw Services Refer to Appendix B for information about the DLSw outbound traffic filter criteria 7 Select Action gt Add gt Queue Fig S Bad ual Figure 6 16 Selecting the DLSw Queue Action The Queue Number window appears 6 26 303523 A Rev 00 Using DLSw Prioritization Figure 6 17 Queue Number Window 8 Enter the queue number DLSw will send traffic
42. E Hm 3174 Router B Router A DLS0030A Figure 3 3 DLSw Dual Switch Network Example 3 6 303523 A Rev 00 DLSw Configuration Overview Dual Switch Configuration Requirements To configure dual switch DLSw services on the router you define e DLSw basic global and basic interface parameters e DLSw advanced global and advanced interface parameters e DLSw Slot Table entries e DLSw Peer IP Table entries DLSw Basic Global and Basic Interface Parameters In dual switch configurations DLSw requires the same global parameters as single switch DLSw Dual switch configurations also require that you use the following parameters e DLSw Peer IP Address optional e DLSw Slot IP Address e DLSw RFC Version Refer to the DLSw Peer IP Table section for information about DLSw peers refer to the DLSw Slot Table section for information about configuring DLSw slots You can also use the DLSw RFC Version parameter to select a specific implementation of DLSw to run on the router DLSw RFCs include e RFC 1434 e RFC 1795 e DLSw Version 2 e RFC 2166 Refer to Chapter 5 for information about the DLSw RFC Version parameter 303523 A Rev 00 3 7 Configuring DLSw Services DLSw Advanced Global Parameters In dual switch configurations you may want to edit those parameters that directly tune network performance such as
43. ID Parameter Default Options Function Instructions MIB Object ID Backup IP Address 0 0 0 0 Any valid 32 bit IP address of the form network host using dotted decimal notation Specifies the IP address of a backup DLSw peer and adds the peer to the DLSw Backup Peer IP Table A backup peer receives all DLSw related broadcast frames for a given router or network processor if the primary peer router is unavailable or cannot be reached over a TCP connection Enter the IP address of the backup peer 1 3 6 1 4 1 18 3 5 1 5 15 1 6 Backup Peer Type V20 Unicast Unknown RFC 1795 V20 Unicast TCP V20 Unicast Unknown V20 Unicast UDP RFC 2166 Multicast Specifies the type of this DLSw backup peer Accept the default V20 Unicast Unknown or click on the Values button and specify a different type 1 3 6 1 4 1 18 3 5 1 5 15 1 11 Backup Max Up Time 0 0 to 999999 Specifies the maximum time in seconds that the backup peer can remain connected to the local DLSw peer When the maximum time is reached the software terminates the TCP connection if there are no active TCP sessions between the routers The software overrides the Backup Max Up Time parameter setting only if there is an active non idle TCP connection with data transferring between the routers Type a value in the range 0 to 999999 Specify 0 to disable the Backup Max Up Time parameter 1 3 6 1 4 1 18 3 5 1 5 15 1 7 5 74 30352
44. If the sessions are in an established state the local and remote DLSw TCP slot peer configuration is probably correct 303523 A Rev 00 Troubleshooting DLSw If the sessions are not in an established state do the following e Make sure all slots configured to run DLSw have a slot IP address assigned e Make sure that the slot IP address corresponds to the DLSw Peers setting at the remote site 7 Usethe Technician Interface or the Statistics Manager to inspect the reception messages and connection state changes Common DLSw Problems and Nonproblems This section describes common problems and nonproblems associated with DLSw Common DLSw Problems Table C 4 describes common problems with DLSw LLC and SDLC and lists causes and actions Table C 5 Common DLSw Problems Problem Possible Cause Action Solution DLSw TCP connections do Improper DLS Slot Table Each slot running DLSw not come up configuration no IP address requires a unique IP configured on slot address assigned to each DLSw slot DLSw TCP connections No peer configured Add a peer and its IP partially come up address to the Peer Table DLSw connections do not DLS configured on wrong Configure DLS on an LLC or come up slot SDLC interface Single switch sessions do Both interfaces not Configure two interfaces for not establish configured single switch operation continued 303523 A Rev 00 C 17 Con
45. Instructions MIB Object ID Backup Config No Yes No Enables the parameters that allow you to configure a backup peer Accept the default No or click on the Values button and select Yes 1 3 6 1 4 1 18 3 5 1 5 15 1 5 Backup IP Address 0 0 0 0 Any valid 32 bit IP address of the form network host using dotted decimal notation Specifies the IP address of a backup DLSw peer and adds the peer to the DLSw Backup Peer IP Table A backup peer receives all DLSw related broadcast frames for a given router or network processor if the primary peer router is unavailable or cannot be reached over a TCP connection Enter the IP address of the backup peer 1 3 6 1 4 1 18 3 5 1 5 15 1 6 Backup Peer Type V20 Unicast Unknown RFC 1795 V20 Unicast TCP V20 Unicast Unknown V20 Unicast UDP RFC 2166 Multicast Specifies the type of this DLSw backup peer Accept the default V20 Unicast Unknown or click on the Values button and specify a different type 1 3 6 1 4 1 18 3 5 1 5 15 1 11 303523 A Rev 00 4 39 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Backup Max Up Time 0 0 to 999999 Specifies the maximum time in seconds that the backup peer can remain connected to the local DLSw peer When the maximum time is reached the software terminates the TCP connecti
46. Network For mixed topologies an end to end connection path includes an SRB and a non SRB LAN In such cases do not exceed the maximum number of SRB LAN and bridge elements allowed on the SRB LAN side of the connection path For detailed information on SRB refer to Configuring Bridging Services Virtual Rings Just as each physical Token Ring in a source routing network has an associated ring ID the DLSw network has a virtual ring ID You enter this ring ID with the IP Virtual Ring parameter The virtual ring also has an associated MTU size The Virtual Ring MTU parameter specifies a maximum size for frames sent from local systems to systems on remote source routing networks Use as a value for the MTU the smallest frame size supported on any remote source routing segment in your network You can access and edit the IP Virtual Ring and Virtual Ring MTU parameters through the DLSw Global Parameters window 303523 A Rev 00 DLSw Implementation Notes Note Site Manager requires you to enter a value for the IP Virtual Ring parameter even if your network includes only Ethernet 802 3 circuits configured for access to DLSw services Count the IP virtual ring as one ring in each source routing segment attached to your TCP IP network You count the IP virtual ring first rather than last to avoid configuring source routing segments that already contain more than eight ring elements DLSw and SRB on a Circuit On an SRB circ
47. Peer mapping cache You enter an interval to limit the amount of memory that inactive MAC cache entries consume for DLSw services on the router While the address is inactive no CANUREACH messages are transmitted for the MAC address Once the age timer expires CANUREACH messages can be transmitted again TCP Inact Time Specifies the period of inactivity to elapse before terminating a TCP connection Inactivity may result after a prior session has terminated or if no data has been transferred The TCP Inact Time parameter functions with DLSw Version 2 and RFC 2166 and with configured DLSw backup peers This parameter operates with the TCP Inact Method parameter 303523 A Rev 00 3 9 Configuring DLSw Services DLSw Slot Table Each slot on a Bay Networks router running DLSw acts as an independent data link switch You identify each slot by assigning a unique IP address for the slot This mapping is done in the DLSw Slot Table Each entry in the table consists of a DLSw slot number plus the address of the IP interface that you allocate for that slot The router uses this IP address to establish the TCP sessions between peers in a DLSw network Generally the IP address that you select is either the circuitless IP address or the IP address of any interface on this slot However it is acceptable to use the IP address of any interface on any slot For configurations that do not have as many physical IP interfaces as DLSw slots add I
48. RFC1795 V2 0 Unicast RFC2166 Multicast Selects the RFC implementation to run on the router RFC 1434 RFC 1795 or DLSw Version 2 0 Click on Values and select RFC 1434 RFC 1795 or V2 0 Refer to Chapter for detailed information on these RFCs 1 3 6 1 4 1 18 3 5 1 5 1 28 303523 A Rev 00 5 15 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Maximum Package Size 1532 0 to 2147483647 Specifies the maximum amount of information in bytes that can reside in one package when sending multiple DLSw frames in a single TCP frame for transmission over a wide area network DLSw does not split switch to switch protocol SSP frames SSP header and user data among multiple packages Specify a value smaller than the TCP Window Size parameter and less than or equal to the Virtual Ring MTU size for the network minus the size of the TCP IP and MAC headers Specify 0 to disable packaging 1 3 6 1 4 1 18 3 5 1 5 1 23 Packaging Timeout msec 10 0 to 2147483647 Specifies the time interval in milliseconds to delay a package before sending it to TCP This value is based on the Packaging Threshold parameter The value should not be greater than the time it takes to send the number of outstanding bytes before packaging begins Type any positive integer in the range 0 to 2147483647 1 3 6
49. The TCP Inact Time parameter operates with DLSw Version 2 and with configured DLSw backup peers Enter a time in the range 0 to 2147483647 seconds 1 3 6 1 4 1 18 3 5 1 5 1 33 TCP Inact Time sec 300 0 to 2147483647 Specifies the period of inactivity to elapse before terminating a TCP connection Inactivity may result after a prior session has terminated or if no data has been transferred The TCP Inact Time parameter functions with DLSw Version 2 and with configured DLSw backup peers This parameter operates with the TCP Inact Method parameter Enter a time in the range 0 to 2147483647 seconds 1 3 6 1 4 1 18 3 5 1 5 1 34 303523 A Rev 00 5 21 Configuring DLSw Services Parameter TCP Inact Method Default Circuits Options Never Circuits Data Function Specifies the type of connection that will cause a TCP connection to terminate when the TCP inactivity time expires Inactivity results when there is no active DLSw circuit between the local router and a remote peer or if no data has been transferred between the peers The TCP Inact Method parameter functions with DLSw Version 2 and with configured DLSw backup peers This parameter operates with the TCP Inact Time parameter Instructions Click on Values and select Never Circuits or Data e Select Never to keep the TCP connection active when the inactivity time expires e Select Circuits to disable the TCP connection when a session does not exist between th
50. Window 2 Select Protocol Priority PP and click on Values The Protocol Priority PP Values Selection window appears Figure 6 3 303523 A Rev 00 6 9 Configuring DLSw Services Protocol Priority CPP Uk Figure 6 3 Enabling Protocol Prioritization on DLSw Peers 3 Select ENABLED 4 Click on OK The Global DLSw PP Parameters Defaults window reappears Figure 6 2 5 To also use the default priority queue structure for all unconfigured peers change the value of the PP for Unconfigured Peers box to Enabled Figure 6 4 Figure 6 4 Enabling Protocol Prioritization for Unconfigured Peers 6 Click on OK The Global DLSw PP Parameters Defaults window reappears refer to Figure 6 2 7 Decide whether to use the default queue configuration or customize the queue to suit your network e To use the default queue configuration click on OK to exit Site Manager asks you to confirm Figure 6 5 6 10 303523 A Rev 00 Using DLSw Prioritization 2 Site Manger e Enable All DLSw Peers Figure 6 5 Enabling Protocol Prioritization for All DLSw Peers e To customize the default queue configuration continue with the next section Customizing the Default Queue Configuration Customizing the Default Queue Configuration Once you enable DLSw protocol prioritization any DLSw peer uses default values that control how priority queues work You can change these values ac
51. a DLSw interface to the receiver 303523 A Rev 00 Data Link Switching Overview TestP CANUREACH ex Router Receiver Slot Protocol Multicast 4 2 IP IP network DVMRP IP multicast group address 224 0 10 0 cm DLS0040A Figure 1 2 Receiving a Message Addressed to a Multicast Group You can use Site Manager to specify an IP multicast group address and associate it with a DLSw slot or slots For instructions see Configuring DLSw for IP Multicasting in Chapter 4 Sample Connection Using DLSw and IP Multicasting Figure 1 3 shows a pair of routers running DLSw in RFC 2166 mode On router A IP and DVMRP are running on slot 2 and DLSw is running on slot 3 On router B DLSw is running on slot 2 and IP and DVMRP are running on slot 3 Router A connects to end station 1 through a DLSw interface on slot 3 Router A has an IP interface on slot 2 to the IP multicast network Routers B and C are configured identically Both connect to hosts through a DLSw interface on slot 2 Both have an interface to the IP network on slot 3 On router A the network administrator has assigned IP multicast group address 224 0 10 0 to DLSw slot 3 On router B the network administrator has assigned group address 224 0 10 0 to DLSw slot 2 303523 A Rev 00 1 9 Configuring DLSw Services IP multigroup address 224 0 10 0 Router B Router A Slot Protocol Multic
52. by the link station address N A Disable Enable Enable Disable Enables or disables the DLSw local device Set to Disable if you want to temporarily disable the local device rather than delete it Set to Enable if you want to reinitialize the local device 1 3 6 1 4 1 18 3 5 1 5 12 1 2 303523 A Rev 00 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID DLSw Mode Primary Primary Secondary PP Secondary MP Specifies the type of link station that you are configuring on this node A primary link station controls a data link issues commands polls secondary stations and initiates error recovery procedures Only one link station on an SDLC line can be the primary station all other stations on the line must be secondary When configured as a primary SDLC link station the router communicates with downstream PU 2 0 and PU 2 1 nodes A secondary link station receives commands and responds to primary link station polls When configured as a secondary SDLC link station the router emulates a PU 2 0 device Click on Values and select Primary Secondary PP or Secondary MP 1 3 6 1 4 1 18 3 5 1 5 2 1 8 PU Name None Any valid 8 byte ASCII name Specifies the name of the adjacent link station This name uni
53. dual switch to switch configuration involving paired routers each connected to an intervening TCP IP network A Bay Networks router simultaneously supports both single and dual switch operation Figure 1 4 illustrates DLSw single switch and dual switch to switch networks 303523 A Rev 00 Configuring DLSw Services DLSw single switch network single router configured with two interfaces Front end processor Lu Cluster controller SDLC or QLLC Token Ring Bay Networks router Ethernet Pranieena DLSw dual switch to switch network processor dual routers configured with single interfaces to TCP IP Oo Cluster controller Token Ring SDLC or QLLC TCP IP network Bay Networks router Token Ring DLS0001A Bay Networks router Figure 1 4 DLSw Single Switch and Dual Switch to Switch Networks 1 12 303523 A Rev 00 Data Link Switching Overview Single Switch Services DLSw single switch services enable the router to perform link level conversion while providing services to ensure session integrity Examples of single switch conversions include e SDLC to Token Ring e SDLC to Frame Relay RFC 1490 e Token Ring to Ethernet Ethernet to Bridged SNA over Frame Relay e QLLC to Token Ring Single
54. edit the DLSw NetBIOS Support parameter and specify Yes to add SAP FO to the table Figure 3 2 shows a sample network with three routers running DLSw This network uses the following values in the SAP Tables e Router A the central site router supports both SNA and NetBIOS traffic SNA session traffic uses SAP 04 and NetBIOS traffic uses FO Additionally SNA requires SAP 00 for session initiation These hexadecimal values 00 04 FO must exist in the SAP Table e Router B the remote site supports NetBIOS traffic only SAP FO is the only required entry in the SAP Table By default the SAPs 0x004 0x008 and 0x00C appear in the table e Router C a regional site supports SNA traffic only In this example SNA requires SAPs 00 and 04 in the SAP Table Note that SNA traffic can use other SAPs Most SNA traffic uses SAP 04 8 4 303523 A Rev 00 DLSw Configuration Overview Router A 192 32 10 1 LAN gateway Mainframe m be ie Ti z Sha 192 32 20 1 hn NetBIOS server NetBIOS client AS 400 192 32 20 2 Router C Router B 192 32 30 2 192 32 30 1 Frame Relay 192 32 40 1 Frame Relay 192 32 40 2 Circuitless 192 32 200 1 z
55. establish or maintain a connection Enter a value in the range 0 to 99 1 3 6 1 4 1 18 3 5 1 5 1 31 SNA Fallback Attempts 5 0 to 2147483647 Specifies the maximum number of attempts the local router should make when establishing a connection with a remote DLSw peer before reverting to earlier DLSw RFCs The SNA Fallback Attempts parameter operates with DLSw Version 2 peers that you configured with the Transport Type parameter set to Unknown An unknown peer operates in DLSw Version 2 0 mode Unless a TCP connection already exists the local peer will use UDP explorer frames to locate the remote peer MAC address prior to establishing the connection The remote UDP peer can revert to RFC1795 protocols only if it receives a TCP connection from the local peer along with a Capabilities Exchange message Enter the number of attempts in the range 0 to 2147483647 Enter 0 to specify that only one connection attempt should be made before reverting to an earlier RFC 1 3 6 1 4 1 18 3 5 1 5 1 32 5 20 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID NetBIOS Fallback Time sec 180 0 to 2147483647 Specifies the period of time before a peer router with a Transport Type of Unknown reverts to RFC 1795 protocols when a NetBIOS name query from the router goes unacknowledged
56. features that were not originally published as well as modifications to the standard RFC 1795 includes e Modified frame format for session setup including a field for the largest frame size e Directed broadcast CANUREACH and ICANREACH control frames This feature reduces broadcasting over the network 303523 A Rev 00 Configuring DLSw Services e Capabilities exchange allowing routers to exchange resource information about each other Capabilities exchange flows operate in three categories Fixed information such as an organization s software version Customized information where one router transfers the information to another router Negotiation where routers negotiate the use of proprietary functions and only if both routers support the functions under negotiation e Rate based pacing a new standard for flow control between routers Flow control allows a DLSw router to inform another router to slow down or stop sending data when the receiving buffer s fill up Rate based flow control uses a windowing mechanism that allows the routers to send more or fewer packets based on the state of the last receive window If the router successfully receives the last transmission it informs the sending router to continue to send more packets Flow control is essential for successful delivery of SNA and NetBIOS data DLSw Version 2 Unicast UDP Support DLSw Version 2 and RFC 2166 are terms that can typically be use
57. from 224 0 0 0 to 239 255 255 255 Note Do not use addresses 224 0 0 0 through 224 0 0 255 these addresses are used for control purposes only On a router configured for DLSw multicasting each DLSw slot is associated with an IP multicast group address The router in Figure 1 1 for example is running DLSw on slot 3 The network administrator has assigned the group address 224 0 10 0 to slot 3 303523 A Rev 00 1 7 Configuring DLSw Services TestP CANUREACH ex Router Slot Protocol 2 IP Multicast Sender DVMRP IP network OT Tas IP multicast group address 224 0 10 0 DLS0039A Figure 1 1 Addressing a Message to an IP Multicast Group When DLSw receives a TestP message the following steps occur 1 DLSw converts the TestP message into a CANUREACH ex message 2 DLSw uses the IP multicast group address associated with slot 3 224 0 10 0 as the destination address of the CANUREACH message DLSw passes the message to IP running on slot 2 4 IP sends the message to the IP multicast network When the router receives a CANUREACH ex message on a slot configured with IP the reverse sequence occurs Figure 1 2 1 The router receives a CANUREACH ex message 2 IP determines that the CANUREACH ex message is addressed to multicast group 224 0 10 0 IP forwards the message to DLSw on slot 3 4 DLSw converts the CANUREACH ex message to a TestP message and sends it out
58. in a large number of packets traveling on the network In addition under RFCs 1434 and 1795 TCP connections must be constantly maintained between all participating routers within the DLSw network 303523 A Rev 00 Data Link Switching Overview e Under RFC 2166 network connections are established only when needed and maintained only as long the end stations require In addition end stations use multicast IP to send the initial CanuReach or NetBIOS messages thus reducing the amount of traffic on the network By default DLSw operates in RFC 1434 mode You can use Site Manager to configure DLSw in RFC 2166 multicast mode For instructions see Configuring DLSw for IP Multicasting in Chapter 4 Configuring IP Multicast Protocols on the Router A router configured for DLSw with IP multicasting support must also be running IP e IGMP e DVMRP MOSPF or both You must configure IP on at least one slot on the router and assign an IP address to each DLSw slot as described in Chapter 4 For complete information about IP multicasting and instructions for configuring IGMP DVMRP and MOSPF on the router see Configuring IP Multicasting and Multimedia Services Assigning an IP Multicast Group Address to a Slot In an IP multicasting network a sender or source of IP multicast datagrams addresses each datagram to a group of receivers An IP multicast group address is a Class D address the high order bits are set to 1110
59. instead of the expected DLSw path This could be caused by DLSw configured on the IP WAN interface on the router instead of the destination port where the DLSw traffic is to terminate Resetting dynamic window algorithm Proper LLC flow control operation is indicated by messages stating that the dynamic window algorithm is resetting Expecting SNRM prior to DLSw connection to host Refer to Configuring SDLC Services and check the Pre Activation Contact Frame parameter setting 303523 A Rev 00 C 21 Configuring DLSw Services DLSw Troubleshooting Tables Tables C 5 to C 11 provide the following troubleshooting information e DLSw configuration e DLSw interface e TCP e SNA LLC e SDLC Table C 6 DLSw Configuration Troubleshooting Problem Possible Cause Action Solution The log file contains no DLSw SDLC LLC or TCP messages Specific router slot not active for DLSw configuration Image missing components Check the hardware configuration to see if DLSw is configured on the slot Make sure that the router software image contains DLS exe LLC exe NBASE exe and SDLC exe Broadcasts are not seen on the desired LAN segments Peer not configured for destination router Configure at least one peer that must receive broadcasts C 22 303523 A Rev 00 Troubleshooting DLSw Table C 7 DLSw Interface Troubleshooting Problem Possible Cause Action S
60. local device Site Manager assigns several default parameter values to the link station For information about how to access and change the link station parameters see Configuring SDLC Services Once you add local devices you can access and change the local device parameters as described in Chapter 5 Configuring DLSw over Frame Relay When configuring DLSw over Frame Relay IBM provides two types of Frame Relay support e Boundary Network Node BNN RFC 1490 or Routed SNA e Boundary Access Node Bridged SNA Bay Networks routers select BNN or BAN when you configure the DLSw Frame Relay network When configuring a Frame Relay interface for DLSw a message prompts you to select either BNN or BAN 3 18 303523 A Rev 00 DLSw Configuration Overview Boundary Network Node RFC 1490 Because BNN format does not carry the destination MAC address incoming LAN frames must be forwarded to a specific PVC for delivery to the host The router uses a Frame Relay Mapping Table to get the destination MAC address The table has three fields e DLCI which represents a Frame Relay PVC Remote MAC which is the destination MAC address e Local MAC which is a source MAC address There is one Frame Relay Mapping Table for each physical Frame Relay interface Each entry must have a value specified for the Local MAC Remote MAC or both Incoming LLC2 packets such as LAN packets are checked against the entries in this table If a match
61. necare oan tese sek kee oca 1 25 Enterprise Ar PIM DIBDNOUK ausseosiekindqnitigem i pn dt lC da RR 1 26 Boundary Function Virtual Circuit PE eer p M E EE sia aa 1 27 End to End Connection Using a DLSw APPN Router and a DEW ROUGI e m 1 28 DLSw Capable Routers on an IP Backbone sess 2 3 Sample DLSw and SRB Betgiis ciis a esee Dart rx piae c Ra LU Ran ARR OS 2 4 DLSw and Source Route Bridging on SRB Circuits 2 6 DLSw and Transparent Bridging on Ethernet 802 3 Circuits 2 7 Translation Bridge Services cciescc tones ce pta esu REA naniii 2 8 Independent DLSw Translation Bridge Network 2 9 DLSw Services in Parallel with a Source Routing Bridge 2 9 DLSw Single Switch Network Example ssssseseeee 3 2 Sample Network with SAP Table Definitions eeessssse 3 5 DLSw Dual Switch Network Example seseris 3 6 Sample Network with Slot Table Definitions ssessssssss 9711 Sample Network with Peer IP Table Definitions 3 16 xiii xiv Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure
62. over low speed lines For high speed lines you may want to increase this value or use the default value MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 4 Note The default value is based on both NetBIOS and SNA traffic SNA and NetBIOS can have frame sizes up to 4 KB but the default virtual ring MTU limits the frame size on the network to 1500 bytes unless changed Keep the window as small as possible This allows the most consistent response time when packets are not excessively queued in TCP Selection of this parameter depends on the WAN speed and frame size distribution 303523 A Rev 00 5 11 Configuring DLSw Services Parameter DLSw IP Virtual Ring Default None Options Any valid unassigned ring number from 1 to 4095 0x001 to OxFFF in hexadecimal format Function Specifies a standard ring number that SRB uses to identify traffic that is placed on the SRB LAN by DLSw This ring number is the first entry in the packet s RIF Instructions The ring number must be unique within the network However all Bay Networks routers on the network can use the same value The number must be e Unique among any other ring IDs group LAN IDs or internal LAN IDs assigned in the network e The same as the virtual ring number used by all other DLSw peers on the same TCP IP network Entering a hexadecimal value for this mandatory parameter prepares the router for DLSw services on Token Ring 802 5 circuits Enter a value e
63. switch configurations provide services to attached devices and networks to ensure session availability including e Local acknowledgment and termination of the LLC2 SDLC or QLLC session e 802 5 routing information field RIF caching e MAC address and NetBIOS name caching Figure 1 5 illustrates a sample network using a single Bay Networks router The router can communicate with an IBM SNA processor or other LAN gateway 303523 A Rev 00 Configuring DLSw Services OS server SNA processor go Cluster controller LLC2 Token Ring Bay Networks router Ethernet Figure 1 5 LLC 2 gt i 4 LLC2 or SDLC Logical connection DLS0002A Bay Networks Single Switch Router There are three important types of single switch conversion e FRAD operation e SDLC to LLC2 conversion e QLLC to LLC2 conversion FRAD Operation Single switch services enable a Bay Networks router to function as a Frame Relay Access Device FRAD SNA devices are typically connected over a LAN or SDLC connection to the router providing local termination The router first connects to the Frame Relay or other wide area network and then to an SNA processor using the Boundary Network Node BNN or the Boundary Access Node BAN BNN is the RFC 1490 standard Refer to the Frame Relay Support section of this chapter
64. too many frames Edit DLSw packaging parameters use protocol prioritization and prioritize SNA traffic over other protocols TGP flow control is limiting performance increase the TCP Window Size parameter setting Critical data is being buffered by TCP decrease the TCP Window Size parameter setting and check performance Set the Virtual Ring MTU parameter to less than the WAN maximum transfer unit Decrease the TCP Window Size parameter setting and check performance The Response time is slower than normal The TCP window size is too large Decrease the TCP Window Size parameter setting and check performance 303523 A Rev 00 C 19 Configuring DLSw Services Common DLSw Nonproblems The DLSw log often contains debug event messages that report conditions about proper network activity These debug messages are not errors and should not be treated or reported for further action The DLSw nonproblems include e Unexpected protocol action TCP open error 29 e DLSw peers not reachable due to lack of a route e Traffic going over SRB instead of DLSw path e Resetting dynamic window algorithm e Expecting SNRM prior to DLSw connection to host Unexpected protocol action An unexpected protocol action occurred multiple times This condition indicates that frames are being transmitted between two DLSw routers while an LLC Disconnect Pending frame is processing This condition clears i
65. 00 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Canureach Retries 4294967295 0 to 4294967295 Specifies the number of times a CANUREACH message is initially sent to the remote DLSw peer to establish a session Type the number of retries that you want Type 0 if you do not want to transmit CANUREACH messages Leave the default value 4294967295 to send an infinite number of CANUREACH messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 12 Canureach Timer2 sec 30 0 to 3600 Specifies the time interval in seconds after which the router sends a canureach message to the remote DLSw peer to establish a session This parameter setting becomes active when the Canureach Timer and Canureach Retries settings expire Set the Canureach Timer2 and the Canureach Retries2 parameters in configurations where you want to switch to a longer interval if the initial connection does not occur within the Canureach Timer and Canureach Retries settings The slow poll timer would then use the Canureach Timer2 and Canureach Retries2 settings Enter the number of seconds that you want for the time interval For example enter 1 to transmit a CANUREACH message once per second or enter 3600 to transmit the command once per hour Enter 0 if you do not want to transmit a CANUREACH message 1 3 6 1 4 1 18 3 5 1 5
66. 1 Default NetBIOS Peer IP Address parameter 5 51 default NetBIOS peer IP entries adding 5 47 deleting 5 51 default NetBIOS peer IP parameters NetBIOS Name 5 49 NetBIOS Peer IP Address 5 49 dequeuing algorithms weighted dequeuing 6 5 DLSw prioritization 6 4 Destination Host MAC hex parameter 4 28 Index 1 Destination Host SAP hex parameter 4 28 Destination MAC hex parameter 5 66 Destination SAP hex parameter 5 66 Device Activation Seq parameter 4 32 Disable parameter 4 22 5 61 DLCI parameter 4 14 DLSw bridging services transparent bridge 2 6 communication over TCP IP 1 15 media support for 1 3 networking overview 1 2 peers defining in a TCP IP network 3 12 protocol prioritization 1 30 SDLC media support 1 3 single and dual switch services 1 11 DLSw IP Virtual Ring parameter 5 12 DLSw Mode parameter 4 22 5 24 5 62 DLSw NetBIOS Support parameter 5 6 DLSw packaging 2 13 DLSw parameters accessing 5 2 DLSw Reject Unconfigured Peers parameter 5 6 DLSw RFC Version parameter 4 8 5 6 5 15 DLSw SAP entries adding 5 42 deleting 5 45 DLSw slot entries deleting 5 40 DLSw Virtual Ring ID parameter 4 7 5 5 dual switch services 1 11 E educational services xxiii Enable parameter 5 10 5 24 Enable XID PassThru parameter 4 32 Ethernet 802 3 multiple DLSw peers serving a LAN 2 10 Index 2 F flow control configuration parameters for 4 31 5 43 5 70 L
67. 19 Figure 6 20 Figure C 1 Figure C 2 303523 A Rev 00 MAC Addresses in the DLSw MAC Configuration Window 5 54 Saving a DLSw Default MAC Peer IP Table Entry 9 56 Deleting a DLSw Default MAC Peer IP Table Entry 5 57 DLS Local Device Configuration Window ssesseese 5 59 DLS Local Device Configuration Add Window sseessss 5 60 Weighted Bandwidth Allocation 1er c P prb rp eda rne eens 6 6 Global DLSw PP Parameters Defaults Window essssss 6 9 Enabling Protocol Prioritization on DLSw Peers 6 10 Enabling Protocol Prioritization for Unconfigured Peers 6 10 Enabling Protocol Prioritization for All DLSw Peers 6 11 Global DLSw PP Parameters Defaults Window 6 12 Peer Queue Configuration Window ceeccccceeeeecceeeeseeeceeeeseseeceeeeeneeees 6 16 Add Edit Delete Queues Window eeeeeeennnnen 717 Add Gueuse VIRI uus peak reip D ir ANA A hoa Mobi 6 17 de pe ice RETI ISI EE TE E 6 18 Peer Queue Configuration Window with Both Default and Peer Specific Configurallofis Juice tripartita un 6 19 Peer Queue Configuration Window essssseeeesess s 6 20 DLS PrioritWOutbound Fillers WIDOION 13 5 eer orn 6 23 Filter Template Managemen
68. 3 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Backup Hold Down Time sec 120 0 to 2147483647 Specifies the time to wait in seconds after the primary peer is declared unreachable before the local router initiates a TCP connection to the backup peer The hold down time ensures that the primary peer has enough time to respond to a TCP connection request before the local router initiates a TCP connection to the backup peer Accept the default 120 or click on the Values button and specify a different value 1 3 6 1 4 1 18 3 5 1 5 15 1 8 Backup Start Time hhmm 1 0 to 2400 Specifies the start time when a configured backup peer is available During this time period the local router can establish a TCP connection with this backup peer if the primary peer is unreachable Type the start time in hhmm format where hh is hours and mm is minutes For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight Type 0 to disable the Backup Start Time parameter 1 3 6 1 4 1 18 3 5 1 5 15 1 9 303523 A Rev 00 5 75 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Backup End Time hhmm 2400 1 to 2400 Specifies the end time when a configured backup peer is available During this time period the
69. 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enable XID PassThru Disable Enable Disable Specifies whether XID is to be passed through to SDLC when the host is connected to Token Ring and the remote is SDLC This parameter is used for PU2 1 circuits Accept the default Disable or change to Enable 1 3 6 1 4 1 18 3 5 1 5 12 1 19 Device Activation Seq Local Device First Local Device First Peer First Specifies the sequence of activation for SDLC PU2 0 fixed format primary devices LocalDeviceFirst specifies that DLS establishes a connection with the SDLC End Station first Once the local device responds successfully DLS then starts up the SSP connection to the peer PeerFirst specifies that DLS starts the SSP connection first and contacts the SDLC End Station only after receiving a CONTACT message from the peer Accept the default Local Device First or change to Peer First 1 3 6 1 4 1 18 3 5 1 5 12 1 12 Deleting a DLSw Local Device Entry To delete a DLSw Local Device entry from the router configuration start at the DLS Local Device Configuration window refer to Figure 5 28 1 2 Select the DLSw local device to delete Click on Delete Editing a DLSw IP Multicast Entry To edit a DLSw IP multicast entry begin at the Configuration Manager window
70. 303523 A Rev 00 5 44 Configuring DLSw Services DLSw SAP Configuration 0x000 LETE 0x004 Add 0x008 OxOOC Delete Apply Values Ei 3 z SAP Window Figure 5 16 SAP Addresses in the DLSw SAP Configuration Window Adding a DLSw SAP Table Entry To add a new SAP Table entry begin at the DLSw SAP Configuration window 1 Click on Add The DLSw SAP Parameter window appears Figure 5 17 DLSw Sap Parameter Cancel OK Values Help a Figure 5 17 _ DLSw SAP Parameter Window 5 42 303523 A Rev 00 Editing DLSw Parameters 2 Type the 0x prefix and then enter a hexadecimal value for the SAP parameter Valid SAP addresses include even values 00 04 to EC and FO 3 Click on OK This saves your entry to the router configuration file The DLSw SAP Configuration window reappears refer to Figure 5 16 with the new entry added to the list of existing DLSw SAPs 4 Repeat Steps 1 through 3 for each SAP that you want to add 5 Click on Done The Configuration Manager window reappears Following is a description of the SAP parameter Parameter SAP Default None Options A valid even SAP address 00 to FO in hexadecimal format Function Specifies the destination SAP address associated with a communication subsystem on a remote device for example on a PC or host Instructions Begin the address with Ox and type the SAP address associated with a specific com
71. 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Figure 5 23 Figure 5 24 DLSw Basic Global Parameters Window eee 4 6 DLSw Basic Global Parameters Window for SRB susss 4 9 Frame Relay SNA Connection Window 0 ccsccccceessccceeeeeseeeeeeeneeees 4 10 DLSw Basic Interface Parameters Window sseessss 4 11 DLSw Basic Interface Parameters Window for SRB 4 12 LLC2 Frame Relay Mappings Window ecce cirea 4 13 LLC2 Frame Relay Mapping Add Window eeeeeeeeeese 4 13 SDLC Ling Parameters WINDOW t ritirare tide tensa dnte leta dads 4 15 i r Frolocols Window M 4 19 DLS Local Device Configuration Window eese 4 20 Local Device Configuration WIMKOW i cissnniicccnrrvarccectvoanconetvereiionmmrcaciae 4 21 Canhouration Manager VIIEIGDAEC arcieri Heidi ua rd re a qr ier bec 5 3 DLSw Basic Global Parameters Window sssssses 5 4 DLSw Basic Interface Parameters eeseseeeeeenene 5 7 Edit DLSw Global Parameters Window eeeeeceeeeeee 5 9 DLSw Interface Configuration Window ssesseessesssss 52298 Carout Ui m 5 25 thesi etel sca aee 5 26 CUCU reu dios R
72. 50 AS 400 056 6150 05C OS 2 EE 05D WSP 05E PC 3270 061 RS 6000 071 Subarea FFF Parameter IDNUM Default None Options Any 5 digit hexadecimal value from 00000 to FFFFF for T1 0 or T2 0 nodes Function Specifies the ID number which must match the host s IDNUM parameter value that identifies incoming connection requests This parameter is used with the PU Type IDBLOCK and XID Format parameters to determine the station XID value Instructions Obtain the configured value at the host from VTAM or other host MIB Object ID operating system for this device Type a 5 digit hexadecimal value from 00000 to FFFFF for T1 0 or T2 0 nodes N A 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID XID Format None FIXED VARIABLEI VARIABLE2 Specifies the format of the XID I field This parameter is typically set to FIXED for PU 2 0 devices VARIABLE 1 for PU 1 0 devices and set to VARIABLE2 for PU 2 1 devices Click on Values and select one of the following options FIXED Fixed format most often used for PU 2 0 devices e VARIABLE Variable format for T1 0 T2 0 T2 1 to T4 T5 node exchanges mostly used for PU 1 0 devices e VARIABLE Variable format most often used for PU 2 1 devices for T2 1 to T2 1 T4 T5 node exchanges N A Source Virtual MAC
73. 523 A Rev 00 Troubleshooting DLSw SSP XID frame rcvd in LLC The type of frame received XID and where it was received LLC SDLC conn 30927f70 The unique connection identifier for this DLSw circuit It will correspond to the correlator described in the DLSw RFCs state 4 CIRCUIT ESTABLISHED as listed in the DLSw state table refer to Table C 3 flag 201 Bay Networks use only DLSw Session Setup Before configuring DLSw you should be familiar with how DLSw establishes sessions between network endpoints To establish SNA or NetBIOS sessions between endpoints devices Bay Networks routers with DLSw enabled execute the following sequence of events e Upon receiving a TEST POLL or similar frame from an attached endstation the receiving slot performs the following Converts the TEST POLL frame into an SSP CANUREACH command Searches the appropriate cache to determine if the remote location is known If the remote location is already in the cache the CANUREACH is forwarded only to this remote location If the remote location is not in the cache DLSw forwards the CANUREACH to all remote routers specified in the DLSw Peer IP Table if this table exists Forwards the packet to all other slots defined in the DLSw Slot Table e Upon receiving a CANUREACH frame a DLSw slot Forwards the frame to all other slots defined in this router s DLSw Slot Table Converts the CANUREACH frame back to
74. 7 34 00E 3774 011 3x74 017 3276 018 8775 019 S 1 021 S 38 022 5520 031 5280 032 PC SRJE 03D S 36 03E 4680 04D APPC PC 050 AS 400 056 6150 05C OS 2 EE 05D WSP 05E PC 3270 061 RS 6000 071 Subarea FFF 303523 A Rev 00 4 25 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID IDNUM None Any 5 digit hexadecimal value from 00000 to FFFFF for T1 0 or T2 0 nodes Specifies the ID number which must match the host s IDNUM parameter value that identifies incoming connection requests This parameter is used with the PU Type IDBLOCK and XID Format parameters to determine the station XID value Obtain the configured value at the host from VTAM or other host operating system for this device Type a 5 digit hexadecimal value from 00000 to FFFFF for T1 0 or T2 0 nodes N A Note IDBLOCK and IDNUM required for PU 1 0 or 2 0 devices only must match the same values on the host The 3 digit IDBLOCK and the 5 digit IDNUM may be defined on the host as a single 8 digit XID Parameter Default Options Function Instructions MIB Object ID XID Format None FIXED VARIABLEI VARIABLE2 Specifies the format of the XID I field This parameter is typically set to FIXED for PU 2 0 devices VARIABLE 1 for PU 1 0 devices and set to VARIABLE for PU 2 1 devices Enter one of the following options e FIXED Fixed format most often use
75. BCN Synchronous Interface Cables Cable Description Modem No Modem 7215 15 pin to male V 35 Modem 7255 15 pin to male RS 232 Modem 7221 15 pin to male X 21 Modem 7941 15 pin to female RS 232 No modem 7942 15 pin to female V 35 No modem AA0018003 44 pin to male X 21 No modem Table C 14 AN ARN ASN and EASF Synchronous Interface Cables Cable Description Modem No modem 7220 44 pin to male V 35 Modem 7224 44 pin to male X 21 Modem 7826 44 pin to male RS 232 Modem 7943 44 pin to female RS 232 No modem 7944 44 pin to female V 35 No modem AA0018004 15 pin to female X 21 No modem 303523 A Rev 00 C 29 Configuring DLSw Services Table C 15 Octal Sync Interface Cables Modem No Cable Description modem 7932 50 pin to male V 35 Modem 7934 50 pin to male RS 232 Modem 7936 50 pin to male X 21 Modem 7945 50 pin to female RS 232 No modem 7946 50 pin to female V 35 No modem AA0018005 50 pin to female X 21 No modem Table C 16 Male No Modem Cables Cable Description Router 7218 15 pin to male RS 232 BLN BCN 7219 15 pin to male V 35 BLN BCN 7833 44 pin to male RS 232 AN ASN 7834 44 pin to male V 35 AN ASN C 30 303523 A Rev 00 A acronyms xxi address learning capabiliti
76. C 5 Configuring DLSw Services Event Code 16 15 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 16 State change in connect conf conn 30927f70 oldstate 4 new state 3 This message describes major state changes connect_conf The routine processing the frame It is probably a name corresponding to the type of event causing the state change conn 30927f70 The unique connection identifier old state 4 new state 3 The actual state transition occurring Event Code 17 4 04 25 95 22 43 00 DEBUG SLOT 1 DLS Event Code d f LLC test frame received This message indicates that DLS received a specific frame type test Event Code 36 38 04 25 95 22 43 17 DEBUG SLOT 1 DLS Event Code 36 Unexpected protocol action state 11 event 10 conn 30927f70 This messages shows that an illegal or unexpected event occurred Although this does not always indicate a problem with the software there could be a problem with the timer settings configured on each DLSw router If the condition persists or causes improper operation troubleshooting may be necessary state 11 DISCONNECTED event 10 INFOFRAME Received conn 30927f70 The unique connection identifier Event Code 45 10 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 45 SSP XID frame rcvd in LLC conn state flag 30927f70 4 201 This message describes the receipt of an input frame from either TCP or the DLC C 6 303
77. CP IP aM Host Router A Router B Terminal SDLC PU 2 0 Router B log file message number s SDLC circuit active DLSw activates 4 CANUREACH Test P Test F gt ICANREACH amp REACHACK a amp XIDFRAME NULL a amp NULL XID P 481 NULL XID F 9 XIDFRAME NULL amp XIDFRAME T2 482 it 483 SABME ___3 gt 484 X UA amp RNR CONTACT 3 4 UA amp CONTACTED DLS0033A Figure C 2 Sample DLSw SDLC Network Connection Sequence 303523 A Rev 00 Troubleshooting DLSw Reviewing the Network Connection Sequence This section describes the debug event messages that Router B see Figure C 2 logs when it connects with Router A Each message begins with a number that you can use to reference the network activity shown in Figure C 2 SDLC becomes active on the circuit and DLSw notifies SDLC that it is configured on the circuit SDLC processes the DLSw notification and sends a message indicating successful registration DLSw attempts to contact the host with a CANUREACH frame Router B sends the CANUREACH to Router A Router A forwards Test P frame to the host 244 07 12 95 08 46 07 DEBUG SLOT 1 SDLC Event Code 8 s
78. CP Inact Time For information about the parameters refer to Chapter 3 Flow Control DLSw uses the following three flow control mechanisms to provide reliable end to end delivery of packets e LLC2 flow control TCP flow control e DLSw RFC 1434 fixed and RFC 1795 adaptive pacing TCP and LLC2 continue to assert flow control until congestion clears on a given TCP connection The default settings for system parameters relevant to LLC2 and TCP flow control are suitable for the majority of your DLSw service requirements LLC2 Flow Control The LLC2 protocol interface provides a bidirectional window and a SAP credit allocation that together manage flow control on individual LLC2 connections between the router and LAN attached SNA or NetBIOS systems 303523 A Rev 00 2 11 Configuring DLSw Services The SAP window attempts to limit the number of outstanding frames queued for transmission to a remote endstation from a local endstation at this SAP address as follows 1 As the local endstation sends frames that the remote endstation has yet to acknowledge a counter on the remote DLSw switch increments 2 When this counter reaches half the value specified in the SAP Window parameter the remote DLSw switch sends a flow control indication back to the local DLSw switch This step is actually part of DLSw RFC 1434 fixed flow control 3 The local DLSw switch sends RNRs receiver not ready to the local endstation to control t
79. Configuration Mode local SNMP Agent LOCAL FILE File Name tmp mnt bne dlsw cfg Model Backbone Link Node BLN MIB Version x13 00 Ar CTHEE Used Unused Description Connectors 5300 Quad Sync DI COM2 COM3 5405 Dual Ethernet XCYR2 5250 Dual Port El F1 1 EmptyS5Slt EE CONSOLE po Eee Ss Figure 5 1 Configuration Manager Window Editing DLSw Basic Global Parameters To edit DLSw basic global parameters begin at the Configuration Manager window Figure and then 1 Select Protocols gt DLSw gt Basic Global The DLSw Basic Global Parameters window appears Figur 303523 A Rev 00 5 3 Configuring DLSw Services RI Cancel OK Values Help Reject Unconfigured Peers ACCEPT RFC Version RFC1434 NetBIOS Support NO Peer IP Address add only Figure 5 2 DLSw Basic Global Parameters Window 2 Edit the parameters that you want to change 3 Click on OK This saves your changes and returns you to the Configuration Manager window 5 4 303523 A Rev 00 Editing DLSw Parameters DLSw Basic Global Parameter Descriptions This section describes the DLSw global parameters that you can customize from the DLSw Basic Global Parameters window Parameter Default Options Function Instructions MIB Object ID DLSw Virtual Ring ID None Any valid unassigned ring number from 1 to 4095 0x001 to OxFFF in hexadecimal format Specifies a standard ring number
80. Configuring SDLC Services for information about the parameters in this window 303523 A Rev 00 5 59 Configuring DLSw Services e To add a local device start at the Configuration Manager window and select the connector to which you are adding a local device Select Edit Circuit and then select Protocols gt DLSw gt Local Devices The DLS Local Device Configuration window 5 29 appears with the Add button DLS Local Device Configuration testnet 0x04 S51 Delete Apply Link Details Values Help hA Disable ENABLE DLSu Mode PRIMARY PU Name testnet PU Type IDBLOCK 3 hex digits IDNUM 5 hex digits Figure 5 29 DLS Local Device Configuration Add Window e Ifyou are finished working with the local device parameters click on Done to return to the Configuration Manager window 5 60 303523 A Rev 00 Editing DLSw Parameters DLSw Local Devices Parameter Descriptions This section describes the DLSw Local Devices parameters that you can customize from the DLS Local Device Configuration window Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Link Station Address hex None Any valid hexadecimal link station address from 0x01 to OxFE Specifies the address of the link station This parameter must match the polling address defined in the SDLC attached device Type Ox followed
81. DLSw Basic Global DLSw Virtual Ring ID Frame Relay Parameters DLSw Basic Interface Parameters LLC2 Frame Relay Mapping Add For dual switch DLSw Peer IP Address For dual switch DLSw Slot IP Address DLCI Remote MAC Local MAC Frame Relay Bridged SNA RFC 1490 LLC over SRB BNN RFC 1490 or BAN LLC SRB DLSw Basic Global Parameters DLSw Basic Interface Parameters Select BAN SR Internal LAN ID SR Bridge ID DLSw Virtual Ring ID For dual switch DLSw Peer IP Address add only SR Interface Ring ID For dual switch DLSw Slot IP Address 303523 A Rev 00 Configuring DLSw Services Table 4 1 DLSw Startup Screens and Required Parameters continued Network Interface Site Manager Screen Required Parameters Options QLLC QLLC Mapping Parameters DLSw Basic Global Parameters DLSw Basic Interface Parameters Map Entry Adjacent DTE DCE X 121 Address Adjacent MAC Address Partner DTE DCE X 121 Address Partner MAC Address DLSw Virtual Ring ID For dual switch DLSw Peer IP Address For dual switch DLSw Slot IP Address APPN Boundary Function APPN Local Node Parameter e APPN Configuration Parameters DLSw Basic Global Parameters DLSw Basic Interface Parameters APPN Advanced Global Parameters e VCCT Configuration Parameter Local Node Name MAC Address SAP DLSw Virtual Ring ID For d
82. DLSw Paths Multiple DLSw Peers on a LAN Memory Requirements e TCP Considerations Flow Control e DLSw Prioritization e Protocol Prioritization e Backup Peers DLSw and Other Subsystems A DLSw network configuration uses the services of other network subsystems When you select DLSw on an interface the router software automatically selects these required subsystems In some configurations the software requires that you edit the parameters associated with these subsystems Some parameters have default values that you can either accept or edit To simplify the editing of additional parameters from multiple subsystems the software combines these parameters with the DLSw configuration screens 303523 A Rev 00 2 1 Configuring DLSw Services Selecting DLSw may enable the following subsystems e A data link control subsystem such as LLC2 for LAN media and Frame Relay SDLC QLLC or APPN Boundary Function e SRB or bridge subsystems e TCP and IP subsystems dual switch only where DLSw uses TCP IP to ensure reliable data delivery Additionally when you enable DLSw for the first time on a Bay Networks router the software automatically displays a set of DLSw screens These screens display parameters that DLSw requires before it can successfully communicate on the network These parameters include e DLSw global e DLSw interface e Slot table Combining DLSw and SRB A router running
83. DLSw Peer Configuration window refer to Figure 5 10 and then 1 Click on Add The second DLSw Peer Configuration window appears Figure 5 11 5 32 303523 A Rev 00 Editing DLSw Parameters 2 Enter a valid IP address for the Peer IP Address parameter Note Do not enter the IP address of any DLSw peer slot that resides in the local router Enter one IP address for each remote peer router Cancel OK Values Help Transport Type UNKNOWN Figure 5 11 Add DLSw Peer Configuration Window 3 Specify the Transport Type 4 Click on OK This saves the new entry The DLSw Peer Configuration window reappears refer to Figure 5 10 with the new entry in the list of existing peers 5 Click on Done The Configuration Manager window reappears Descriptions of the Peer IP Table parameters follow 303523 A Rev 00 5 33 Configuring DLSw Services Parameter Peer IP Address Default None Options Any valid 32 bit IP unicast address in the form network host using dotted decimal notation The valid ranges are 0 0 0 0 through 223 255 255 255 and 240 0 0 0 through 255 255 255 255 Function Specifies the IP address of a remote DLSw peer Adding this address to the DLSw IP Peer Table defines a configured peer to the local router Configured peers receive all DLSw related broadcast frames from the local router Instructions Type the IP address at which the configured peer should receive all
84. DLSw SOFVIGB cccciscicscctnttraaadseiietaadsacartannaudartpaasiianlaasasmmiebanainiaets 3 2 Single Switch Configuration Requirements sss 3 3 DLSw Basie Global Parameters cosi dado tede d des beide oie Und Pe Dd RU tut aa did ne CR ACE LS Vinual PUG ID ee M 3 3 RG WPS IOI M Reubesenn and 3 3 NaBIOS ONT ee eaniwsatedamauersaddueraanceniuumancnaiwaetedddecetaieetees 3 3 DLSw Advanced Global Parameters 5 a eere a FREE Rr cc RP ERI T RE FREE 3 3 aan PTE PA eT 3 4 Max SIDS SSS IONS M 3 4 DU SAP TIOE er nan ee 3 4 Adding Dual Switeh DLSW Services cic sioseenreiiaasbornesnaidoxeenradvoneeberdiopsbeeialosbornradeoxoearniion ER TR Dual Switch Configuration Requirements eeeesseeeceeseeeeeeceen mena enar aiina 3 7 DLSw Basic Global and Basic Interface Parameters sss 3 7 DLSw Advanced Global Parameters 12i pir hrrirada debe me E RE o tod gore x Ia des tee RE dro IR TOP VEU SIZE Locccisesriizal rica URS EEpApPa RR E He PERRO AE E raa M pa RRREES 3 8 PESDA LIBER sade deities anni i bons cer Mua aD nh toad 3 8 Reject Unconfigured Poors 2uiao ance panes dme bud ut bt inns uu E pun qi Un panda UM reves dada id 3 9 AA Dae AUS carae qutd ar oq tdv els cid eb Oi actA o VE REED 3 9 TOF nre mr EE goMos Slot Table e n 3 10 DLSW Peer IP ISBNS fece 3 12 Conngutred Poels os e OT ESSI x liis cU 3 13 Eca Tadao o cicer a A E Ex QU
85. DLSw can communicate with a router running in an SRB configuration Multiple SRB networks can be interconnected locally or across a TCP IP backbone using DLSw Figure 2 1 DLSw with SRB allows up to 13 total hops This means that seven hops are allowed on each side of the DLSw network with one hop reserved exclusively for DLSw All other rules for configuring SRB networks using Bay Networks routers apply For detailed information on SRB refer to Configuring Bridging Services 2 2 303523 A Rev 00 DLSw Implementation Notes SESE TCP IP E network CRD B e 9 E DLSw capable routers Q KEY R Ring SRB segment r B Bridge DLS0009A Figure 2 1 DLSw Capable Routers on an IP Backbone For Frame Relay networks to use SRB you must configure the DLSw router for BAN to use source route encapsulation Figure 2 2 illustrates a sample DLSw and SRB network 303523 A Rev 00 2 3 Configuring DLSw Services 8 SS Front end processer 4 Local termination at DLSw interfaces only 3274 CJ I Frame Relay or other SRB networks Router A LLC2 LLC2 Figure 2 2 e gt DLS0026A Sample DLSw and SRB
86. E Novell and SDLC Link Servers 10 CLNP ISO OSI 20 34 BPDU 42 X 25 over 802 2 LLC2 7E XNS 80 Nestar 86 Active station list 8b ARP 98 SNAP Subnet Access Protocol AA Banyan VIP BC Novell IPX EO CLNP ISO OSI EC IBM NetBIOS FO LAN Manager F4 F5 Remote Program load F8 UB FA IBM RPL FC ISO Network Layer FE LLC broadcast FF 303523 A Rev 00 Appendix C Troubleshooting DLSw This appendix provides the following information about diagnosing and troubleshooting DLSw networks specifically Viewing the DLSw Log Enabling Extended Logging Using and Decoding the DLSw Log DLSw Session Setup Establishing DLSw LLC Connections Establishing DLSw SDLC Connections Disconnecting from the Network Troubleshooting DLSw Verifying the WAN Cabling This appendix is for network administrators who understand SNA and DLSw Because DLSw operation involves the complex interaction of multiple subsystems administrators should also be familiar with SDLC TCP and LLC Viewing the DLSw Log You view the log file containing Bay Networks event and debug messages using the Bay Networks network management software Site Manager the Bay Networks command line interface Technician Interface or any compatible third party network management software 303523 A Rev 00 C 1 Configuring DLSw Services For information about viewing events and messages using Site Manager or a compatible third party
87. EXCLUSIVE REMEDIES AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Licensee is responsible for the security of 303523 A Rev 00 iii its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files data or programs 4 Limitation of liability INNO EVENT WILL BAY NETWORKS OR ITS LICENSORS BE LIABLE FOR ANY COST OF SUBSTITUTE PROCUREMENT SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES RESULTING FROM INACCURATE OR LOST DATA OR LOSS OF USE OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THE PERFORMANCE OF THE SOFTWARE EVEN IF BAY NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT SHALL THE LIABILITY OF BAY NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO BAY NETWORKS FOR THE SOFTWARE LICENSE 5 Government Licensees This provision applies to all Software and documentation acquired directly or indirectly by or on behalf of the United States Government The Software and documentation are commercial products licensed on the open market at market prices and were developed entirely at private expense and without the use of any U S Government funds The license to the U S Government is granted only with restricted rights and use duplication or disclosure by the U S Government is subject to the res
88. Ehub ck nbn AEn C 17 Table C 6 DLSw Configuration Troubleshooting eere nnn nnno oat O22 303523 A Rev 00 xvii Table C 7 DLSw Interface Troubleshooting 2i ete tnt tine eren inne C 23 Table G8 TOP Ee RE C 24 Table O SNXATrIOUDIBGSBODU M iiuissciosccsue esca comte cc case nedeatmarciereioeenemneaniinenion C 25 Table C 10 NetBIOS Troubleshooting ssesssssseeeeeseeenmeen nennen C 26 Tabe Cii LLG ToublosHbOlll qonsiqisiiscedivtepisuExktaprp I Enti rH CERO Peu eUEd pa rA dS C 27 Table C 12 SDLC TroublestiOOtlW isses eene tutti e tue etn ca rtp pea da esaia C 27 Table C 13 BLN and BCN Synchronous Interface Cables ssssse C 29 Table C 14 AN ARN ASN and EASF Synchronous Interface Cables C 29 Table C 15 Octal Sync Interface Cablgs iscesieenere took tta cibi o a sepe esa nk FUB PAL ETUR C 30 Table C 16 Male No Modem Cables 1 esee ecu ttnka ita RR sana RUE nb XAR C 30 xviii 303523 A Rev 00 Preface This guide describes Data Link Switching DLSw and what you do to start and customize DLSw services on a Bay Networks router Before You Begin Before using this guide you must complete the following procedures For a new router e Install the router see the installation guide that came with your router e Connect the router to the network and create a pilot configuration file see Quick Starting Routers Configuring BayStack Remote
89. Entry sese 5 51 Editing DLSw Default MAC Peer IP Table Parameters 2 sceeceeeeeeeeeeeeeeeneneeees 5 52 Adding a DLSw Default MAC Peer IP Table Entry 5 54 Editing a DLSw Default MAC Peer IP Table Entry eene 5 55 Deleting a DLSw Default MAC Peer IP Table Entry eeeeeeeeeeeees 5 57 Editing DLow Local Devices Parameters oiscicisisssetecsdsssccctadsancusorisdsnsneriadonnonecdisevenetaine 5 58 DLSw Local Devices Parameter Descriptions eeeeecesseeeeceeeee 5 61 Deleting a DLSw Local Device EmMry 2n exi ple en ERR I erokinpu Bekk CE Lame e REL rtg BEA D 5 71 Editing a DLSw IP Moncasi ENUY Lauooeedttbveieddtberedbetevi ua dabt ROCHE het dad vex cute flea SERE 5 71 Editing DLSw Traffic Filters and Pratova Prioritization PE NUTUS 5 76 storing OL re fom a cc Ree 5 76 303523 A Rev 00 ix Chapter 6 Using DLSw Prioritization Protocol Prioritization Quarles sicciesccsscesaceasdcerdtedaceraieteacesigeiond dole in anai eai 6 1 Types qUPRHIOCOUPHOIERIDE serraria anaes EDGE Rn AGREE 6 2 DLSW Priority QUCUES Net e Default and Peer Specific DLSw Queues 6 3 Tho uad o Mm 6 3 plages ce EN IL aee NET 6 4 The DedueunG PIOS tem re 6 4 The Deguene MIST UNES 6 5 Weighted Me Tr ree 6 5 Tunng DL Sw FProlocol PEIBELBESUEDE screen eta ars d a aa nep RR 6 7 DLSw Priority Queues and Co
90. Function Instructions MIB Object ID SAP Window 10 6 to 200 Specifies the maximum number of unacknowledged LLC2 frames that the local endstation DLSw switch accepts for forwarding to the remote endstation See the section Flow Control in Chapter 2 for more information Enter a SAP window size that is appropriate for your network configuration and requirements Specifying a larger size dedicates more buffer space to a particular SAP thereby improving performance on that SAP Specifying a smaller window size reduces buffer size and decreases performance on that SAP 1 3 6 1 4 1 18 3 5 1 5 4 1 3 Note The default value of 10 frames is based on the commonly used value of 7 plus additional frames to accommodate possible differences in timing between the router and the endstations Deleting a DLSw SAP Table Entry To delete a SAP table entry begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt SAP Table The DLSw SAP Configuration window opens Figure 5 19 Select the SAP Table entry to delete Click on Delete The system software deletes the entry you selected and removes the entry from the DLSw SAP Configuration window 303523 A Rev 00 5 45 Configuring DLSw Services Delete Apply Values Help pl _ at SAP Window Figure 5 19 Deleting a SAP Table Entry 4 Click on Done This completes the deletion procedure and
91. Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Multicast IP Address 224 0 10 0 Any valid IP address specified in dotted decimal notation The valid range is 224 0 1 0 through 239 255 255 255 Specifies the multicast IP address of this entry Enter the appropriate IP address 1 3 6 1 4 1 18 3 5 1 5 15 1 3 Slot Depends on the number of slots in the router For a BLN the default is 00000 Depends on the number of slots in the router Specifies the slots that you want to receive and transmit multicast data Click on the Values button Select the slots that you want to receive and transmit multicast data For example if you select Slots 2 and 3 ina BLN then the value in the Slot field appears as 01100 1 3 6 1 4 1 18 3 5 1 5 15 1 4 Multicast IP Slots The value or values you selected for the Slot parameter Depends on the number of slots in the router Specifies the slots that you want to receive and transmit multicast data Accept the value you entered at the Slot parameter on the second DLSw Multicast Configuration window or click on the Values button and select different slots 1 3 6 1 4 1 18 3 5 1 5 15 1 4 4 38 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function
92. LC 2 11 TCP 2 12 Frame Relay mapping addresses 4 12 Frame Relay support 1 22 G global parameters DLSw IP Virtual Ring 5 12 DLSw NetBIOS Support 5 6 DLSw Reject Unconfigured Peers 5 6 DLSw RFC Version 4 8 5 6 5 15 DLSw Virtual Ring ID 4 7 5 5 Enable 5 10 Initial Pacing Window 5 18 KeepAlive Retries 5 20 KeepAlive Retry Timer 5 19 KeepAlive Time 5 19 MAC Cache Age 5 14 Max Slot Sessions 5 13 Maximum Package Size 5 16 Multilslot Broadcasts 5 17 NetBIOS Fallback Time 5 21 NetBIOS Session Alive Filter 5 18 Packaging Threshold 5 17 Packaging Timeout 5 16 Reject Unconfigured Peers 5 15 SNA Fallback Attempts 5 20 TCP Inact Method 5 22 TCP Inact Time 5 21 TCP Window Size 5 11 Virtual Ring MTU 5 13 IDBLOCK parameter 4 24 5 63 IDNUM parameter 4 26 5 64 Initial Pacing Window parameter 5 18 interface parameters DLSw Mode 5 24 Enable 5 24 Internal Clock Speed parameter 4 17 303523 A Rev 00 IP Address for TCP Connection parameter 5 40 IP Address parameter 4 11 5 8 5 38 IP multicast parameters Backup Config 4 39 5 73 Backup End Time hhmm 4 41 5 76 Backup Hold Down Time sec 4 40 5 75 Backup IP Address 4 39 5 74 Backup Max Up Time 4 40 5 74 Backup Peer Type 4 39 5 74 Backup Start Time hhmm 4 41 5 75 Multicast IP Address 4 38 5 72 Multicast IP Slots 4 38 5 73 Slot 4 38 5 73 IP multicasting configuring 4 36 IP using the circuitless IP address 5 36 K
93. LSw services 1 3 6 1 4 1 18 3 5 1 5 10 1 2 MAC Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer that can reach the remote SNA system or application identified by the MAC address in the same Default MAC Peer IP Table entry The router adds this IP address to the list of configured peers in the DLSw Peer IP Table Type the IP address of the remote DLSw peer that can reach the remote SNA system or application identified by the MAC address in the same Default MAC Peer IP table entry 1 3 6 1 4 1 18 3 5 1 5 10 1 3 Editing a DLSw Default MAC Peer IP Table Entry You can edit only the Default MAC Peer IP Address parameter in the Default MAC Peer IP Table To edit the DLSw MAC Peer IP Address begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt Default MAC The DLSw MAC Peer Configuration window appears Figure 5 26 Select the entry to edit Click on the Default MAC Peer IP Address parameter field and enter a new address 303523 A Rev 00 5 55 Configuring DLSw Services 4 Click on Apply This saves your change to the router configuration file 0x2a33bff1dc2e Add Delete Apply Values Help Default Mac Peer IP Address 198 42 61 6 Ie Figure 5 26 Saving a DLSw Default MAC Peer IP Table Entry 5 Click on Done The Configuration Manager
94. MAC Peer IP Table contains the list of all remote SNA systems and applications that you can access via DLSw connection services on the local router Each entry you define in the DLSw Default MAC Peer IP Table contains the IP address of a remote DLSw peer that can reach a target SNA system or application The target system or application has an associated Token Ring 802 5 MAC address which you also specify in the DLSw Default MAC Peer IP Table entry You add edit and delete DLSw Default MAC Peer IP Table entries in the DLSw MAC Peer Configuration window To access the DLSw MAC Peer Configuration window begin at the Configuration Manager window refer to Figure 5 1 and select Protocols DLSw Default MAC 5 52 303523 A Rev 00 Editing DLSw Parameters The DLSw MAC Peer Configuration window appears Figure 5 24 showing a list of Token Ring 802 5 MAC addresses associated with frequently accessed remote SNA systems and applications 0x2a33bff1dc2e Delete Apply Values Help pi 9 2 j Default Mac Peer IP Address 98 42 61 6 B Figure 5 24 DLSw MAC Peer Configuration Window Each entry in the list is associated with the IP address of the remote DLSw peer that can reach the target SNA system or application The IP address of the currently selected table entry appears in the Default MAC Peer IP Address parameter box 303523 A Rev 00 5 53 Configuring DLSw Services Addin
95. P addresses to one or more IP capable interfaces If required a single interface can support multiple IP addresses For example you might want to do this in large SDLC configurations because IP cannot be configured on SDLC interfaces For more information on configuring multiple IP addresses see Configuring IP Services Note You can use the circuitless IP interface address for one and only one DLSw capable slot Using the circuitless IP interface allows TCP connections for DLSw services on that slot to be less dependent on the availability of specific physical circuits or data links Bay Networks recommends that you set the Keepalive Time parameter to a nonzero value when using the circuitless IP address For more information about the circuitless IP interface refer to Configuring IP Services Note If you configure RFC 2166 you must specify the IP multicast address for the DLSw Slot Table Figure 3 4 shows a sample network with three routers running DLSw Although many options exist for the Slot Table this network uses the following values e Router A the central site router has three slots running DLSw as follows 3 10 303523 A Rev 00 DLSw Configuration Overview Slot 1 Represented by the circuitless IP address This provides the highest availability for Token Ring devices Slot 3 Represented by the IP address of the directly attached Frame Relay interface Slot 4 Represented by an IP add
96. P session to transport data Using a single full duplex TCP IP session instead of two half duplex sessions reduces the amount of time and memory required to establish the TCP connection RFC 2166 Multicast Support In addition to IP unicast broadcast services DLSw provides IP multicast support The capability to send and receive both IP multicast traffic and IP unicast traffic makes the Bay Networks implementation of DLSw fully compliant with RFC 2166 RFC 2166 is an implementation of DLSw that was developed by the APPN Implementors Workshop a consortium of vendors RFC 2166 provides Improvements for scalability by allowing The initial session establishment request CanuReach to be sent using Multicast IP Only single bi directional TCP connection to be used TCP connections to established and disconnected on demand and as needed e Reason codes with the HALT DL and HALT_DL_NOACK SSP messages to provide more diagnostic information Differences Between RFC 2166 and RFC 1795 The following comparison of RFC 2166 with earlier DLSw RFCs 1434 and 1795 shows how RFC 2166 reduces the amount of broadcast traffic on the network e Under RFCs 1434 and 1795 an end station an SNA or NetBIOS application that wants to establish a network connection first sends a DLSw SSP CanuReach or NETBIOS_NQ message to all routers that are part of the DLSw network In a large network with many end stations these connection attempts result
97. Parameters cccsscsissicssncisnacseciadearseixeaivonsadanaintoraanzane POO Table A 6 DLSw Slot IP Table Parameters iue cessccatucapev epxes ema saca Fred ES A 3 Table A 7 DLOWw SAP PAS Lun caseum xci cha aaa eA E Le tau tent DN D RE CR MURDER A 4 Table A 8 DLSw Default NetBIOS Peer IP Table Parameters A 4 Table A 9 DLSw Default MAC Peer IP Table Parameters ccccccecceeeseeeeeeeees A 4 Table A 10 DLSw Local Devices Parameters ccccccccccccssssececssssecessaeceeenssaaes A 5 Table A 11 DLSw Protocol Prioritization Parameters cccccccceeceeeeeeeeeeeeeeeeeeaes A 6 Table A 12 DLSw Multicast Configuration Parameters sees A 6 Table B 1 Predefined Outbound Filter Criteria Based on DLSw Header B 2 Table B 2 DLSw Reference Points for FID2 Frames esses B 3 Table B 3 DLSw Reference Points for FID4 Frames see B 3 Table B 4 Format for Specifying Source Routing MAC Addresses B 4 Table B 5 Functional MAC Adresses sssrinin B 5 Table B 6 SAP LOTEC uuaduxicxicQusistA diari aA ab bri REED Eod tus FU RUD B 6 Table C 1 Extended Logging Commands for Subsystems suuussss C 2 Table C 2 diste ccr PT C 3 Table C 3 DLSW State TBS dM OA Table C 4 DS EVENT TAG m E EO D E C 4 Table C 5 Common DLSW PEODIQOUEIS 1s sou Dame i rasta
98. R o 5 26 Edit DLSw interlace Window sistance enna 5 27 DLSw Peer Configuration Window cccccccsssccsseseecssecesseeeeesaeeeeeeeeees 5 28 Add DLSw Peer Configuration Window eccceeeesecceeeeeeeeeeeeeeenaes 5 33 BIET Slot Configuration WIndow fv 5 37 IP Address in DLSw Slot Configuration Window 5 97 Saving an Edited DESw Slot IP Address ocn rires 5 39 Deleting a DLSw Slot Table EP iiis aec tiere tn tini eet amc tnos 5 40 SAP Addresses in the DLSw SAP Configuration Window 5 42 DLSw SAP Parameter WINdOW 2o ee xut prt ean Ore LER RD TR 5 42 Saving the Edited SAP Window Setting sess 5 44 Deleting a SAP Table ETHEY iuuat ccce realiter scene ncn 5 46 DLSw NetBIOS Peer Configuration Window eese 5 47 DLSw NetBIOS Configuration Window see 9 48 Saving a DLSw Default NetBIOS Peer IP Table Entry 5 50 Deleting a DLSw Default NetBIOS Peer IP Table Entry 5 52 DLSw MAC Peer Configuration Window eeeeeeeeeeess 5 58 303523 A Rev 00 Figure 5 25 Figure 5 26 Figure 5 27 Figure 5 28 Figure 5 29 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 6 16 Figure 6 17 Figure 6 18 Figure 6
99. Specific Priority Queues You create the priority queue configuration for all configured and unconfigured DLSw peers using the Global DLSw PP Parameters Default window refer to Figure 6 6 You customize priority queues for particular configured DLSw peers using the Peer Queue Configuration window Note Peer specific queue configurations take precedence over the default DLSw priority queue configuration Priority Queues for a Specific DLSw Peer Begin by displaying the Peer Queue Configuration window 1 From the Configuration Manager window select Protocols DLSw Prot Prioritization Outbound Peer Queue Entries The Peer Queue Configuration window appears Figure 6 7 Note See the later section Using the DLSw Peer Configuration Window for another way to access the Peer Queue Configuration window 303523 A Rev 00 6 15 Configuring DLSw Services Dimi QrlszeXx OFS Dore 2 Default Queues Barca idths an Fp lig 3 3 3 Default Qisu Bard ii Uo zux QI 25X 2 27m Deo Seale Help Dorica Protocol Priority Has Deum Balter Mw Ducuc Size Figure 6 7 Peer Queue Configuration Window The Peer Queue Configuration window summarizes the priority queue status for all DLSw peers The scroll box lists each peer and indicates whether it uses the default or a specific queue configuration All of the DLSw peers in Figure 6 7 use the default queue configuration The par
100. Table Bay Networks provides two mechanisms for reducing the number of required entries in the DLSw Peer IP Table These are Broadcast peers e Unconfigured peers Broadcast Peers It is not necessary to enter more than one peer per remote router into the Peer IP Table The entry representing the remote router is the broadcast peer for that router Only broadcast peers normally receive broadcast frames from another router However all DLSw peers on a remote Bay Networks router can both receive and respond to broadcast frames that the broadcast peer in that router forwards internally 303523 A Rev 00 DLSw Configuration Overview Unconfigured Peers A Bay Networks router running DLSw can respond to requests from remote routers to initiate DLSw sessions even if the local router s Peer IP Table does not contain the remote peer definition When DLSw establishes a session to a remote slot DLSw dynamically adds the slot to the list of known peers Any remote DLSw peer that the router learns dynamically is an unconfigured peer A router s Peer IP Table does not list the unconfigured peers DLSw supports unconfigured peers only if you set the DLSw Reject Unconfigured Peers parameter to Accept When a local DLSw peer Bay Networks or otherwise receives a broadcast response from a non broadcast peer on a Bay Networks router the local peer opens a DLSw connection to the unconfigured peer Figure 3 5 shows a sample network of t
101. Table A 7 DLSw SAP Parameters Parameter Default SAP Window 10 frames SAP 0x004 0x008 0x00C Table A 8 DLSw Default NetBIOS Peer IP Table Parameters Parameter Default Default NetBIOS Peer IP Address None NetBIOS Name None NetBIOS Peer IP Address None Table A 9 DLSw Default MAC Peer IP Table Parameters Parameter Default Default MAC Peer IP Address None MAC Address None MAC Peer IP Address None 303523 A Rev 00 DLSw Default Settings Table A 10 DLSw Local Devices Parameters Parameter Default Disable Enable Link Station Address hex None DLSw Mode Primary PU Name None PU Type None IDBLOCK None IDNUM None XID Format None Source Virtual MAC hex None Source Virtual SAP hex None Destination MAC hex None Destination SAP hex 0x4 MAXOUT 7 MAXDATA 2057 Canureach Timer Timer2 30s Canureach Retries Retries2 4294967295 Link Station Timer 30s Link Station Retries 4294967295 SDLC Receive Credit 10 SDLC Transmit Credit 10 Enable XID Pass Thru Disable Device Activation Seq Local Device First 303523 A Rev 00 Configuring DLSw Services Table A 11 DLSw Protocol Prioritization Parameters Parameter Default Protocol Priority Disabled PP for Unconfigured Peers Disabled Max Queue Buffers for Unconfig 50 Peers Max Queue Size for Unconfig 16000 Peers
102. The VCCT CCT Configuration window opens Supply the slot and circuit number of the virtual circuit to which you want to add an APPN interface Click on Done The APPN Configuration window opens Supply a MAC address and an SAP for the interface as described in Configuring APPN Services Click on Done 303523 A Rev 00 4 35 Configuring DLSw Services Site Manager asks Would you like to configure Adjacent Link Stations on this port 10 Click on Cancel You return to the Configuration Manager window Disabling and Reenabling the Boundary Function By default the DLSw APPN boundary is enabled on the router You can use the following Site Manager procedure to disable and reenable it Begin at the Configuration Manager window 1 Click on Protocols The Protocols menu opens Click on DLSw The DLSw window opens Click on Boundary Function The Boundary Function window opens Click on Global The Edit VCCT Global Parameters window opens Set the Enable parameter Click on OK You return to the Configuration Manager window Configuring DLSw for IP Multicasting To configure DLSw for IP multicasting you must Configure DLSw to run in RFC 2166 multicast mode To do this set the DLSw RFC Version parameter from the DLSw Basic Global Parameters window Figure 4 1 to RFC 2166 Enable IGMP See Configuring IP Multicasting and Multimedia Services for instructions Supply an IP multicast gr
103. U EDS LES ose sino E EUR M Lc ecu Loft 3 14 Simplifying Me Peer IP TANG T 3 14 Multicast IP Eniios RFO 20GB cnsesrecneiiiia PRE PO EE REDGU PX DO va KR 3 16 Configuring SDLC Lines and Devices 1 ecessiiie erred rete rhd aepo Ped RF e bte ta gan tete da Eres tais T SDLC Line Par I MP 3 17 Lc DEUCES e ius stlarasbusmetucu des ucc eb amati qM cci M etu UH 3 17 303523 A Rev 00 vii COnnguring DLSWw ever Frame Rolay iussus iet der ras n ree dd d UP eli Rape 3 18 Boundary Network Node RFG 1490 ulciscuie ceu tan uan ntn a nk anat RR anticae 3 19 Boundary Access Node BAN 1 ucssecevazcusuue eaa casur e esas rebate vasca pacer Evae rcs 3 19 Configuring Predefined MACs and Names eese enne 3 20 Dynamically Learned Remote Systems esee nnne OOO Siatically Defined Remote Systems 1 pena cines deor kaaa cub E ea kN PU Fasc an ka dca 3 21 dps DLOW dx ei app q 3 22 sowie DLSw dicare RO OTT 3 22 Coniguring DLOW dr Up sccsccsdscrnnimsscenmenisaaginenaddnianinimethvrnineatiaimnnisiainnninents 3 23 Configuring DLSWw for IP TRTOTEIGEBI 22s aicess d iacussa d dicun dtu e o t Uer b A etr VE Geb diet tad kt 3 23 Chapter 4 Starting DLSw ciarting DESN SHE SN IBIBEGE ue pria idet iidem d ERR t px be pA GN EVA INC en 4 1 Slaton DLON Te Fr TIC cine damned mena eons Roane E Setting the DLSw Basic Global Parameters swisiicccccsstneccnscderaecdinamntrdiuanmeriacsenerunaaneres 4 5 Setting the SRB Basic Glo
104. a TEST POLL frame Forwards the TEST POLL frame to all interfaces on this slot which have DLSw enabled e Ifthe destination device resides on an attached LAN then this device responds by broadcasting a TEST RESPONSE message Upon receiving this response the remote router Caches the MAC address for SNA or name for NetBIOS in the appropriate table on the router 303523 A Rev 00 C 7 Configuring DLSw Services Converts the TEST RESPONSE packet into a DLSw ICANREACH frame Forwards the ICANREACH to the originating data link switch router e Upon receiving the ICANREACH the originating router Caches the MAC address or NetBIOS name and identity of the remote router in the appropriate table on the router Converts the ICANREACH back to a TEST RESPONSE frame Forwards the packet to the originating workstation At completion all routers and endstations can forward SNA and NetBIOS packets appropriately creating a logical session between endpoints Each slot on a Bay Networks router running DLSw functions as an independent data link switch The network administrator controls the packets forwarded to DLSw by specifying the appropriate SAPs in the DLSw SAP Table Establishing DLSw LLC Connections Table C 1 illustrates a sample dual switch DLSw network and the network packet exchanges transactions that occur when two DLSw routers connect to each other Connections generate debug even
105. age cost of the line Click on Values and select Enable or Disable Select Enable to start the NetBIOS session alive filter stopping session alive frame transmissions Select Disable to cancel the filter and continue session alive frame transmissions every 30 seconds 1 3 6 1 4 1 18 3 5 1 5 1 29 5 18 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range Function Instructions Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID KeepAlive Time sec 60 0 to 2147483647 The TCP KeepAlive Time parameter specifies how often the router sends a signal to the peer router to check that the peer router is working correctly and can receive messages You enable the parameter by specifying a nonzero value When a keepalive packet goes unacknowledged by the remote peer retransmission begins at the local peer router You should tune the keepalive interval based on the total time it takes to send and receive acknowledgment from the remote peer Since keepalive packets are sent only on idle lines increasing the keepalive interval may decrease the cost of an idle network In busy networks the keepalive interval is not necessary Frequent traffic for TCP transmission performs the same function as a keepalive setting Enter a value appropriate for the network in the range 0 to 2147483647 seconds We recommend that you set this parameter to the same valu
106. ameter boxes at the bottom of the screen show protocol prioritization as currently Disabled or Enabled for the selected peer and list that peer s queue configuration information queue buffers and size 2 Select the individual peer address on which to configure priority queues 3 Click on Queues in the Peer Queue Configuration window The Add Edit Delete Queues window appears Figure 6 8 6 16 303523 A Rev 00 Using DLSw Prioritization Figure 6 8 Add Edit Delete Queues Window 4 Click on Add The Add Queue window appears Figure 6 9 Des Bankjdrh Percent Figure 6 9 Add Queue Window 5 Enter a queue number The first queue must be QO You can number additional queues from 1 to 9 You do not need to number them in sequence although doing so may help you keep track of the queues on a peer 303523 A Rev 00 6 17 Configuring DLSw Services 6 Enter a bandwidth The bandwidth for QO must be greater than 0 You can assign any percentage between 0 and 99 to subsequent queues as long as the combined bandwidth for all queues totals 100 percent On low speed lines running NetBIOS you should allocate 20 percent of the total bandwidth due to endstation timing 7 Click on OK The Add Edit Delete Queues window reappears 8 Repeat Steps 3 through 7 until the total bandwidth is 100 percent Figure 6 10 shows a sample screen after adding queues fuk Edit Delete Figure 6 10 Configured Queu
107. and protocols supported 6 1 translation bridge support 2 7 Index 5 transparent bridge support 2 6 Transport Type parameter 5 29 5 35 U UDP explorer frames 1 5 3 13 unconfigured peers 3 15 V Virtual Ring MTU parameter 2 4 5 13 Ww weighted dequeuing algorithm 6 5 window size SAP 5 45 X XID Format parameter 4 26 5 65 Index 6 303523 A Rev 00
108. arameters are e Clock Source e Internal Clock Speed e Sync Line Coding For information about configuring SDLC line parameters refer to Chapter 4 Local Devices DLSw uses local device entries to define SDLC attached SNA physical units PUs to the router NetBIOS does not support SDLC attached devices To take advantage of integrated SDLC services in DLSw you must define the SDLC devices that you want to appear as natively attached to the LAN When you define such devices you map the devices to LAN MAC and SAP addresses You can add local devices at the following times e When you add SDLC to a synchronous circuit and add the DLSw protocol to that circuit e When you edit a synchronous circuit that already has SDLC and DLSw on it e When you edit DLSw interface parameters In this case the interface whose parameters you edit must already have at least one local device defined on it 303523 A Rev 00 3 17 Configuring DLSw Services Several local device parameters must match other entries in the router or in the attached SDLC device These include e Link Address hex e PU Type IDBLOCK and IDNUM e XID Format e Source Host MAC hex e Destination Host MAC hex e Source Virtual SAP hex and Destination Host SAP hex For information about these parameters refer to Chapter 4 For each local device that you add Site Manager creates a corresponding SDLC link station which is how SDLC sees the
109. ast IP network 2 IP Endstation 1 DVMRP O Tas IP multicast group address 224 0 10 0 1 TestP 2 CANUREACH_ex 3 TestP 6 TestF 5 ICANREACH ex 4 TestF 4 DLS0041A Figure 1 3 Multicast DLSw 303523 A Rev 00 Data Link Switching Overview When end station 1 generates an SNA TestP message the following steps occur 1 2 po M pm m cR Router receives the TestP message on slot 3 Router A multicasts a CANUREACH_ex message on slot 2 using the group address 224 0 10 0 Router B and C receive the CANUREACH ex message and forward the message to slot 3 configured with the IP multicast group address Router B sends a TestP message on slot 3 to host 1 Router C sends a TestP message on slot 3 to host 2 Host 1 responds to the TestP message by sending a TestF message Router B receives the TestF message on slot 3 Router B sends an ICANREACH ex message on slot 2 Router B sends this message in an IP unicast datagram Router A receives the ICANREACH ex unicast message on slot 2 and forwards it to DLSw slot 3 10 Router A sends a TestF message to end station 1 DLSw Single Switch and Dual Switch Services Bay Networks routers that you configure to support DLSw services can operate in two modes A DLSw single switch configuration involving a single local router with two or more interfaces configured for DLSw A DLSw
110. available or IP cannot reach it XID is incorrect Destination MAC address incorrect if LLC media is Ethernet the address needs to be in non canonical format First experience with new device Verify the status of the host and attempt to ping the target router Obtain correct XID values Verify that the destination MAC address is correct if the LLC media is Ethernet then flip the address format Obtain flows and traces and contact Bay Networks SNA stations fail in heavy network traffic Other traffic is taking too much time on the WAN DLC initiated termination of session Use protocol prioritization to provide more bandwidth to SNA Depending on the configuration refer to the LLC or the SDLC Troubleshooting table 303523 A Rev 00 C 25 Configuring DLSw Services Table C 10 NetBIOS Troubleshooting Problem Possible Cause Action Solution NetBIOS stations cannot connect over DLSw NetBIOS SAP not configured Excessive broadcast traffic on WAN Configure SAP OxFO in the DLSw SAP TAble Use traffic filters caches or network design to limit unnecessary NetBIOS traffic use protocol prioritization to provide more DLSw bandwidth on the WAN NetBIOS stations cannot keep sessions alive during data transfer PC session level timeout short WAN connectivity is lost or not rerouting fast enough Set the OS 2 IBMLAN INI file param
111. bal Parameters sse 4 8 Adding Source Routing Parameters for Token Ring EN EE 4 9 Adding Source Routing Parameters for Frame Relay BAN sss 4 10 Setting the DLSw Basic Interface Parameters sse 4 10 Setting the DLSw Basic Interface Parameters for SRB sssssssusssss 4 12 Mapping Frame Relay AUOOIeSSBS Lites pet ted entr FE Rr tu E Se OR REEL ee piRE 4 12 Adding SDLC Line Parameters and Local Devices sssssssssssssssssu A15 Configuring the DLSw APPN Boundary FUNCHION iuuenes 4 33 Conkgunng DLSw and APPIN uicina espina EURO eO URL ae D La ou ae 4 33 Creating a Virtual Circuit and Adding a DLSw Interface TP R ae Obtaining the Yirtual Circuit IEITBSI 1r rer arr RE Rr E rrr Fc ed 4 34 Adding an APPN Interface to an Existing Virtual Circuit 4 35 Disabling and Reenabling the Boundary Function cccccceessecceeeeeseeeeeeeeeeeees 4 36 Gonigurmg DLSw Tor IP Mtis ld dauern Dexter pni e REOHN XRR UPS BR Ded qg s hder 4 36 Chapter 5 Editing DLSw Parameters Using ihe Parameter Descriptions 2uastecadisierconi extras aae tae dpa aereas qut an a EORR abra 5 1 Accessing DLSW Paella qupecnt d Accs Addit red d Da OREL EC ER Lou dla URB d Ea PA KORR A 5 2 viii 303523 A Rev 00 Editing DESw Basic Global Parameters a ccsiccinieinuicensccacssinnauiaeseanined 5 3 DLSw Basic Global Parameter Descriptions
112. ber that you can use to reference the network activity shown in Figure C 1 The initial connection sequence begins when the terminal sends a Test P packet to Router B Router B sends a CANUREACH to Router A Router A forwards a Test P frame to the host 4 04 25 95 22 43 00 DEBUG SLOT 1 DLS Event Code 17 LLC test frame received The host computer returns a Test F frame informing Router A that it is available Router A then sends the ICANREACH frame to Router B Router B sends a Test F frame to the terminal 8 04 25 95 22 43 00 DEBUG SLOT 1 DLS Event Code 18 SSP ICANREACH in LLC frame received connection 30927f70 Router B returns a REACHACK acknowledgment frame to Router A The terminal then sends a NULL XID P frame to Router B Router B forwards an LLC XIDFRAME NULL to Router A Router A sends a NULL XID P to the host 9 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 17 LLC XID frame received The host returns a NULL XID F frame to Router A Router A forwards an XIDFRAME NULL packet to Router B Router B sends a NULL XID F to the terminal 10 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code 45 SSP XID frame rcvd in LLC conn state flag 30927f70 4 201 The terminal sends a NULL T2 P frame to Router B and Router B generates and sends an XIDFRAME T2 to Router A Router A sends an XID T2 P to the host 11 04 25 95 22 43 01 DEBUG SLOT 1 DLS Event Code ET LLC XID frame received
113. cache dynamically learn the MAC address and NetBIOS name of remote systems Local Bay Networks routers receive frames that contain information about the DLSw peer IP address of each remote system that uses DLSw services This information is learned from broadcast frames TESTs XIDs and NetBIOS generated by the remote endstations or applications The router stores this information in separate NetBIOS and MAC caches The router uses the learned IP address to locally specify the DLSw peer that can reach the desired endstation The cache is not used for forwarding traffic during the first LLC2 session but will be used in new sessions with that endstation You can set a timer value that determines when NetBIOS or MAC cache entries are removed from the router The timer parameters are NetBIOS Cache Age and MAC Cache Age When the cached entry goes unused for the specified cache age time or becomes unreachable to new queries it is removed from the cache and subsequent frames are broadcast to all configured peers The router refreshes a cache entry when DLSw services establish a connection to the NetBIOS or SNA system associated with that entry The router resets the appropriate Cache Age timer to its maximum wait interval 3 20 303523 A Rev 00 DLSw Configuration Overview Statically Defined Remote Systems To reduce DLSw broadcasts you can statically define the IP addresses of DLSw peers that can reach remote systems or applicat
114. ch type of network interface the Site Manager screens that appear for that interface and the required parameters that you must specify before DLSw can start Table 4 1 DLSw Startup Screens and Required Parameters Network Interface Site Manager Screen Required Parameters Options Ethernet DLSw Basic Global Parameters DLSw Basic Interface Parameters DLSw Virtual Ring ID For dual switch DLSw Peer IP Address add only For dual switch DLSw Slot IP Address Token Ring or other SRB DLSw Basic Global Parameters DLSw Basic Interface Parameters SR Internal LAN ID SR Bridge ID DLSw Virtual Ring ID For dual switch DLSw Peer IP Address add only SR Interface Ring ID For dual switch DLSw Slot IP Address SDLC SDLC Line Parameters DLSw Basic Global Parameters DLSw Basic Interface Parameters e DLSw Local Device Configuration Add All parameters required Clock Source Internal Clock Speed Sync Line Coding Cable Type RTS Enable DLSw Virtual Ring ID For dual switch DLSw Peer IP Address For dual switch DLSw Slot IP Address All parameters required continued 303523 A Rev 00 Starting DLSw Table 4 1 DLSw Startup Screens and Required Parameters continued Network Interface Site Manager Screen Required Parameters Options Frame Relay BNN RFC 1490 or BAN Select BNN Routed SNA LLC SRB RFC 1490 LLC over e
115. chnician Interface enter log fftwid eDLS s s ot no 303523 A Rev 00 Configuring DLSw Services For example f you are filtering events from Slots 3 and 4 enter log fftwid eDLS s3 s4 Make sure that the DLSw MTU size matches the synchronous line MTU size Unnecessary packet fragmentation can occur when these settings do not match Use the Technician Interface or the Statistics Manager to inspect the global SRB settings such as the internal LAN ID the group LAN ID and the bridge ID If you are using the Technician Interface enter get wfBrSr 0 Use the Technician Interface or the Statistics Manager to inspect the global DLSw settings such as the configured TCP window size and the total number of established DLSw sessions If you are using the Technician Interface enter get wfDIs 0 Make sure that the virtual ring ID for the IP cloud is unique and is consistent among all sites Use the Technician Interface or the Statistics Manager to inspect the state of all of the DLSw interfaces currently configured and the value of the instance field If you are using the Technician Interface enter get wfDIsinterfaceEntry 3 Use the Technician Interface or the Statistics Manager to inspect the state of all of the TCP connections If you are using the Technician Interface enter get wfTcpConnEntry 2 Make sure that all active TCP sessions are in an established state represented by the value 5
116. col prioritization on this peer and now want to reenable it 1 3 6 1 4 1 18 3 5 1 5 5 1 5 Max Queue Buffers 50 10 to 2147483647 Specifies the maximum number of packets in each of this peer s queues Enter a number of packets to increase or decrease the default buffer size of 50 packets 1 3 6 1 4 1 18 3 5 1 5 5 1 6 303523 A Rev 00 6 21 Configuring DLSw Services Parameter Max Queue Size Default 16000 Range 5000 to 2147483647 Function Specifies the maximum size of each of this peer s queues Instructions Enter a number of bytes to increase or decrease the default queue size of 16000 bytes MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 5 1 7 Creating DLSw Priority Filters Outbound traffic filters configured with the queue action priority filters determine which DLSw traffic is processed into priority queues To configure the DLSw priority filters begin by displaying the DLS Priority Outbound Filters window 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound PP Traffic Filters The DLS Priority Outbound Filters window appears Figure 6 13 Note See the later section Using the DLSw Peer Configuration Window for another way to access the DLS Priority Outbound Filters window 6 22 303523 A Rev 00 Using DLSw Prioritization El DLS Prioritu utbound Filters D OOIRIAAASSGULGN DDCCOPE eHHL OIN Apply Templat
117. configured queue limit 5 TCP transmits the packets 6 The sequence repeats at Step 1 Figure 6 1 illustrates weighted dequeuing 303523 A Rev 00 6 5 Configuring DLSw Services TCP requests packets from a DLSw Peer Wait for DLSw packets there packets in any of the DLSw Peer s queues there packets in the dequeue list Forward packets Divide the size with the lowest of each packet weighted score Es dd to TCP configured 96 o bandwidth Subtract the packet s time in Was the the queue to TCP request produce a satisfied weighted score Move the first oldest packet from each queue for this peer to the dequeue list Figure 6 1 Weighted Bandwidth Allocation 6 6 303523 A Rev 00 Using DLSw Prioritization Tuning DLSw Protocol Prioritization This section explains how congestion control and queue depth affect DLSw prioritization results for your network The sections Customizing the Default Queue Configuration and Customizing Specific DLSw Peer Queues later in this chapter show how to use Configuration Manager to configure these values DLSw Priority Queues and Congestion Control Because the router cannot clip DLSw traffic without breaking the DLSw session DLSw protocol prioritization includes an internal congestion control feature to e Temporarily save overflow packets in memory until the appropriate priority queue can handle t
118. cording to your network traffic needs Note The default priority queue configuration applies to all configured DLSw peers except those configured with a custom priority queue configuration Peer specific queue configurations take precedence over the default DLSw priority queue configuration Complete the following steps to edit the default DLSw protocol prioritization parameters 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound gt Global The Global DLSw PP Parameters Defaults window appears Figure 6 6 303523 A Rev 00 6 11 Configuring DLSw Services Global DLSw PP Parameters Defaults Protocol Priority PP FISABLED PP for Unconfigured Peers ENABLED Max Queue Buffers for Unconfig Peers 50 Max Queue Size for Unconfig Peers 16000 Default Bandwidths 00 01 Q9 60 40 0 0 0 0 0 0 0 0 Figure 6 6 Global DLSw PP Parameters Defaults Window 2 Edit the parameters that you want to change using the descriptions following this procedure as guidelines 3 Click on OK when you are finished editing parameters DLSw Protocol Prioritization Parameter Descriptions Use the following descriptions as guidelines when you configure parameters in the Global DLSw PP Parameters Defaults window 6 12 303523 A Rev 00 Using DLSw Prioritization Parameter Default Options Function Instructions MIB Object ID Protocol Priority PP Disabled
119. ct BAN source route encapsulation when you configure the Frame Relay network QLLC Support QLLC provides reliable transport for SNA devices connected over an X 25 network This support enables QLLC attached devices to connect to a non X 25 backbone and allows non QLLC devices to connect to an X 25 network Both single and dual switch DLSw networks can operate over X 25 links using QLLC For detailed information about configuring QLLC prior to adding DLSw single and dual switch services refer to Configuring X 25 Services DLSw APPN Boundary Function The DLSw APPN boundary function BF allows DLSw to provide remote communications via an IP backbone and provide access over this backbone from enterprise level applications using an APPN network The DLSw APPN boundary function is implemented within a central APPN network node The BF accepts traditional PU2 traffic supported by DLSw and routes it over APPN to the appropriate partner typically a mainframe based application DLSw APPN Network Configurations The DLSw APPN boundary function can reside wherever your APPN backbone network is located 1 24 303523 A Rev 00 Data Link Switching Overview In Figure 1 12 for example the DLSw APPN boundary function resides in an enterprise router located within the domain of the APPN mainframe or AS 400 data center The corporate network is an IP network PU2 0 VTAM host NN DLSw APPN U
120. d interchangeably However Bay Networks refers to DLSw Version 2 slightly differently Bay Networks implementation called DLSw Version 2 offers only Unicast UDP support while the RFC 2166 implementation provides full multicast support Unicast UDP support is provided beginning with BayRS Version 11 02 This implementation allows e The initial session establishment request CanuReach to be sent via Unicast UDP as opposed to using TCP as in RFC 1434 and RFC 1795 e Peer type configuration TCP UDP and Unknown peers e You to configure dual uni directional or single bi directional TCP connections The DLSw RFC Version parameter allows you to set up your configuration for DLSw Version 2 A router that you configure for DLSw Version 2 can also communicate with routers running RFC 1434 and RFC 1795 implementations 303523 A Rev 00 Data Link Switching Overview UDP Explorer Frames If a TCP IP session is not active the local router can send UDP explorer frames across the network to locate the destination MAC address When the local router finds the destination MAC address the destination router returns a UDP response The local router as well as the router returning the UPD response then establish a TCP IP session between them Using UDP explorer frames allows the sending router to explore the network before opening a TCP session keeping a single router available to support a larger network TCP IP sessions between ro
121. d for PU 2 0 devices e VARIABLE Variable format for T1 0 T2 0 T2 1 to T4 T5 node exchanges mostly used for PU 1 0 devices e VARIABLE Variable format most often used for PU 2 1 devices for T2 1 to T2 1 T4 T5 node exchanges N A 4 26 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Source Virtual MAC hex None Any standard MSB Token Ring MAC address Specifies the source MAC address of an emulated Token Ring endstation for this device This parameter must be defined in the LAN gateway when using an IBM 3174 or compatible gateway Other gateways typically do not define this value Enter the 12 digit hexadecimal source MAC address that you want to assign to the SDLC device The address should be in most significant bit MSB format and it should be unique in the network even among other source addresses on the router 1 3 6 1 4 1 18 3 5 1 5 12 1 6 Source Virtual SAP hex 0x4 0x01 to OxFE Specifies the source service access point SAP of an emulated Token Ring or Ethernet endstation for this device This parameter must be entered into the SAP Table of the source and destination routers The default 04 is included in the default SAP Table Begin the address with Ox and enter a 1 digit or 2 digit hexadecimal source SAP address associated with this device Ty
122. ddress Ranges When you create a filter that includes a source or destination MAC Address criterion you specify the MAC Address range in either most significant bit MSB or canonical format Table B 4 lists the address formats to use Table B 4 Format for Specifying Source Routing MAC Addresses Address Type Address Format PPP MSB PPP MSB Bay Networks Standard Frame Relay Canonical Bay Networks Proprietary PPP Canonical Token Ring MSB Ethernet Canonical When defining outbound traffic filters you can specify a MAC address in either MSB or canonical format but the default is canonical Source Routing Bridge Source MAC Addresses When specifying source MAC source routing addresses set the MSB to one For example on Token Ring packets the source MAC address to be filtered is 0x40000037450440 Then 1 Add the first bit set MAC address 0x800000000000 2 Enter the filter criteria range as 0xC00037450440 Bit 0 the 0x80 bit of byte 0 the leftmost byte indicates the presence of the routing information field RIF This bit is set to 1 if the RIF field is present and 0 if there is no RIF field Keep this in mind if you use a sniffer to analyze packets for their source MAC address For example a sniffer would decode LAA with the first byte of 40 as 0x400031740001 If the RIF bit is set the hexadecimal value of the packet is 0xC00031740001 B 4 303523 A Rev 00 Criteria for DLSw Priori
123. de more detailed technical information about DLSw services Dixon Roy C and Kushi David M Data Link Switching Switch to Switch Protocol RFC 1434 March 1993 1 30 303523 A Rev 00 Data Link Switching Overview IBM Corporation NetBIOS Frames Protocol IBM Local Area Technical Reference SC30 3383 03 December 1990 International Standards Organization ISO 8802 2 IEEE Std 802 2 International Standard Information Processing Systems Local Area Networks Part 2 Logical Link Control December 31 1989 International Standards Organization ISO IEC DIS 10038 DAM 2 MAC Bridging Source Routing Supplement December 1991 Wellfleet Communications Integrating SNA amp Multiprotocol LAN Networks A Complete Guide March 1993 Wells L and Bartky A Data Link Switching Switch to Switch Protocol RFC 1795 April 1995 Bryant D and Brittain P DLSw v2 0 Enhancements RFC 2166 June 1997 Synchronous Data Link Control Concepts GA27 3093 04 IBM Corp 1979 1992 Bay Networks Configuring SDLC Services September 1997 303523 A Rev 00 1 31 Chapter 2 DLSw Implementation Notes This chapter provides important information about the Bay Networks DLSw implementation You should review this chapter if you are configuring DLSw ona network for the first time It covers the following topics e DLSw and Other Subsystems e Combining DLSw and SRB e DLSw and Bridging Services e Parallel Bridge and
124. devices communicate with 39 devices on Ethernet 2 DLS0027A Figure 2 6 Independent DLSw Translation Bridge Network Parallel Bridge and DLSw Paths If a valid bridging path already exists between two LANS do not configure a parallel DLSw connection path between the same two LANs Figure 2 7 Parallel data paths allow frames to traverse the LANs twice which in turn may confuse systems on the associated LAN segments Token Ring 802 5 Token Ring 802 5 LAN segment Frames LAN segment gl ES Source routing bridge e e TCP IP network Router Router Frames DLS0015A Figure 2 7 DLSw Services in Parallel with a Source Routing Bridge 303523 A Rev 00 2 9 Configuring DLSw Services Multiple DLSw Peers on a LAN You can configure two or more DLSw nodes on the same SRB LAN With this configuration each DLSw peer reaches a different set of remote NetBIOS and SNA systems In this case Do not define a TCP connection between these Data Link Switches Assign the same virtual ring IDs to each peer Taking these precautions prevents frames sent by one DLSw node from propagating through the other DLSw node on the same SRB LAN Note Do not configure multiple data link switches on an Ethernet 802 3 LAN DLSw over Ethernet 802 3 LANs does not provide loop prevention Memory Re
125. dlc proto gate init 245 07 12 95 08 46 08 DEBUG SLOT 1 DLS Event Code 86 received CO ISAP registration response from SDLC nwif 3171ad50 246 07 12 95 08 46 08 DEBUG SLOT 1 SDLC Event Code 11 DLC IF CONNECT SEND MSG 247 07 12 95 08 46 08 DEBUG SLOT 1 DLS Event Code 60 received CONNECT response from SDLC port 3171ad50 ls ref 3171e230 471 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 18 SSP canureach frame received connection 00000000 The host computer returns a Test F frame informing Router A that it is available Router A then sends the ICANREACH frame to Router B 478 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 18 SSP ICANREACH new connection frame received connection 31619ea0 479 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 18 SSP ICANREACH connection frame received connection 31619ea0 480 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 18 SSP ICANREACH in SDLC frame received connection 31619ea0 Router B returns a REACHACK acknowledgment frame to Router A Router B forwards an XIDFRAME NULL to Router A Router A sends a NULL XID P to the host The host returns a NULL XID F frame to Router A which forwards an XIDFRAME NULL packet to Router B 481 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 45 SSP XID frame rcvd in SDLC conn state flag 31619ea0 4 1 303523 A Rev 00 C 13 Configuring DLSw Services Router B generates and sends an XIDFRAME T2 to R
126. documentation sets Make a note of the part numbers and prices of the items that you want to order Use the Marketing Collateral Catalog description link to place an order and to print the order form How to Get Help For product assistance support contracts or information about educational services go to the following URL http www baynetworks com corporate contacts Or telephone the Bay Networks Technical Solutions Center at 800 2LANWAN 303523 A Rev 00 xxiii Chapter 1 Data Link Switching Overview This chapter presents information about Data Link Switching DLSw as follows DLSw Networking Overview REC 1795 Support DLSw Version 2 Unicast UDP Support REC 2166 Multicast Support DLSw Single Switch and Dual Switch Services SDLC Support Frame Relay Support QLLC Support DLSw APPN Boundary Function DLSw Backup Peer Support DLSw Filtering You should review this chapter if you are responsible for configuring DLSw on one or more Bay Networks routers If you are already familiar with DLSw concepts you can go directly to Chapter 2 DLSw Implementation Notes for more detailed information about DLSw on Bay Networks routers 303523 A Rev 00 Configuring DLSw Services DLSw Networking Overview DLSw provides a standards based mechanism for reliably transporting connection oriented SNA and NetBIOS data across a network Originally defined in RFC 1434 and current
127. e zi Filter Enable Filter Name Figure 6 13 DLS Priority Outbound Filters Window This window shows any existing outbound traffic filters for DLSw peers regardless of whether the filters are currently active on the peers 2 Click on Template The Filter Template Management window appears Figure 6 14 You create templates in this window the same way you do in the Template Management window for WAN protocols See Configuring Traffic Filters and Protocol Prioritization for details about using the Priority Outbound Filters window for WAN protocols 303523 A Rev 00 6 23 Configuring DLSw Services Figure 6 14 Filter Template Management Window The software includes sample templates for filtering NetBIOS and SNA traffic NetBIOS_Queuel and SNA_Queue0 shown in Figure 6 14 The sample templates place SNA traffic in QO and NetBIOS traffic in Q1 Unless you have customized the default queue configuration QO SNA receives 60 percent of the bandwidth and Q1 NetBIOS receives 40 percent Using the remaining steps in this section you can create filters from these or similar templates To use the sample templates copy the file usr wf template template flt to the directory from which you start Site Manager your Site Manager working directory If that directory already contains a template fit file rename the existing file or copy the contents of the template flt file into your existing template flt file
128. e SDLC operates in DLSw single switch routers or in dual switch to switch networks as illustrated in Figure 1 4 Integrated SDLC conversion enables existing SDLC traffic to share a backbone network with LAN traffic without an intervening TCP IP network Traffic enters the DLSw router as SDLC and goes out the router as LLC2 over Token Ring or Ethernet The destination endstation can reside on the Token Ring or Ethernet network directly connected to that DLSw router SRB can forward the traffic through the network to a destination host or endstation In this network the local router performs the SDLC conversion and forwards the traffic across the network to the host Figure 1 8 DLSw integrated SDLC supports devices configured as primary or secondary link stations to the router A link station is a logical connection between adjacent nodes where one node is a primary link station and the other node is a secondary link station When configured as an SDLC primary device the router polls downstream cluster controllers such as the IBM 3174 and the IBM 5394 When configured as a secondary device the router responds to polls from the primary device You can use integrated SDLC in a point to point or multipoint topology Point to point connects one SDLC device to another Multipoint connects several secondary SDLC devices to one primary SDLC device You specify the topology when you configure SDLC on the synchronous circuit For more informat
129. e 4 5 DLSw Basic Interface Parameters Window for SRB Mapping Frame Relay Addresses If you are configuring a Frame Relay BNN Routed SNA 1 Select BNN from the Frame Relay SNA Connection Window 2 Edit the DLSw basic global and basic interface parameters as described earlier 3 When the LLC2 Frame Relay Mappings window opens Figure 4 6 click on Add The LLC2 Frame Relay Mapping Add window appears Figure 4 7 4 12 303523 A Rev 00 Starting DLSw Add Delete Apply Values Help pai Remote MAC Local MAC Figure 4 6 LLC2 Frame Relay Mappings Window Figure 4 7 LLC2 Frame Relay Mapping Add Window 303523 A Rev 00 4 13 Configuring DLSw Services 4 Specify the DLCI Remote MAC and Local MAC parameters as described next 5 Click on OK The Configuration Manager returns to the LLC2 Frame Relay Mappings window which now lists the selected circuit For more information about mapping DLCIs to MAC addresses refer to Configuring LLC Services Parameter DLCI Default None Options Standard data link connection identifier DLCI numbers in hexadecimal format Function X Provides the number of the virtual circuit to which you are mapping the local or remote MAC address Instructions Enter a hexadecimal DLCI number assigned by your system administrator MIB Object ID or Frame Relay provider 1 3 6 1 4 1 18 3 5 1 6 9 1 3 Parameter Remote MAC Default No
130. e DLSw peer entries because configuring a multicast IP entry allows for TCP connections to be established Router A 192 32 10 1 LAN gateway Mainframe m XX kay XN X 192 32 20 1 NetBIOS server C NetBIOS client AS 400 192 32 20 2 Router C Router B 192 32 30 2 192 32 30 1 Frame Relay 192 32 40 1 Frame Relay 192 32 40 2 Circuitless 192 32 200 1 a Frame Relay Circuitless 192 32 100 1 Front end SDLC LC processor control unit Router B Router A Router C Peer IP Table Peer IP Table Peer IP Table No Entries 192 32 200 1 192 32 100 1 DLS0023A Figure 3 5 Sample Network with Peer IP Table Definitions 3 16 303523 A Rev 00 DLSw Configuration Overview Configuring SDLC Lines and Devices This section describes the objects that you define when you configure DLSw SDLC attached devices on the router specifically e SDLC line parameters e DLSw Local Devices SDLC Line Parameters DLSw uses the SDLC Line Parameters to determine the characteristics of the link You must set these parameters to allow the router to communicate with the SNA equipment The major p
131. e on the peer router to maintain synchronization The default is 60 seconds Type the number of seconds that you want for the keepalive time interval or type 0 to disable the keepalive feature 1 3 6 1 4 1 18 3 5 1 5 1 16 KeepAlive Retry Timer 60 0 to 600 The Keepalive Retry Timer parameter specifies the maximum time in seconds between successive retransmissions of keepalive packets If an acknowledgment is not received by the local peer router within the TCP keepalive retry timeout the local peer router retransmits the keepalive packet The router continues to retransmit keepalive packets at every TCP keepalive retry timeout until it receives an acknowledgment from the remote peer or until TCP reaches the keepalive retries setting Enter a value in the range 0 to 600 seconds 1 3 6 1 4 1 18 3 5 1 5 1 30 303523 A Rev 00 5 19 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID KeepAlive Retries sec 4 0 to 99 TCP determines a lost connection either a failed link with no rerouting possible or the remote router is unavailable when TCP attempts to deliver data If TCP does not receive an acknowledgment to transmitted keepalive packets after a series of retries it declares the connection inoperable and informs DLSw The TCP KeepAlive Retries is the number of times TCP attempts to
132. e peers when the inactivity timer expires e Select Data to disable the TCP connection if no data has been transferred between the peers when the inactivity timer expires MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 35 Enabling a DLSw Interface You can use the Configuration Manager to enable or disable a DLSw interface on a specific circuit To access the DLSw interface parameters from the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt Advanced gt Interfaces The DLSw Interface Configuration window appears Figure 5 5 5 22 303523 A Rev 00 Editing DLSw Parameters DLSw Interface Configuratic 551 11c2 z Bos Delete Apply Values Help bA jod Enable ENABLE DLSw Mode PRIMARY Figure 5 5 DLSw Interface Configuration Window 2 Select an interface from the list The interfaces appear in the form lt circuit_name gt llc2 3 Change the setting of the Enable parameter if necessary Refer to the parameter description that follows this procedure 4 Edit the DLSw Mode parameter if this is an SDLC interface 5 Click on Apply to save your changes 6 Click on Done The Configuration Manager window reappears Following is a description of the parameters in the DLSw Interface Configuration window 303523 A Rev 00 5 23 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter De
133. ecimal notation Specifies the IP address of the DLSw peer that can reach the remote NetBIOS client server or application named in the same DLSw Default NetBIOS Peer IP Table entry Enter the IP address of the DLSw peer that can reach the remote client or server station or application named in the same DLSw Default NetBIOS Peer IP Table entry The router adds this IP address to the list of configured peers in the local DLSw Peer IP Table 1 3 6 1 4 1 18 3 5 1 5 11 1 3 303523 A Rev 00 5 49 Configuring DLSw Services Editing a DLSw Default NetBIOS Peer IP Table Entry You can edit only the Default NetBIOS Peer IP Address parameter in a Default NetBIOS Peer IP Table entry To edit the parameter begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt Default NetBIOS The DLSw NetBIOS Peer Configuration window appears Figure 5 22 2 Select the DLSw Default NetBIOS Peer IP Table entry to edit 3 Click on the Default NetBIOS Peer IP Address parameter and enter a new address 4 Click on Apply This saves your change to the router configuration file Done Add Delete Apply Values Help B R 1 a Default NetBios Peer IP Address 198 42 61 5 Ie Figure 5 22 Saving a DLSw Default NetBIOS Peer IP Table Entry 5 Click on Done You return to the Configuration Manager window 5 50 303523 A Rev 00 Editing DLSw Parameters
134. ed first By distributing the selection of packets from all queues weighted dequeuing is more stable than the algorithms used for circuit level WAN protocol prioritization One goal of weighted dequeuing is to send smaller packets ahead of large packets without violating the bandwidth of each queue or depriving large packets The algorithm accomplishes this by putting smaller packets ahead of larger packets by simultaneously considering how long the larger packets have been in the dequeue list A large packet accumulates credit lowering its weighted score as each smaller packet gets ahead of it and eventually the larger packet moves to the front of the dequeue list 6 4 303523 A Rev 00 Using DLSw Prioritization The Dequeue List Three factors determine a packet s weighted score e Size of the packet e Percent of bandwidth allocated to the packet s queue Time spent in the dequeue list The dequeuing algorithm calculates a packet s dequeue weight using the following formula Size of packet Weight Time in dequeue list Bandwidth 96 Weighted Dequeuing Algorithm Weighted dequeuing works as follows 1 Each priority queue enters its first oldest entry on a dequeue list 2 The dequeue list orders the packets according to a weighted score 3 TCP requests DLSw packets 4 The router sends the requested number of packets or bytes to TCP from the top of the dequeue list up to the
135. ed to synchronous interfaces and does not operate at the driver level DLSw prioritization occurs before TCP sequences packets where the data link control LLC2 or SDLC and TCP function The router sorts packets into priority queues as described later in The Enqueuing Process The router then drains dequeues the priority queues to transmit packets according to a weighted allocation algorithm described later in The Dequeuing Process Based on the needs of your site you can configure up to ten queues for each DLSw peer You can create queues for traffic with specific MAC or SAP address ranges or for SNA traffic based on criteria in the SNA transmission header FID2 and FID4 You determine whether a queue applies to all DLSw peers or to one or more specific configured peers Default and Peer Specific DLSw Queues To set the way the router handles priority queues for all DLSw traffic including unconfigured peers you use the default DLSw queue configuration To customize the handling of queued traffic for a particular configured peer you configure peer specific priority queues that apply to that peer s IP address only The default priority queue configuration applies to all configured DLSw peers except those individual peers for which you configure a custom priority queue Peer specific queues take precedence over the default queue The Enqueuing Process The router enqueues packets that match a DLSw priority filter as fo
136. ee queues priority product support xxiii protocol prioritization 5 76 accessing 6 30 advantages of 6 1 clipped packets 6 7 Default Queue Bandwidths parameter 6 14 definition of 6 1 description of 6 1 DLSw accessing 6 9 dequeuing 6 4 Max Queue Buffers for Unconfig Peers parameter 6 14 Max Queue Buffers parameter 6 21 Max Queue Size for Unconfig Peers parameter 6 14 PP for Unconfigured Peers parameter 6 13 Protocol Priority parameter 6 13 queue depth 6 7 tuning 6 7 protocol prioritization overview 1 30 Protocol Priority parameter 6 13 6 21 PU Name parameter 4 23 5 62 PU Type parameter 4 23 5 62 publications related 1 30 publications Bay Networks xxii Q queue depth DLSw protocol prioritization 6 7 queues overview 6 2 queues priority configuring 6 22 configuring default 6 11 DLSw enabling and disabling 6 19 enqueuing 6 4 peer specific 6 15 303523 A Rev 00 R Reject Unconfigured Peers parameter 5 15 Remote MAC parameter 4 14 remote NetBIOS SNA systems 3 20 RFC 1490 Frame Relay standard 1 23 RFC 1795 support 1 3 RFC 2166 multicast support 1 6 RTS Enable parameter 4 19 S SAP address in a TEST frame 2 6 in an explorer frame 2 5 SAP parameter 5 43 SAP Table parameters SAP 5 43 SAP Window 5 45 SAP Window parameter 5 45 SAP window purpose of 2 12 SAPs 3 4 SDLC conversion 1 17 enabling DLSw over 4 15 topologies 1 17 SDLC line parameters s
137. encapsulation program executions This results in fewer router cycles when processing DLSw information e Reduces the amount of TCP IP overhead per DLSw frame Instead of 52 bytes of overhead per information frame 32 for TCP 20 for IP a single TCP IP package carries multiple frames With DLSw packaging a packet may be delayed for a short period while the router waits to see whether there are any more packets routed to the same destination peer This delay may increase network latency However the performance benefits increase the number of packets that can be delivered across the network increasing response time DLSw packaging is important for networks with many LAN WAN segments and for networks with slow WAN links For information on configuring DLSw packaging parameters refer to Chapter 5 DLSw Prioritization Bay Networks routers enable you to prioritize DLSw traffic by configuring priority queues for DLSw peers You apply DLSw prioritization by using outbound filters For information on DLSw prioritization refer to Chapter 6 Protocol Prioritization You can use protocol prioritization to transmit DLSw traffic before other traffic on an individual synchronous line interface To use protocol prioritization create a filter as follows e Criteria TCP source port e Range 2065 2067 e Action high queue This ensures that SNA and NetBIOS traffic receives preference on the network For more information about how to acc
138. er Name FID_type_Log Figure 6 19 DLS Priority Outbound Filters Window with Configured Filters 303523 A Rev 00 6 29 Configuring DLSw Services Using the DLSw Peer Configuration Window In addition to using the menu selections shown in this section you can access the DLSw Protocol Prioritization windows directly from the DLSw Peer Configuration window Figure 6 20 i Gibis Oboe Oa Ce ioe d Dore Default Gucura Bande itis 23 Deft Ques Bania ithe Deda lt CTI EIE PETER IRIS Delete Fidel PY blobal PP Oeics PP Filters Face ig Pretec Priority Mens Queue Galfer foe Gore Size Figure 6 20 DLSw Peer Configuration Window Table 6 1 lists the ways in which you access the DLSw Peer Configuration window Table 6 1 Accessing the DLSw Protocol Prioritization Windows Click on This Button in the DLSw Peer To Access This Window Configuration Window Global DLSw PP Parameters Defaults PP Global Peer Queue Configuration PP Queues DLS Priority Outbound Filters PP Filters 6 30 303523 A Rev 00 Using DLSw Prioritization Sample Templates for DLSw Protocol Prioritization In addition to using the Configuration Manager screens described in this guide to configure traffic filter templates you can also edit or copy a traffic filter template using a text editor The Configuration Manager stores all templates for all protocols in the file usr wf template template flt Inc
139. er this router supports NetBIOS traffic and adds the NetBIOS SAP entry OxFO to the SAP Table Select Yes if you want to use NetBIOS DLSw Advanced Global Parameters All parameters that appear in the DLSw Advanced Global Parameters window are optional However you can edit the Virtual Ring MTU and the Max Slot Sessions parameters to tune a DLSw single switch network 303523 A Rev 00 3 3 Configuring DLSw Services Virtual Ring MTU The Virtual Ring MTU parameter allows you to limit the size of packets traversing the network Based on the value that you specify the router enters the appropriate maximum MTU into any SRB explorer packet that uses DLSw services Max Slot Sessions DLSw provides buffering of LLC2 packets in single switch mode Therefore DLSw can use a significant amount of memory To limit the memory consumption edit the DLSw Max Slot Sessions parameter to limit the number of LLC2 stations per slot DLSw SAP Table Every data packet contains a 1 byte destination SAP and source SAP You can select whether DLSw affects packets based on SAPs that are defined to DLSw Each router maintains an independent list of DLSw SAP addresses in a global DLSw SAP Table Use the Configuration Manager to access and edit the DLSw SAP Table Each DLSw SAP Table entry has a unique hexadecimal value The default SAP Table includes SAPs 00 04 08 and OC hexadecimal This is sufficient for most SNA applications To support NetBIOS
140. es Help ML Disable DLSw Mode PU Name PU Type IDBLOCK 3 hex digits IDNUM 5 hex digits Figure 4 10 DLS Local Device Configuration Window 6 From the DLS Local Device Configuration window Figure 4 10 click on Add The Local Device Configuration window appears Figure 4 11 To take advantage of integrated SDLC services in DLS w you must define the SDLC devices that you want to appear as natively attached to the LAN When you define such devices you map the devices to LAN MAC and SAP addresses 4 20 303523 A Rev 00 Starting DLSw Local Device Configuration Cancel 0K Values Help DLSw Mode gRIMARY Link Station Address hex PU Name PU Type IDBLOCK 3 hex digits IDNUM 5 hex digits Xid Format Source Virtual MAC hex Destination MAC hex Figure 4 11 Local Device Configuration Window Following are descriptions of the local device configuration parameters 303523 A Rev 00 4 21 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID DLSw Mode Primary Primary Secondary PP Secondary MP Specifies the type of link station you are configuring on this node A primary link station controls a data link issues commands polls secondary stations
141. es 9 Click on Done The Peer Queue Configuration window reappears Figure 6 11 Now two of the DLSw peers use peer specific queues and two use the default queue configuration 6 18 303523 A Rev 00 Using DLSw Prioritization Dore Apply Protocol Priority Hn Queue Bol ferr Hm bome Size Figure 6 11 Peer Queue Configuration Window with Both Default and Peer Specific Configurations Enabling or Disabling a Single Peer s Priority Queues You can enable or disable the queues that you configured for an individual DLS w peer using the Peer Queue window Note Once you enable priority queues using the Peer Queue Configuration window you must use that window to disable that peer s queues You cannot disable queues that are already active from the Global DLSw PP Parameters Default window 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound gt Peer Queue Entries The Peer Queue Configuration window appears refer to Figure 6 11 Select the peer from the scroll box Change the value of Protocol Priority to Enabled or Disabled Click on Apply Click on Done m pe m p 303523 A Rev 00 6 19 Configuring DLSw Services Customizing Specific DLSw Peer Queues Once you create and enable peer specific queues the DLSw peer in question uses default values that dictate how the priority queues work You can change these values accordin
142. es 3 20 3 21 MAC 3 20 peer IP 3 12 3 21 5 35 5 38 Backup Config parameter 4 39 5 30 5 73 Backup End Time hhmm parameter 4 41 5 76 Backup End Time parameter 5 32 Backup Hold Down Time sec parameter 4 40 5 75 Backup Hold Down Time parameter 5 31 Backup IP Address parameter 4 39 5 30 5 74 Backup Max Up Time parameter 4 40 5 31 5 74 Backup Peer Type parameter 4 39 5 74 backup peers 1 29 3 14 Backup Start Time hhmm parameter 4 41 5 75 Backup Start Time parameter 5 32 BAN 1 24 BNN 1 23 boundary function DLSw APPN 1 24 4 33 bridging services source routing 2 6 translation bridge 2 7 translation bridge on an SRB circuit 2 5 transparent bridge 2 6 broadcast peers 3 14 C Cable Type parameter 4 18 Canureach Retries parameter 4 29 5 68 303523 A Rev 00 Index Canureach Retries2 parameter 4 30 5 69 Canureach Timer parameter 4 29 5 67 Canureach Timer2 parameter 4 30 5 68 circuitless IP used as a DLSw peer IP address 5 36 Clock Source parameter 4 16 configuration objects for SDLC operation 3 17 configured peers 5 1 congestion control DLSw prioritization 6 7 conventions text xx D Default Bandwidths parameter 6 14 Default MAC Peer IP Address parameter 5 57 default MAC peer IP entries adding 5 54 deleting 5 57 default MAC peer IP table parameters Default MAC Peer IP Address 5 57 MAC Address 5 55 MAC Peer IP Address 5 55 Default NetBIOS Peer IP Address 5 5
143. ess and configure traffic filters for DLSw services refer to Configuring Traffic Filters and Protocol Prioritization 303523 A Rev 00 2 13 Configuring DLSw Services Backup Peers The backup peer feature allows you to use a backup peer if the TCP connection to the primary peer cannot be established The TCP connection to the backup peer remains established as long as it is needed or until the maximum up time period has expired in which case the TCP connection is brought down DLSw will bring down a backup peer connection if there are no established DLSw connections or if the DLSw connections are idle i e no data has passed You can configure backup peers for the following DLSw versions RFC 1434 RFC 1795 DLSw Version 2 0 Unicast or RFC 2166 Multicast You select a version using the DLSw RFC Version parameter from the DLSw Basic Global Parameters window For instructions on using this parameter refer to Chapter 4 To configure backup peers you select Yes at the Backup Config parameter on the DLSw Multicast Configuration window or the DLSw Peer Configuration window This enables the rest of the backup peer parameters The Backup Peer Type parameter defines how the session attempts to establish a TCP connection using the backup peer The valid values are e RFC 1795 Send the request for connection over TCP only e V20 Unicast TCP Send the request for connection over TCP only e V20 Unicast Unknown Send the
144. estination Element DAF Destination Address Field OAF Origin Address Field User Defined See the Specifying MAC Address Ranges section later in this appendix 2 See the Specifying Source and Destination SAP Code Ranges section later in this appendix DLSw Reference Points Tables B 2 and B 3 list the predefined DLSw reference points for outbound traffic filters based on the SNA transmission header B 2 303523 A Rev 00 Criteria for DLSw Prioritization Table B 2 DLSw Reference Points for FID2 Frames Criteria FID2 Reference Point Offset bits Length bits Format Identifier FID SNA_START 0 4 Expedited Flow Indicator EFI SNA START 7 1 Destination Address Field DAF SNA START 16 8 Origin Address Field OAF SNA START 24 8 Table B 3 DLSw Reference Points for FID4 Frames Criteria FIDA Reference Point Offset bits Length bits Format Identifier FID SNA START 0 4 Network Priority SNA START 7 1 Transmission Priority Field SNA START 30 2 TPF Destination Subarea Address SNA START 64 32 Field DSAF Origin Subarea Address Field SNA START 96 32 OSAF Expedited Flow Indicator EFI SNA START 135 1 Destination Element Field DEF SNA START 144 16 Origin Element Field OEF SNA START 160 16 303523 A Rev 00 B 3 Configuring DLSw Services Specifying MAC A
145. eter SRVHEURISTICS to 9 Use traffic filters caches or network design to limit unnecessary NetBIOS traffic use protocol prioritization to provide more DLSw bandwidth on the WAN C 26 303523 A Rev 00 Troubleshooting DLSw Table C 11 LLC Troubleshooting Problem Possible Cause Action Solution Frame rejects cause session failures Endstation MAXIN parameter smaller than wfLIcInterface Tw MTU received is too large for configuration T1 timer too short for long WAN delays Verify the configuration of the endstation and check the configured LLC window sizes Increase the wfLlcInterfaceMaxMtu variable to larger than the possible data size Increase the wfLlcinterface TAckWait Setting to avoid timeouts Table C 12 SDLC Troubleshooting Problem Possible Cause Action Solution DLSw configured for SDLC Incorrect configuration Check the configuration to does not come up DLSw connection not establishing Improper cabling ensure that SDLC is configured and connected Make sure that the router software image contains DLS exe LLC exe NBASE exe and SDLC exe Verify that you are using the correct cables refer to Verifying the WAN Cabling section in this appendix continued 303523 A Rev 00 C 27 Configuring DLSw Services Table C 12 SDLC Troubleshooting continued Problem Possible Cause Action Solu
146. etting 4 15 SDLC Receive Credit parameter 4 31 5 70 SDLC Transmit Credit parameter 4 32 5 70 secondary link stations 1 17 secondary SDLC operations 1 19 single switch SDLC conversion 1 17 single switch services 1 11 slot entries adding 5 37 Slot IP Table parameters IP Address 5 38 IP Address for TCP Connection 5 40 Slot 5 38 Slot parameter 4 38 5 38 5 73 SNA Fallback Attempts parameter 5 20 SNA sample template 6 24 6 31 303523 A Rev 00 Source Virtual MAC hex parameter 4 27 5 65 Source Virtual SAP hex parameter 4 27 5 66 SRB and DLSw 2 2 subsystems and DLSw 2 1 support Bay Networks xxiii Sync Line Coding parameter 4 18 synchronous parameters Cable Type 4 18 Clock Source 4 16 Internal Clock Speed 4 17 RTS Enable 4 19 Sync Line Coding 4 18 synchronous pass through 1 21 T TCP Inact Method parameter 5 22 TCP Inact Time parameter 5 21 TCP Window Size parameter 5 11 TCP IP DLSw communications over 1 15 technical publications xxii technical support xxiii Technician Interface 5 1 template flt file editing 6 31 sample 6 24 6 31 templates changing after applying to a filter 6 24 sample 6 24 TEST frames 2 6 text conventions xx Token Ring to Ethernet topology considerations 5 14 traffic filters 5 76 DLSw and outbound 1 30 outbound creating DLSw templates 6 24 DLSw interfaces 6 22 DLSw priority outbound filters 6 23 filter template management 6 24 media
147. f the initial connection does not occur within the standard Canureach Timer and Canureach Retries settings Type the number of retries that you want Enter 0 if you do not want to transmit CANUREACH messages Type 4294967295 to send an infinite number of CANUREACH messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 18 4 30 303523 A Rev 00 Starting DLSw Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Link Station Timer 30 0 to 3600 Sets the time interval in seconds after which the router sends a connect request to the local SDLC device to establish a session Enter the number of seconds you want for the time interval For example enter 1 to send a connect request once a second or enter 3600 to send a connect request once an hour Enter 0 if you do not want to send connect requests 1 3 6 1 4 1 18 3 5 1 5 12 1 13 Link Station Retries 4294967295 0 to 4294967295 Specifies the maximum number of times that a connect request is sent to the local SDLC device to establish a session Enter the number of retries you want Enter 0 if you do not want to send connect requests Leave the default value 4294967295 to send an infinite number of connect requests for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 14 SDLC Receive Credit
148. fault Options Function Instructions MIB Object ID Enable Enable Enable Disable Enables or disables Data Link Switching over this interface Enable Initializes the DLSw interface that you added to a physical circuit Also use the Enable setting to reinitialize an existing DLSw interface disabled earlier The state of the interface depends on the up down state of the associated circuit and slot e Disable Switches a DLSw interface from the enabled up state to the disabled down state Select Enable if you previously set this parameter to Disable and now want to reenable data link switching over this interface Select Disable only if you want to disable data link switching over this interface This cancels all active LLC2 sessions currently supported by the interface 1 3 6 1 4 1 18 3 5 1 5 2 1 2 DLSw Mode Primary Primary Secondary PP Secondary MP Specifies the type of link station that you are configuring on this node A primary link station controls a data link issues commands polls secondary stations and initiates error recovery procedures Only one link station on an SDLC line can be the primary station all other stations on the line must be secondary When configured as a primary SDLC link station the router communicates with downstream PU 2 0 and PU 2 1 nodes A secondary link station receives commands and responds to primary link station polls When configured as a secondary SDLC link s
149. figuring DLSw Services Table C 5 Common DLSw Problems continued Problem Possible Cause Action Solution Frame rejects cause session failures Endstation MAXIN parameter smaller than wfLIcInterface Tw MTU received is too large for configuration T1 timer too short for long WAN delays Verify the configuration of the endstation and check the configured LLC window sizes Increase the wfLlcInterfaceMaxMtu variable to larger than the possible data size Increase the wfLlcinterface TAckWait Setting to avoid timeouts The router is sending RNRs Mismatch of SDLC link station interface MAXOUT parameter Edit the MAXOUT parameter setting The DLS interface configured for SDLC does not come up Improper cabling Install correct cable s Refer to the Verifying the WAN Cabling section later in this appendix An IBM AS 400 cannot connect to another AS 400 Using SAP 0 for SSAP on test frames Configure SAP 0 in the DLSw SAP configuration continued 303523 A Rev 00 Troubleshooting DLSw Table C 5 Common DLSw Problems continued Problem Possible Cause Action Solution File transfers with large packets are slow DLSw uses more CPU than SRB The TCP window size is too small causing RNRs at the source The TCP window size is too large causing latency problems IP WAN frames are fragmented TCP is transmitting
150. for more information on BNN and BAN SDLC to LLC2 Conversion Using single switch conversion enables the router to convert incoming SDLC traffic into the appropriate format for forwarding to an attached LAN or Frame Relay network The conversion does not require an intervening WAN 303523 A Rev 00 Data Link Switching Overview Figure 1 6 illustrates a network using adjacent routers each performing single switch conversion Between single switch routers the LLC2 protocol is used Cluster controller NetBIOS server Token Ring Frame Relay backbone LLC2 SNA Bay Networks router processor oO o Frame Relay only Logical connection DLS0003A Figure 1 6 Bay Networks Adjacent Single Switch Routers QLLC to LLC2 Conversion Using single switch conversion enables the router to convert incoming QLLC traffic received over an X 25 network into the appropriate format for forwarding to an attached LAN or Frame Relay network The conversion does not require an intervening WAN Dual Switch Services DLSw dual switch services allow SNA and NetBIOS traffic to share a multiprotocol backbone The DLSw standard specifies TCP IP as the standard transport mechanism for SNA and NetBIOS across an internetwork 303523 A Rev 00 1 15 Configuring DLSw Services jJ
151. g e NRZI Mark Indicates nonreturn to zero inverted mark encoding This parameter is relevant only for the AN and ASN routers and the Octal Sync module Other Bay Networks router platforms use NRZ encoding Select NRZ or NRZI NRZI Mark is not generally used for SDLC 1 3 6 1 4 1 18 3 4 5 1 88 Note NRZI line coding operates only with the following Bay Networks routers AN ASN Octal Sync and MCT1 with DSOA Parameter Default Options Function Instructions MIB Object ID Cable Type RS232 Null RS232 RS422 V35 X21 Specifies the cable interface to the network Click on Values and select the installed cable interface type 1 3 6 1 4 1 18 3 4 5 1 83 4 18 303523 A Rev 00 Starting DLSw Parameter RTS Enable Default Disable Options Enable Disable Function Controls the toggling of the Request to Send RTS signal on the interface Instructions Click on Values and select Enable or Disable For manual dial modems 2 wire set this parameter to Enable For leased modems 4 wire set this parameter to Disable MIB Object ID 1 3 6 1 4 1 18 3 4 5 1 16 3 Click on OK The Select Protocols window appears Figure 4 9 Select Protocols Figure 4 9 Select Protocols Window 4 Select DLSw and click on OK 5 Edit the DLSw basic global and basic interface parameters as described earlier 303523 A Rev 00 4 19 Configuring DLSw Services Delete Apply Valu
152. g a DLSw Default MAC Peer IP Table Entry To add a new DLSw Default MAC Peer IP Table entry begin at the DLSw MAC Peer Configuration window and 1 Click on Add The DLSw MAC Configuration window appears Figure 5 25 198 42 51 0g Figure 5 25 MAC Addresses in the DLSw MAC Configuration Window 2 Type the Token Ring 802 5 MAC address This is the address associated with the SNA system or application that you want to reach via DLSw services 3 Type the IP address of the DLSw peer This is the IP address of the DLSw peer that can reach the SNA system or application that you identified in the MAC Address parameter box 4 Click on OK This saves your entry to the configuration file The DLSw MAC Peer Configuration window reappears with the new entry in the list of existing DLSw MAC peers refer to Figure 5 24 Following are descriptions of the MAC Address and MAC Peer IP Address parameters 5 54 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID MAC Address None Any valid 48 bit MAC address expressed in hexadecimal notation Specifies the MAC address associated with the SNA system or application that you want to reach via DLSw services Type in hexadecimal format the MAC address associated with the remote SNA system or application that you want to reach via D
153. g to your network traffic needs 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound gt Peer Queue Entries The Peer Queue Configuration window appears Figure 6 12 Dore MEINES PERDRE ERR fe Dea lt Ques Ble d thie Pao ly ENLUCUHIEOTETTUeTmEM Default Gucura Bamia idha Protocol Priority Hex ueue Bal fere Max Dore Size Figure 6 12 Peer Queue Configuration Window 2 Edit the Peer Queue parameters that you want to change using the following descriptions as guidelines 3 Click on Apply 4 Click on Done 6 20 303523 A Rev 00 Using DLSw Prioritization Peer Queue Configuration Parameter Descriptions Use the following descriptions as guidelines when you configure parameters on the Peer Queue Configuration window Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Protocol Priority Disabled Enabled Disabled Toggles protocol prioritization on and off for this peer If you set this parameter to Disabled priority filters will be disabled on this peer Setting this parameter to Disabled is useful if you want to temporarily disable protocol priority but leave the outbound filters in place Set to Disabled if you want to temporarily disable all protocol prioritization activity on this peer Set to Enabled if you previously disabled proto
154. ge to DISCONECTED The local router sends the DISCONNECT frame to the remote router 18 04 25 95 22 43 09 DEBUG SLOT 1 DLS Event Code 17 LLC DISC frame received 19 04 25 95 22 43 09 DEBUG SLOT 1 DLS Event Code 16 State change in llc disc ind conn 30927f70 old state 1 new state 11 303523 A Rev 00 Troubleshooting DLSw Troublesh The remote router issues a DL_HALTED frame and sends it to the local router 20 04 25 95 22 43 09 DEBUG SLOT 1 DLS Event Code 45 SSP dl halted frame rcvd in LLC conn state flag 30927f70 b 0 The local endstation is DISCONNECTED end to end 21 04 25 95 22 43 09 DEBUG SLOT 1 DLS Event Code 16 State change in ssp dlhalted conn 30927f70 old state 11 new state 11 ooting DLSw This section provides general information on troubleshooting DLSw and the basic DLSw component subsystems It covers the following topics e Viewing Isolated Problems e Common DLSw Problems and Nonproblems e DLSw Troubleshooting Tables covering symptoms possible causes and actions specific for the following categories DLSw configurations DLSw interfaces TCP SNA LLC SDLC Viewing Isolated Problems This section assumes that you have isolated a problem to DLSw Troubleshoot DLSw as follows 1 Use the Events Manager or the Technician Interface to filter the log to display messages of all severity levels for DLSw If you use the Te
155. gle and dual switch services you must set the DLSw basic global and basic interface parameters for your network The parameters that you edit will depend on the type of interface you are configuring To tune DLSw single and dual switch services use the DLSw advanced global and advanced interface parameters 303523 A Rev 00 3 1 Configuring DLSw Services Adding Single Switch DLSw Services When configuring a DLSw single switch network DLSw is enabled on each relevant interface Using single switch mode allows communication between Devices attached to different local interfaces on the same router For example an SDLC attached 3274 control unit can communicate with a local LAN attached SNA server Figure 3 1 A local device and an SNA device directly attached to a Frame Relay network An SNA device connected to Router B Figure 3 1 can communicate with the AS 400 using either BNN or BAN protocols SNA and NetBIOS devices attached to different routers each running DLSw For example a NetBIOS client attached to Router A can communicate with the NetBIOS server connected to Router B Figure 3 1 The connection can cross multiple routers running DLSw Since DLSw is running on the WAN interface the router operates as single switch DLSw Frame relay network NetBIOS client ae SNA server
156. greements which defines how SNA traffic traverses a Frame Relay network BNN allows native SNA traffic originating from SDLC LAN or WAN attached devices to communicate directly over public or private Frame Relay networks with an SNA processor Devices can communicate with intermediate routing nodes or in a single switch configuration function as a FRAD Since BNN does not carry the destination and source MAC addresses in the network packets the BNN format carries the fewest number of bits per packet and yields low network overhead Therefore you must explicitly define the PVC to carry the packet to its destination You do this with the LLC2 Frame Relay Mapping Table The mapping table consists of three fields e DLCI e Remote or Destination MAC e Local MAC or Source MAC Each entry requires that you specify the Remote MAC Local MAC or both A packet that matches this entry is then forwarded to the specified DLCI 303523 A Rev 00 1 23 Configuring DLSw Services Boundary Access Node BAN is an IBM router enhancement BAN refers to the RFC 1490 specification for Bridged SNA over Frame Relay The associated IBM NCP 7 3 enhancement is called the Boundary Node Identifier BNI Since BAN carries the destination and source MAC addresses in the network packets this format carries more bits per packet and requires less configuration Standard BAN uses the SRB frame format with local termination Bay Networks routers sele
157. gured on the same slot 1 3 6 1 4 1 18 3 5 1 5 1 8 Virtual Ring MTU 1500 Any number of bytes equal to or greater than 1 Specifies an MTU size for frames sent from local LAN attached systems to systems on remote LANs The smallest MTU size supported among all remote LANs in your configuration determines the maximum value of the Virtual Ring MTU parameter for the local router The Virtual Ring MTU allows network administrators to limit the size of packets traversing the network Based on the value that you specify the router enters the appropriate maximum MTU into any SRB explorer packet that uses DLSw services Type any number of bytes equal to or greater than 1 Entering a new value or accepting the default value for this mandatory parameter helps to prepare endstations for the MTUs of remote LANs 1 3 6 1 4 1 18 3 5 1 5 1 10 303523 A Rev 00 5 13 Configuring DLSw Services Note Ethernet networks support an MTU size of 1500 bytes while Token EJ Ring networks support much larger MTUs When configuring DLSw for local Token Ring to Ethernet translation bridge topologies the Virtual Ring MTU parameter should not exceed 1500 This sets the Token Ring MTU size so that Ethernet endstations can accept the Token Ring traffic Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID MAC Cache Age 300 Any number of seco
158. he flow of the session 4 Asthe remote endstation acknowledges frames the counter on the remote DLSw switch decrements 5 After the remote endstation acknowledges all outstanding frames the remote DLSw switch sends an end flow control indication back to the local DLSw switch 6 Thelocal DLSw switch then sends RR receiver ready to the local endstation thereby allowing it to send more frames TCP Flow Control Each pair of TCP connections between DLSw peers carries data from many LLC2 sessions When congestion occurs on the TCP IP network between DLSw peers TCP e Reduces or closes its transmit window e Signals the local and remote LLC2 interfaces to assert flow control on any LLC2 connections associated with the congested TCP connections DLSw Flow Control A counter on the remote DLSw switch increments as the local endstation sends frames that the remote endstation has yet to acknowledge When the counter reaches half the value specified in the SAP Window parameter the remote DLSw switch sends a flow control indication back to the local DLSw switch For RFC 1434 the flow control indication is an Enter Busy SSP message 303523 A Rev 00 DLSw Implementation Notes DLSw Packaging In DLSw dual switch configurations packaging allows multiple DLSw frames consisting of user data and the DLSw SSP header to be placed into a single TCP IP frame This provides two performance benefits e Reduces the number of TCP IP
159. he state of California Should you have any questions concerning this Agreement contact Bay Networks Inc 4401 Great America Parkway P O Box 58185 Santa Clara California 95054 8185 LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT UNDERSTANDS IT AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS LICENSEE FURTHER AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN BAY NETWORKS AND LICENSEE WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE AGAINST BAY NETWORKS UNLESS BAY NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT iv 303523 A Rev 00 Contents Preface Before YOU BEGIN ced ousates tt ena iaaa MR s Ere Dux tud In Ra ER tM DE nla ERR RADO END CN CER DURS xix BU ws qd e Xx NI ET E xxi Bay Networks Technical Publications 4525 tin nt rn tih e tttbkin em eerta eee o AUNT How TO GoLHOID eem xxiii Chapter 1 Data Link Switching Overview DLOW Ne tara Ing OVGIVIGW Amt 1 2 ED 17259 SUD OL oae aaa eee are ee UR ME as 1 3 Differences Between RFC 1795 and RFC 1434 sess TE DLSw Version 2 Unicast UDP SUDO ouest tenera catum rra cake ev a vas Rime e E 1 4 UDF m se FAMOS RET m TU TT 1 5 TOP UDF and Unknown Peer Types eic sei sd
160. hem e Notify DLSw to stop and start the flow of packets There must be sufficient memory available for congestion control to prevent clipping The less the congestion the better the queue performance Queue Depth Using Site Manager parameters you configure the maximum queue buffers and the percentage of bandwidth for each queue Queue depth is the configurable number of packets that each DLSw priority queue can hold The default value is 50 packets regardless of packet size When you set the queue depth you assign buffers that hold the packets in the DLSw queues To determine whether there are enough buffers for the DLSw traffic flow on your network examine the following protocol prioritization statistics that the router keeps for each DLSw priority queue e DLSw HiWater Packets Mark The greatest number of packets that have been in each queue e DLSw Congestion Control Count The number of packets that the router has discarded from each queue The router discards packets from full priority queues Generally if a queue s Congestion Control Count is high and its HiWater Packets Mark is close to or equal to its queue depth you have not assigned enough buffers to that queue 303523 A Rev 00 6 7 Configuring DLSw Services Configuring Default Priority Queues You configure the default behavior of DLSw protocol prioritization using the Global DLSw PP Parameters Defaults window Use this window to enable disable o
161. hex None Any standard MSB Token Ring MAC address Specifies the source MAC address of an emulated Token Ring endstation for this device Type the 12 digit hexadecimal source MAC address that you want to assign to the SDLC device The address should be in MSB format and it should be unique in the network even among other source addresses on the router 1 3 6 1 4 1 18 3 5 1 5 12 1 6 303523 A Rev 00 5 65 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Source Virtual SAP hex 0x4 0x01 to OxFE Specifies the source SAP of an emulated Token Ring or Ethernet endstation for this device Begin the address with Ox and type a 1 digit or 2 digit hexadecimal source SAP address associated with this device Typical values are multiples of 4 1 3 6 1 4 1 18 3 5 1 5 12 1 7 Destination MAC hex None Any standard MSB Token Ring MAC address Identifies with the Destination SAP the Token Ring or Ethernet host that the local device will reach via SDLC services Consult your host system manager for the host MAC address then type the 12 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 8 Destination SAP hex 0x4 0x01 to OxFE Identifies with the Destination MAC the Token Ring or Ethernet host that
162. hm Tableg inesse cetuseeunec cma puae cbe pua bct bn pao cr ERE aa C 22 Ventying te WAN Cabling Me C 29 Index 303523 A Rev 00 xi Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 1 8 Figure 1 9 Figure 1 10 Figure 1 11 Figure 1 12 Figure 1 13 Figure 1 14 Figure 1 15 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 303523 A Rev 00 Figures Addressing a Message to an IP Multicast Group seesesses 1 8 Receiving a Message Addressed to a Multicast Group 1 9 Mulbicast DLG isse isiscesr i edet pe cei itta db n ed deo pau ed pa Sea pie di 1 10 DLSw Single Switch and Dual Switch to Switch Networks 1 12 Bay Networks Single Switch Router ccceccsscceeeeesscceeeessteeeesteeeeee 1 14 Bay Networks Adjacent Single Switch Routers sesesssss 1 15 DLSw Dual Switch Services for SNA Devices on LANS 1 16 Primary SDLC Routers in Single Switch DLSw Networks 1 18 Secondary SDLC Routers in a Single and b Dual Switch DLSw Networks onsec m onde dubie Combining Primary and Secondary SDLC ME 1 21 Sample Frame Relay Network 1 casei etat unu cet nb nm ck edu Bun uat k n 1 22 Data Center APPN MetwOFK cicer o onere
163. hooting Problem Possible Cause Action Solution DLSw TCP connections do not come up Improper DLS Slot Table configuration no IP address configured on slot Each slot running DLSw requires a unique IP address assigned to each DLSw slot DLSw TCP connections partially come up No peer configured Peer is not reachable Add a peer and its IP address to the Peer Table Check to see if IP routing is enabled and the peer is configured or known to DLSw TCP connections come up but traffic is not passed DLSw Slot Table configuration does not match DLC interface location Correct the configuration by creating a DLS slot entry for every slot that has a DLC interface TCP has excessive retransmissions TCP window is too large TGP is filling WAN buffers and causing dropped frames Edit the TCP Window Size parameter and specify a smaller value Configure protocol prioritization and allocate adequate queue depth TCP sessions do not come down when the IP path is lost TCP Keepalive Time parameter set to 0 Edit the Keepalive Time parameter and specify a value in the range 0 to 2147483647 seconds Refer to the Keepalive Time parameter in Chapter 5 for more information 303523 A Rev 00 Troubleshooting DLSw Table C 9 SNA Troubleshooting Problem Possible Cause Action Solution SNA stations cannot connect over DLSw Host is un
164. hree routers running DLSw This network uses the following Peer IP Table entries e Router A s Peer IP Table has a single entry as follows The DLSw single switch communication with Router B does not require an entry in the Peer IP Table The connection to Router C uses dual switch DLSw You must create an entry in the Peer IP Table so that Router A can forward DLSw broadcasts to Router C Router A s Peer IP Table contains the circuitless IP address of Router C 192 32 200 1 since this value is the only value in Router C s Slot Table e Router B communicates to Router A via a single switch connection You do not need a Peer IP Table for Router B e Router C communicates with Router A using dual switch mode Router C s Peer IP Table contains the circuitless IP address of Router A 192 32 100 1 However you can use any IP address in Router A s Slot Table instead of the circuitless IP address When using dual switch mode you do not configure DLSw on the links between the routers You must configure IP on these interfaces When communicating using single switch mode you must configure DLSw on the connecting interfaces Note that either link from Router A to Router C can transport DLSw traffic Standard IP routing determines the link over which these routers communicate 303523 A Rev 00 3 15 Configuring DLSw Services Multicast IP Entries RFC 2166 When you configure a multicast IP entry you do not need to configur
165. iew Since keepalive packets are sent only on idle lines increasing the keepalive interval may decrease the cost of an idle network In busy networks the keepalive interval is not necessary Frequent traffic for TCP transmission performs the same function as a keepalive setting In busy networks the DLSw keepalive is not necessary Frequent traffic for TCP transmission performs the same function as a keepalive setting For example frequent NetBIOS broadcast traffic functions as a TCP keepalive Reject Unconfigured Peers The Reject Unconfigured Peers parameter allows you to limit the addition of new DLSw sessions If you set the parameter to Reject the router establishes sessions only with those routers that are defined in the DLSw Peer IP Table If you set the parameter to Accept the router allows new DLSw sessions with any router that requests a session Generally routers connected to devices that initiate SNA NetBIOS sessions usually routers located at remote sites in a hub configuration must have a configured Peer IP Table allowing a parameter setting of Reject Routers that learn about remote locations and devices dynamically such as central site routers do not have a configured Peer IP Table These routers should have a Reject Unconfigured Peers parameter setting of Accept MAC Cache Age The MAC Cache Age parameter allows you to specify the maximum number of seconds that inactive MAC addresses can exist in the MAC to DLSw
166. if you want to disallow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Disallowing TCP sessions prevents the router from learning the IP addresses of other peers in the network 1 3 6 1 4 1 18 3 5 1 5 1 13 DLSw RFC Version RFC1434 RFC 1434 RFC1795 V2 0 Unicast RFC2166 Multicast Selects the RFC implementation to run on the router RFC 1434 RFC 1795 DLSw Version 2 0 or RFC 2166 Click on Values and select RFC 1434 RFC 1795 V2 0 or RFC 2166 Refer to Chapter 1 for detailed information on these RFCs 1 3 6 1 4 1 18 3 5 1 5 1 28 DLSw NetBIOS Support No Yes No Specifies whether this router supports NetBIOS traffic and adds the NetBIOS SAP entry OxFO to the SAP Table Click on Values and select Yes or No If you specify Yes the software automatically adds the SAP OxFO to the SAP Table N A 5 6 303523 A Rev 00 Editing DLSw Parameters Parameter DLSw Peer IP Address add only Default 0 0 0 0 Options Any valid 32 bit IP unicast address of the form network host using dotted decimal notation The valid ranges are 0 0 0 0 through 223 255 255 255 and 240 0 0 0 through 255 255 255 255 Function Specifies the IP address of a remote DLSw peer Once added to the DLSw peer table this address defines a configured peer on the local router Configured peers receive all DLSw related broadcast frames for a given router or network processor Instructions Enter
167. iguring DLSw Services You enter slot information in the DLSw Slot IP Table during the initial configuration procedure Refer to Chapter 5 for more information about accessing and editing the DLSw Slot IP Table DLSw Peer IP Table TCP IP sessions exchange information between devices attached to each router Data link switches that connect to the same TCP IP network are called DLSw peers Each DLSw peer is represented by an IP address On Bay Networks routers each slot that you configure with DLSw services functions as an independent DLSw peer Other vendors may offer RFC 1434 1795 compliant products that support either single or multiple DLSw peers internally For example each IBM 6611 processor in your network serves as a single DLSw peer that you must define on the router In each router you can define a list of peers identifying remote routers with which a DLSw session can be initiated These are called configured peers and are defined in the DLSw Peer IP Table Configured Peers A configured peer is a remote data link switch represented by an IP address that is predefined in the local router You define a configured peer by specifying its unique IP address in the Site Manager DLSw Peer IP Table IP addresses in the local router s Peer IP Table must also appear in the Slot Table of a remote router A configured peer can receive broadcast frames directly from DLSw peers in a local router The local router issues broadcas
168. indow refer to Figure 5 1 and select Protocols gt DLSw gt Peer IP Table The DLSw Peer Configuration window appears listing all DLSw configured peers known to the local router Figure 5 10 Doren Pech alati MP 6 lot PP Duain PF Filters Pp Lu YAILHHE s ai Halp Pratecel Priority F r Gomis Bad fere Kom Gace Size UIT E MB IT Reckup IP Adiresm Backup Max Up Time oec Figure 5 10 DLSw Peer Configuration Window 5 28 303523 A Rev 00 Editing DLSw Parameters Descriptions of the Peer IP Table parameters follow Note The DLSw protocol prioritization and traffic filtering functions are described in Chapter 6 Refer to this chapter for information on the Protocol Priority Max Queue Buffers and Max Queue Size parameters as well as information on the protocol priority buttons in the DLSw Peer Configuration window Parameter Default Options Function Instructions MIB Object ID Transport Type Unknown TCP UDP Unknown Specifies the transport capabilities at the remote peer TCP UDP or Unknown The local router attempts to use this configured transport option when establishing a TCP connection with the remote peer The Transport Type parameter is available only when the DLSw RFC Version parameter is set to V2 0 A remote peer configured with the transport type TCP operates in RFC 1795 mode A remote peer configured with the transport type UDP operates in DLSw Versio
169. indow to appear is the DLSw Basic Global Parameters window E 2 If you have enabled source routing on some other circuit the first window to appear is the DLSw Basic Interface Parameters window Figu on Cancel OK Values Help SR Internal LAN ID SR Bridge ID DLSw Virtual Ring ID hex DLSw Reject Unconfigured Peers ACCEPT DLSw RFC Version RFC1434 DLSw NetBIOS Support NO DLSu Peer IP Address add only Figure 4 2 DLSw Basic Global Parameters Window for SRB See Configuring Bridging Services for detailed information about configuring the following source routing parameters e SR Internal LAN ID SR Bridge ID 303523 A Rev 00 4 9 Configuring DLSw Services Adding Source Routing Parameters for Frame Relay BAN When you configure DLSw over Frame Relay BAN the Frame Relay SNA Connection window Figure 4 3 allows you to specify the type of encapsulation formats to be used on the Frame Relay interface a Select BNN RFC 1490 or BAN LLC SRB Figure 4 3 Frame Relay SNA Connection Window To configure Bay Networks proprietary SRB over Frame Relay using the RFC 1490 Bridging Standard 1 Click on BAN The DLSw Basic Global Parameters window opens refer to Figure 4 2 2 Edit the SR Internal LAN ID and SR Bridge ID parameters See Configuring Bridging Services for detailed information about configuring the source routing parameters Setting the DLSw Basic Interface Parameters
170. ion on the Bay Networks SDLC implementation see Configuring SDLC Services Primary SDLC Support A Bay Networks router configured as a primary device on an SDLC link can e Control the data link e Issue commands Initiate error recovery procedures e Serve as a PU 1 0 PU 2 0 or PU 2 1 device 303523 A Rev 00 1 17 Configuring DLSw Services The primary link station addresses and sends command frames to any or all secondary link stations on the network Each frame carries the individual or group address of the station or stations to which the frame is directed A secondary link station receives commands and responds to primary link station polls In both single and dual switch to switch networks you must map the addresses of the SDLC devices to Token Ring 802 5 addresses To map the addresses you configure the SDLC devices as local devices enabling them to appear to the network as natively attached LAN devices Chapter 5 describes how to configure local devices Figure 1 8 illustrates DLSw single and dual switch networks where Bay Networks routers perform as primary SDLC nodes CI mE Cluster controller NetBIOS Ed server m Token Ring LJ LLC2 SDLC Frame Relay backbone E LI Ethernet LLC2 Bay Networks router LLC2 SNA Bay Networks router processor I o Frame Relay only Token Ring
171. ions associated with specific NetBIOS names or MAC addresses These addresses augment any information that the router s MAC and NetBIOS caching mechanisms learn dynamically Static entries can exist in two tables e Default MAC Peer IP Table Each entry contains a MAC address and the IP address of a DLSw peer that can forward packets to this MAC address e Default NetBIOS Peer IP Table Each entry contains the NetBIOS name and the IP address of the DLSw peer to which this Net BIOS device is connected In the local router s Default NetBIOS Peer IP Table enter the IP address of the remote peer associated with any remote NetBIOS application that you need to reach through DLSw services Each entry in this table associates the name of a NetBIOS client with the IP address of the DLSw peer that can reach that client In the router s Default MAC Peer IP Table enter the peer IP address of the DLSw peer associated with any remote SNA system or application that you need to reach through DLSw services Each entry in this table associates the MAC address for an SNA system with the IP address of the DLSw peer that can reach that system Unlike dynamically learned entries statically defined entries remain until you delete them from the Default NetBIOS Peer IP Table or the Default MAC Peer IP Table See Chapter 5 for more information about editing the Default NetBIOS Peer IP Table and the Default MAC Peer IP Table 303523 A Rev 00 3 21
172. l Link Control request header routing information field receiver not ready receiver ready permanent virtual circuit service access point Synchronous Data Link Control Systems Network Architecture source route bridging Switch to Switch Protocol transmission header Transmission Control Protocol Internet Protocol virtual telecommunications access method exchange identification Bay Networks Technical Publications You can now print Bay Networks technical manuals and release notes free directly from the Internet Go to support baynetworks com library tpubs Find the Bay Networks product for which you need documentation Then locate the specific category and model or version for your hardware or software product Using Adobe Acrobat Reader you can open the manuals and release notes search for the sections you need and print them on most standard printers You can download Acrobat Reader free from the Adobe Systems Web site www adobe com xxii 303523 A Rev 00 Preface You can purchase Bay Networks documentation sets CDs and selected technical publications through the Bay Networks Collateral Catalog The catalog is located on the World Wide Web at support baynetworks com catalog html and is divided into sections arranged alphabetically e The CD ROMs section lists available CDs e The Guides Books section lists books on technical topics e The Technical Manuals section lists available printed
173. llows 1 Applies filter rules 2 Stamps packets with a queue number 3 Places packets in appropriate queues 303523 A Rev 00 6 3 Configuring DLSw Services The router holds packets in the assigned priority queue according to how you configure DLSw protocol prioritization Based on the needs of your site you can configure up to ten queues QO to Q9 for each DLSw peer For example you can assign a separate queue for each filter criterion for specific address ranges or for particular DLSw peers When you enable DLSw protocol prioritization you distribute the available bandwidth for a configured DLSw peer among its priority queues The combined bandwidth of each peer s queues totals 100 percent By default there are two DLSw priority queues QO receives 60 percent of the bandwidth and Q1 receives 40 percent Nonordered Queues Although Site Manager numbers the DLSw priority queues the queue number hierarchy does not determine priority You configure both the number of queues for each DLSw peer and the percentage of bandwidth assigned to each queue For example you can assign 50 percent of available bandwidth to Q3 and 25 percent each to Q1 and QO The Dequeuing Process The algorithm for DLSw bandwidth allocation is called weighted dequeuing With weighted dequeuing packets at the front of the protocol prioritization queues enter a dequeue list and receive a weighted score Packets with the lowest score are transmitt
174. local router can establish a TCP connection with this backup peer if the primary peer is unreachable Type the end time in hhmm format where hh is hours and mm is minutes For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight The Backup End Time parameter is disabled if the Backup Start Time is set to 0 1 3 6 1 4 1 18 3 5 1 5 15 1 10 Editing DLSw Traffic Filters and Protocol Prioritization For information about how to access and configure traffic filters and protocol prioritization for DLSw services refer to Chapter 6 Deleting DLSw from a Node You can delete DLSw from a node entirely To delete DLSw begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt Delete DLS A confirmation window appears Click on OK The Configuration Manager window appears DLSw is no longer configured on the router 5 76 303523 A Rev 00 Chapter 6 Using DLSw Prioritization This chapter provides guidelines for implementing DLSw TCP level prioritization Following an overview of DLSw protocol prioritization later sections describe how to use Configuration Manager when e Configuring Default Priority Queues e Configuring Peer Specific Priority Queues e Creating DLSw Priority Filters and that the Peer Table is complete For information about configuring a circuit with DLSw and setting the slot peer and SAP parameters refer to the earlier chapters i
175. lt Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Max Queue Buffers for Unconfig Peers 50 10 to 2147483647 Specifies the maximum number of packets in each default queue Enter a number of packets to increase or decrease the default buffer size of 50 packets 1 3 6 1 4 1 18 3 5 1 5 1 21 Max Queue Size for Unconfig Peers 16000 5000 to 2147483647 Specifies the maximum size in bytes of each default queue Enter a number of bytes to increase or decrease the default queue size of 16000 bytes 1 3 6 1 4 1 18 3 5 1 5 1 22 Default Bandwidths 60 40 0 0 0 0 0 0 0 0 Ten entries one per queue of a percentage between 0 and 100 Determines the number of default queues and allocates the bandwidth for each Either accept the default of 60 percent in QO and 40 percent in Q1 or enter up to ten values one for each queue Separate each bandwidth percent with a comma The bandwidth percentages must total 100 percent On low speed lines running NetBIOS you should allocate 20 percent of the total bandwidth due to endstation timing For example the following allots 10 percent of the bandwidth to each of ten queues 10 10 10 10 10 10 10 10 10 10 1 3 6 1 4 1 18 3 5 1 5 1 19 6 14 303523 A Rev 00 Using DLSw Prioritization Configuring Peer
176. lticasting refer to Chapter 4 303523 A Rev 00 3 23 Chapter 4 Starting DLSw This chapter describes how to enable DLSw services It assumes that you have read Configuring and Managing Routers with Site Manager and completed the following steps 1 Opened a configuration file 2 Specified router hardware if this is a local mode configuration file 3 Selected the connector on which you are enabling DLSw When you enable DLSw you must specify some parameters the Configuration Manager supplies default values for the others If you want to edit the other parameters see Chapter 5 Editing DLSw Parameters Appendix A provides a quick reference to the default DLSw parameter settings You may want to review these settings before editing your DLSw configuration Starting DLSw on an Interface To start DLSw on an interface begin at the Select Protocols window and select DLSw The Select Protocols window appears after you select a connector on which you are configuring DLSw The steps you take to enable DLSw services depend on whether you are starting DLSw for the first time or a subsequent time 303523 A Rev 00 4 1 Configuring DLSw Services Starting DLSw the First Time When you first start DLSw you use Site Manager to edit parameters that DLSw requires before it can process network traffic Depending on the type of network interface you are configuring DLSw displays a series of screens Table 4 1 lists ea
177. luded with the software is a template flt file that contains two sample DLSw protocol prioritization templates that you can use for differentiating SNA and NetBIOS traffic To use the sample templates copy usr wf template template flt to the directory from which you start Site Manager your Site Manager working directory If that directory already contains a template flt file copy the contents of the latest file into your existing file The sample templates place SNA traffic in the default queue Q0 and NetBIOS traffic in Q1 Using the default queue configuration QO receives 60 percent of the bandwidth and NetBIOS receives 40 percent of the bandwidth The section Creating DLSw Priority Filters earlier in this chapter lists the steps for creating filters from these or similar templates 303523 A Rev 00 6 31 Appendix A DLSw Default Settings Tables A 1 to A 11 list the default settings for DLSw parameters Use the Configuration Manager to edit the default settings Table A 1 DLSw Basic Global Parameters Parameter Default DLSw Virtual Ring ID None Reject Unconfigured Peers Accept DLSw RFC Version RFC 1434 DLSw NetBIOS Support No DLSw Peer IP Address add only 0 0 0 0 none Table A 2 DLSw Basic Interface Parameters Parameter Default SR Interface Ring ID 0x0 DLSw Slot IP Address 0 0 0 0 none 303523 A Rev 00 A 1 Configuring DLSw Services Table A 3
178. ly in RFC 1795 with additional enhancements defined in DLSw Version 2 and RFC 2166 DLSw resolves the issues associated with transporting SNA and NetBIOS information across a multiprotocol backbone Specifically DLSw Prevents sessions from timing out due to slow network response time Automatically reroutes traffic around failed links Improves response time by reducing network overhead Enables multiple locations to interconnect without requiring a network manager to reconfigure existing bridges Additionally the Bay Networks DLSw implementation provides several benefits including Bay Networks symmetric multiprocessor architecture providing a highly scalable and reliable implementation Advanced flow control ensuring that the router based network delivers information as reliably as existing SNA networks Integrated SDLC to LLC2 conversion enabling the customer to reduce the cost of front end processor FEP ports for example 3745 maintenance and software RFC 1490 LLC2 over Frame Relay support enabling a Bay Networks router to communicate across a Frame Relay network directly to a front end processor or other device that supports this protocol DLSw prioritization allowing preferred DLSw traffic to receive higher priority than other traffic The Bay Networks DLSw implementation is fully interoperable with RFC 1434 RFC 1795 and RFC 2166 DLSw implementations 303523 A Rev 00 Data Link Switching Overview DLSw
179. materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In addition the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure that may incorporate by reference certain limitations and notices imposed by third parties ii 303523 A Rev 00 Bay Networks Inc Software License Agreement NOTICE Please carefully read this license agreement before copying or using the accompanying software or installing the hardware unit with pre enabled software each of which is referred to as Software in this Agreement BY COPYING OR USING THE SOFTWARE YOU ACCEPT ALL OF THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT THE TERMS EXPRESSED IN THIS AGREEMENT ARE THE ONLY TERMS UNDER WHICH BAY NETWORKS WILL PERMIT YOU TO USE THE SOFTWARE If you do not accept these terms and conditions return the product unused and in the original shipping container within 30 days of purchase to obtain a credit for the full
180. munication subsystem For example the SAP associated with NetBIOS is OxFO MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 4 1 2 Editing a DLSw SAP Table Entry You can edit only the SAP Window flow control parameter associated with an existing DLSw SAP Table entry Note After you add an entry to the DLSw SAP Table Site Manager disallows any attempt to edit the SAP address associated with that entry To change the address of an existing DLSw SAP you must delete the entry in the DLSw SAP Configuration window and then add a new SAP with the new address Refer to the preceding section Adding a DLSw SAP Table Entry for information about how to add a new DLSw SAP 303523 A Rev 00 5 43 Configuring DLSw Services To edit the SAP Window parameter associated with a particular DLSw SAP begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt SAP Table The DLSw SAP Configuration window appears Figure 5 18 2 Select the DLSw SAP Table entry to edit 3 Click on the SAP Window parameter box and enter a new value 4 Click on Apply to save Done Add Delete Apply Values Help fak A SAP Window Figure 5 18 Saving the Edited SAP Window Setting 5 Click on Done You return to the Configuration Manager window Following is a description of the SAP Window parameter 5 44 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range
181. n 2 0 mode only When set to UDP the router does not make any attempts to revert to RFC 1795 An unknown peer operates in DLSw Version 2 0 mode Unless a TCP connection already exists the local peer uses UDP explorer frames to locate the remote peer MAC address prior to establishing the connection The unknown peer can revert to RFC 1795 if there is no response to the UDP explorer frames Click on Values and select TCP UDP or Unknown If you select Unknown use the SNA Fallback Attempts parameter to set the number of connection attempts using UDP explorer frames before reverting to earlier RFCs 1 3 6 1 4 1 18 3 5 1 5 5 1 10 303523 A Rev 00 5 29 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Backup Config No Yes No Enables the parameters that allow you to configure a backup peer Click on Values and select Yes or No 1 3 6 1 4 1 18 3 5 1 5 5 1 11 Backup IP Address 0 0 0 0 Any valid 32 bit IP address of the form network host using dotted decimal notation Specifies the IP address of a backup DLSw peer and adds the peer to the DLSw Backup Peer IP Table A backup peer receives all DLSw related broadcast frames for a given router or network processor if the primary peer router is
182. n Add The DLSw NetBIOS Configuration window appears Figure 5 21 303523 A Rev 00 5 47 Configuring DLSw Services Het DOS Hame Hethi Peer ip Address Figure 5 24 DLSw NetBIOS Configuration Window 2 Type the name of the remote NetBIOS client or server This is the client or server that you want to reach via DLSw services 3 Type the IP address of the remote DLSw peer This is the IP address of the DLSw peer that can reach the NetBIOS client or server you identified with the NetBIOS Name parameter 4 Click on OK This saves your entry to the router configuration file The DLSw NetBIOS Peer Configuration window reappears with the new entry in the list of existing NetBIOS peers refer to Figure 5 20 Following are descriptions of the NetBIOS Name and NetBIOS Peer IP Address parameters 5 48 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID NetBIOS Name None Any valid NetBIOS name Specifies the name of the remote NetBIOS client server or application that you want to reach via DLSw services Enter the name of the remote NetBIOS client or server station or application that you want to reach via DLSw services 1 3 6 1 4 1 18 3 5 1 5 11 1 2 NetBIOS Peer IP Address None Any valid 32 bit IP address in the form network host using dotted d
183. n this manual Note This chapter assumes that DLSw is already configured on an interface gt Protocol Prioritization Overview Outbound traffic filters act on packets that the router sends on a synchronous interface to a wide area network Outbound traffic filter actions let you direct traffic into delivery queues of varying precedence Applying a priority queue action to an outbound filter is called protocol prioritization These outbound filters are often called priority filters As a router operates network traffic from a variety of sources converges at an interface Without protocol prioritization the router transmits packets in a first in first out FIFO order Site Manager s protocol prioritization features allow you to instruct the router to use a different transmit order for specified ranges of packets on an individual interface 303523 A Rev 00 6 1 Configuring DLSw Services With protocol prioritization the router sorts traffic into queues according to priority filters that you configure For most traffic you configure priority filters on an outbound interface If a queue is full or you have configured an outbound drop filter the router discards clips the traffic For DLSw traffic you can also create priority queues for DLSw peers the router cannot clip DLSw traffic The router holds the sorted packets in priority queues It then uses a dequeuing allocation algorithm to drain the queues and transmit traffic
184. nation for any reason Licensee will immediately destroy or return to Bay Networks the Software user manuals and all copies Bay Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license 8 Export and Re export Licensee agrees not to export directly or indirectly the Software or related technical data or information without first obtaining any required export licenses or other governmental approvals Without limiting the foregoing Licensee on behalf of itself and its subsidiaries and affiliates agrees that it will not without first obtaining all export licenses and approvals required by the U S Government i export re export transfer or divert any such Software or technical data or any direct product thereof to any country to which such exports or re exports are restricted or embargoed under United States export control laws and regulations or to any national or resident of such restricted or embargoed countries or ii provide the Software or related technical data or information to any military end user or for any military end use including the design development or production of any chemical nuclear or biological weapons 9 General If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction the remainder of the provisions of this Agreement shall remain in full force and effect This Agreement will be governed by the laws of t
185. nds greater than 20 Specifies the maximum number of seconds that inactive MAC addresses can exist in the MAC to DLSw mapping cache Enter an interval to limit the amount of memory that inactive MAC cache entries consume for DLSw services on the router 1 3 6 1 4 1 18 3 5 1 5 1 11 NetBIOS Cache Age 300 Any number of seconds greater than 20 Specifies the maximum number of seconds that inactive NetBIOS names can exist in the NetBIOS to DLSw Peer mapping cache Enter an interval to limit the amount of memory that inactive NetBIOS cache entries consume for DLSw services on the router 1 3 6 1 4 1 18 3 5 1 5 1 12 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Reject Unconfigured Peers Accept Accept Reject Specifies whether DLSw peers in this router should allow Accept or disallow Reject TCP sessions with other DLSw peers not defined in the DLSw Peer Table Select Accept if you want to allow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Select Reject if you want to disallow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Disallowing TCP sessions prevents the router from learning the IP addresses of other peers in the network 1 3 6 1 4 1 18 3 5 1 5 1 13 DLSw RFC Version RFC1434 RFC1434
186. ne Options Standard MSB Token Ring MAC addresses Function X Provides the remote MAC address mapping outgoing requests for this MAC address corresponding to the DLCI value The remote MAC address must be unique with only DLCI mapping for the specific MAC address Instructions Enter the remote MAC address of the host If you need to specify the real MIB Object ID hardware address of the host enter it as an octal string 1 3 6 1 4 1 18 3 5 1 6 9 1 5 303523 A Rev 00 Starting DLSw Parameter Local MAC Default None Options Standard MSB Token Ring MAC addresses Function Provides the local MAC address mapping incoming requests on this DLCI to that address The Local MAC address must be unique with only DLCI mapping for the specific MAC address Instructions Enter the MAC address of the recipient MIB Object ID 1 3 6 1 4 1 18 3 5 1 6 9 1 4 Adding SDLC Line Parameters and Local Devices To configure DLSw on synchronous interfaces COM1 COM2 and so on using the SDLC protocol 1 Select SDLC from the WAN protocols window The Configuration Manager displays the SDLC Line Parameters window Figure 4 8 SDLC Line Parameters Cancel 0K Values Help Clock Source INTERNAL Internal Clock Speed 19200 Sync Line Coding NRZ Cable Type R5232 RTS Enable JEISABLE Figure 4 8 SDLC Line Parameters Window 303523 A Rev 00 4 15 Configuring DLSw Services 2 Parameter Default
187. network management software see Configuring and Managing Routers with Site Manager For a complete description of all warning fault trace and informational messages refer to Event Messages for Routers For information on viewing events using the Technician Interface see Using Technician Interface Software Enabling Extended Logging Subsystems such as LLC and SDLC allow you to enable extended logging through the MIB Extended logging provides additional messages and information that can help you identify and troubleshoot a DLSw network problem However using extended logging causes the router to use more log space and memory and affects CPU performance You enable extended logging using the Bay Networks Technician Interface Table C 1 lists each subsystem the Technician Interface command that enables extended logging for that subsystem and type s of messages or events that could appear in the log Table C 1 Extended Logging Commands for Subsystems Subsystem How to Enable Items Logged DLS s wfDIs 14 0 Oxffffffff commit DLSw protocol and data s wfDls 15 0 0x3 committ link control events leading to connection state changes LLC s wfLIcInterfaceEntry 2 cct Ocfff1 commit LLC inbound and outbound packets SDLC s wfSdlcPortAdminEntry 36 cct 0x1 commit SDLC messages Enabled by default T DLS LLC and SDLC extended logging set by Technician Interface only With extended logging enabled log message
188. never the destination SAP address identified in a TEST frame received from the local circuit already exists in the router s DLSw configuration In this case only the DLSw interface e Captures the locally received TEST frame e Attempts to locate the destination SAP address specified in that frame 2 6 303523 A Rev 00 DLSw Implementation Notes The transparent bridge interface on the same circuit with DLSw never sees TEST frames that contain destination SAP addresses intended for DLSw Figure 2 4 However SAP addresses intended for DLSw can pass from one local Ethernet interface to another over DLSw Therefore non DLSw SAPs will be transparently bridged between transparent bridge interfaces while DLSw forwards SAPs between interfaces You configure transparent bridge services independently of DLSw services on the router as appropriate for the topology of your network Router Forward to DLSw Bridge packet SAP defined to DLSw Forward to bridge DLS0029A Figure 2 4 DLSw and Transparent Bridging on Ethernet 802 3 Circuits DLSw with Translation Bridge The router supports DLSw and translation bridge services on an Ethernet 802 3 circuit Figure 2 5 You configure translation bridge services independently of DLSw services on the router as appropriate for the topology of your network To an end user system on an SRB circuit the translation bridge looks like a source routing bridge To an end user sys
189. nfig Peers parameter 6 14 Max Queue Buffers parameter 6 21 Max Queue Size for Unconfig Peers parameter 6 14 Max Queue Size parameter 6 22 Max Slot Sessions parameter 2 10 3 4 5 13 MAXDATA parameter 4 29 5 67 Maximum Package Size parameter 5 16 MAXOUT parameter 4 28 5 67 memory requirements 2 10 Multicast IP Address parameter 4 38 5 72 Multicast IP Slots parameter 4 38 5 73 Index 3 multiple DLSw peers 2 10 Multislot Broadcasts parameter 5 17 N NetBIOS Cache Age parameter 5 14 NetBIOS Fallback Time parameter 5 21 NetBIOS Name parameter 5 49 NetBIOS Peer IP Address parameter 5 49 NetBIOS Session Alive Filter parameter 5 18 NetBIOS sample template 6 24 6 31 P packaging configuring 5 16 multiple DLSw frames 2 13 Packaging Threshold parameter 5 17 Packaging Timeout parameter 5 16 parallel data paths in SRB topology 2 9 using 2 9 peer IP address 3 12 Peer IP Address parameter 4 8 5 7 5 34 peer IP entries adding 5 32 peer IP entries deleting 5 36 peer types TCP 3 13 UDP 3 13 Unknown 3 13 peer DLSw configuring queues 6 15 peers configured 5 1 learning mechanism 3 20 multiple 2 10 performance and DLSw packaging 2 13 PP for Unconfigured Peers parameter 6 13 primary link stations 1 17 primary SDLC operations 1 17 Index 4 prioritization Max Queue Size parameter 6 22 Protocol Priority parameter 6 21 queue depth 6 7 priority queues S
190. ngestion Control sees 6 7 HN DS UW sisaan eaa a e a eeir ia i aaa anadah 6 7 Configuring Default Priority CUBS ccc iccsntatantrscrnsantateaciatitaandelitiiacdabtiacsieuieteananiits 6 8 Enabling the Default Queues for Configured and Unconfigured Peers 6 9 Customizing the Default Queue Configuration eecceeeesscceceeeeseceeeeeneeeeeeeeenteees 6 11 DLSw Protocol Prioritization Parameter Descriptions sss 6 12 Configuring Peer Specific Priority QUOUGS ccecccsieun cicer ee eire sti pea sa tuts 6 15 Priority Queues for a Specific DLSw Pear sercis 6 15 Enabling or Disabling a Single Peer s Priority Queues n se 6 19 Customizing Specie DESw Peer QUOUGS root rennen tne tn rhe nicae 6 20 Peer Queue Configuration Parameter Descriptions sssssssssss 6 21 Creating DLSw Priority Filters aoc rp ti n Eprr bi ae ark Ur P CA pe pr pe bI iinne nana 6 22 Using the DLSw Peer Configuration Window riu ASA APA A RUNE EDD ud 6 30 Sample Templates for DLSw Protocol Prioritization eeeeeeeeeesssss 6 31 Appendix A DLSw Default Settings x 303523 A Rev 00 Appendix B Criteria for DLSw Prioritization Predetued DLS ONERE ase eases er cic De rid a esto EA P qe E ciet Da td a hue V e PRU p t B 2 DLSW PISS deii CREE B 2 Specilying MAC Address Rangos m B 4 Source Routing Bridge Source MAC Addresses
191. o disable the Backup Start Time parameter 1 3 6 1 4 1 18 3 5 1 5 15 1 9 Backup End Time hhmm 2400 1 to 2400 Specifies the end time when a configured backup peer is available During this time period the local router can establish a TCP connection with this backup peer if the primary peer is unreachable Type the end time in hhmm format where hh is hours and mm is minutes For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight The Backup End Time parameter is disabled if the Backup Start Time is set to 0 1 3 6 1 4 1 18 3 5 1 5 15 1 10 303523 A Rev 00 4 41 Chapter 5 Editing DLSw Parameters This chapter describes how to edit DLSw basic and advanced global and interface parameters as well as how to add edit and delete the following configuration objects e Configured peers e Slots e SAPs e Default NetBIOS peers e Default MAC peers e Local devices This chapter also describes how to delete DLSw services from all circuits simultaneously The Site Manager sequence for adding the first DLSw interface to your router configuration requires you to define an initial set of DLSw configured peers slots and SAPs Using the Parameter Descriptions Each DLSw parameter description provides information about default settings valid parameter options the parameter function instructions for setting the parameter and the Management Information Base MIB object ID The Technician Inte
192. occurs the router forwards the frame only to the DLCI specified If no entry is found then the information is not forwarded out this interface as a BNN packet See Configuring LLC Services for more information about the Frame Relay Mapping Table Boundary Access Node BAN BAN frames use a standard RFC 1490 Bridged 802 5 Over Frame Relay format Since this is a source routed frame you must enable SRB on this interface When you select BAN SRB is automatically enabled and you must configure it Specifically e If SRB has not been previously configured on the router the SRB Global Parameters screen appears e The SRB Interface Parameters screen appears See Configuring Bridging Services for more information about configuring SRB 303523 A Rev 00 3 19 Configuring DLSw Services Configuring Predefined MACs and Names Bay Networks routers in your network learn about the locations of remote NetBIOS and SNA systems that are accessible through DLSw services in two ways e Through a dynamic process where DLSw inspects incoming frames to learn the location of remote endstations This is a DLSw default mechanism e Through static definitions where the network administrator defines the location of NetBIOS and SNA systems attached to remote LANs Static definitions are never required but may be used to reduce the amount of broadcast messages traversing the network Dynamically Learned Remote Systems Bay Networks routers
193. ol layer LLC2 or WAN e External link 1 External link 2 Key VCCT virtual circuit Figure 1 14 Boundary Function Virtual Circuit DLS0036A APPN and DLSw send and receive messages on external links 1 and 2 and pass messages to each other through the virtual circuit The DLSw APPN boundary function allows DLSw to provide remote communications via an IP backbone and provide access over this backbone from enterprise level applications using an APPN network 303523 A Rev 00 1 27 Configuring DLSw Services In Figure 1 15 router 1 is running the DLSw APPN boundary function Router 2 is running DLSw only The path between the host on router 1 and the PU2 0 device on router 2 passes through all the components involved in a communication between the host and the device DLUR a component within APPN is required because the 3174 system is configured as PU2 0 DLSw APPN DLSw router 1 router 2 g TCP IP TCP IP APPN DLSw DLSw LLC2 ccr j SDLC LLC2 Host 3174PU2 0 Key DLUR dependent logical unit requestor Figure 1 15 End to End Connection Using a DLSw APPN Router and a DLSw Router DLS0037A 1 28 303523 A Rev 00 Data Link Switching Overview DLSw Backup Peer Support If a TCP connection to the primary peer cannot be established DLSw can establish a TCP connection to a backup peer if one is configured When DLSw starts up if a TCP connection to the primary peer cannot be establi
194. olution The DLSw interface state is DOWN Physical interface not up DLC interface not up Check the connections make sure that the physical interface is up Check the DLC configuration and delete the interface if necessary notify Bay Networks The DLC interface is DOWN Physical interface not up Check the connections make sure that the physical interface is up The DLSw interface is DOWN the LLC interface is UP DLSw interface configured on a different slot than physical interface DLSw interface different than corresponding LLC wfLlciInterfaceEntry wfLicin terfaceLlc2Cc Potential LLC problem if not notifying DLSw that it is present Check and correct the configuration to ensure that DLSw is configured on the same slot as the physical interface Correct the configuration DLSw must be configured on the slot where DLC termination occurs Delete the LLC interface contact Bay Networks Ethernet interfaces drop sessions from Token Ring interfaces Frames sent to Ethernet are larger than 1500 bytes Set the DLSw Virtual Ring MTU parameter to 1518 or less on any routers with Token Ring Ethernet sessions establish with difficulty Loops formed by dual router Ethernet connections Two DLSw routers connected to an Ethernet segment must have filters to avoid loops 303523 A Rev 00 C 23 Configuring DLSw Services Table C 8 TCP Troubles
195. on DLSw prioritization allows you to prioritize traffic within DLSw based on predefined or user defined fields Examples of DLSw prioritization criteria include 303523 A Rev 00 1 29 Configuring DLSw Services Source and destination SAP Use this field to assign NetBIOS traffic SAP OxFO to a lower priority than SNA traffic Source and destination MAC address Use this field to provide host bound traffic preference over other traffic Any field in the SNA Transmission Header TH and Response Request Header RH Use this field to provide Class Of Service COS priority preference You can also prioritize traffic based on any values within the headers and data packets For detailed information about DLSw prioritization refer to Chapter 6 Using DLSw Prioritization Protocol Prioritization You can use protocol prioritization to transmit DLSw traffic before other traffic on an individual synchronous line interface You can prioritize specific types of DLSw traffic such as Ethernet Frame Relay SDLC Token Ring Other SRB traffic Note You can apply both circuit level and TCP level prioritization to DLSw traffic Note that TCP level prioritization alone does not give DLSw traffic precedence over other routing protocols For information about circuit level prioritization refer to Configuring Traffic Filters and Protocol Prioritization For More Information About DLSw The following publications provi
196. on if there are no active TCP sessions between the routers The software overrides the Backup Max Up Time parameter setting only if there is an active non idle TCP connection with data transferring between the routers Type a value in the range 0 to 999999 Specify 0 to disable the Backup Max Up Time parameter 1 3 6 1 4 1 18 3 5 1 5 15 1 7 Backup Hold Down Time sec 120 0 to 2147483647 Specifies the time to wait in seconds after the primary peer is declared unreachable before the local router initiates a TCP connection to the backup peer The hold down time ensures that the primary peer has enough time to respond to a TCP connection request before the local router initiates a TCP connection to the backup peer Accept the default 120 or click on the Values button and specify a different value 1 3 6 1 4 1 18 3 5 1 5 15 1 8 4 40 303523 A Rev 00 Starting DLSw Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Backup Start Time hhmm 1 0 to 2400 Specifies the start time when a configured backup peer is available During this time period the local router can establish a TCP connection with this backup peer if the primary peer is unreachable Type the start time in hhmm format where hh is hours and mm is minutes For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight Type 0 t
197. or gt vertical line Acronyms APPN BAN BNI BNN DLSw DLCI FDDI FEP FRAD Indicates file and directory names new terms book titles and variables in command syntax descriptions Where a variable is two or more words the words are connected by an underscore Example If the command syntax is show at lt valid_route gt valid_route is one variable and you substitute one value for it Indicates system output for example prompts and system messages Example Set Bay Networks Trap Monitor Filters Shows menu paths Example Protocols gt IP identifies the IP option on the Protocols menu Separates choices for command keywords and arguments Enter only one of the choices Do not type the vertical line when entering the command Example If the command syntax is show ip alerts routes you enter either show ip alerts or show ip routes but not both Advanced Peer to Peer Networking Boundary Access Node Boundary Node Identifier Boundary Network Node data link switching data link connection identifier Fiber Distributed Data Interface front end processor Frame Relay Access Device 303523 A Rev 00 xxi Configuring DLSw Services FIFO IP LLC MAC MTU NCP QLLC RH RIF RNR RR PVC SAP SDLC SNA SRB SSP TH TCP IP VTAM XID first in first out Internet Protocol Logical Link Control media access control maximum transmission unit network control program Qualified Logica
198. oup address and assign the address to a DLSw slot 4 36 303523 A Rev 00 Starting DLSw The following procedure shows you how to add DLSw IP multicast support to a router that is already running DLSw Begin at the Configuration Manager window 1 10 Click on Protocols The Protocols menu opens Click on DLSw The DLSw window opens Click on Basic Global The DLSw Basic Global Parameter window opens Click on the DLSw RFC Version parameter Click on the Values button The Values window opens Click on RFC 2166 Multicast Then click on OK The Initial IGMP Global Configuration window opens if IGMP is not configured Set IGMP global parameters or accept the defaults and click Save The DLSw Multicast Configuration window opens Click on Add A second DLSw Multicast Configuration window opens Supply an IP multicast group address and associate the address with a slot or slots Click on OK The first DLSw Multicast Configuration window reopens Edit the parameters using the descriptions below If you want to enable the backup feature select Yes for the Backup Config parameter Click on Done The Configuration Manager window opens Following are descriptions of the DLSw multicast configuration parameters 303523 A Rev 00 4 37 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function
199. outer A Router A sends an XID T2 P to the host The host computer generates an SABME frame and sends it to Router A Router A returns UA and RNR frames back to the Host Router A then contacts Router B Router B accepts the CONTACT frame causing a state change Router B sends the Set Mode indication SNRM frame to SDLC 482 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 45 SSP contact frame rcvd in SDLC conn state flag 31619ea0 4 1 483 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 16 State change in ssp contact conn 31619ea0 old state 4 new state 3 484 07 12 95 08 48 08 DEBUG SLOT 1 SDLC Event Code 11 DLC IF SET MODE SEND MSG SDLC acknowledges the Set Mode indication UA 485 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 73 received SET MODE response from SDLC port 3171ad50 1s ref 3171e230 The DLSw circuit reaches the CONNECTED state Router A and Router B return receiver ready RR packets to their clients 486 07 12 95 08 48 08 DEBUG SLOT 1 DLS Event Code 16 State change in sdlc connected conn 31619ea0 old state 3 new tate 1 Disconnecting from the Network This section provides some sample log messages that occur when you disconnect from a DLSw network Included is a description of each event followed by the actual log message s A local endstation disconnects and generates a DISCONNECT frame The DISCONNECT frame causes a state chan
200. pical values are multiples of 4 1 3 6 1 4 1 18 3 5 1 5 12 1 7 303523 A Rev 00 4 27 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Destination Host MAC hex None Any standard MSB Token Ring MAC address Identifies with the Destination SAP the Token Ring or Ethernet host that the local device will reach via SDLC services This parameter must match the MAC address of the LAN gateway using MSB Token Ring format Consult your host system manager for the host MAC address then enter the 12 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 8 Destination Host SAP hex Ox4 0x01 to OxFE Identifies with the Destination MAC the Token Ring or Ethernet host that the local device will reach via SDLC services This parameter must be entered into the SAP Table of the source and destination routers The default 04 is included in the default SAP Table Consult your host system manager for the host SAP address Enter the Ox prefix followed by a 1 digit or 2 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 9 MAXOUT 7 1 to 127 Controls the maximum number of consecutive frames that an SDLC link station can send without acknowledgment Enter a value from 1 to 127 1 3 6 1 4 1 18 3 5 1 7 5
201. purchase price 1 License Grant Bay Networks Inc Bay Networks grants the end user of the Software Licensee a personal nonexclusive nontransferable license a to use the Software either on a single computer or if applicable on a single authorized device identified by host ID for which it was originally acquired b to copy the Software solely for backup purposes in support of authorized use of the Software and c to use and copy the associated user manual solely in support of authorized use of the Software by Licensee This license applies to the Software only and does not extend to Bay Networks Agent software or other Bay Networks software products Bay Networks Agent software or other Bay Networks software products are licensed for use under the terms of the applicable Bay Networks Inc Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software 2 Restrictions on use reservation of rights The Software and user manuals are protected under copyright laws Bay Networks and or its licensors retain all title and ownership in both the Software and user manuals including any revisions made by Bay Networks or its licensors The copyright notice must be reproduced and included with any copy of any portion of the Software or user manuals Licensee may not modify translate decompile disassemble use for any competitive analysis reverse engineer distrib
202. q Local Device First Local Device First Peer First Specifies the sequence of activation for SDLC PU2 0 fixed format primary devices LocalDeviceFirst specifies that DLS establishes a connection with the SDLC End Station first Once the local device responds successfully DLS then starts up the SSP connection to the peer PeerFirst specifies that DLS starts the SSP connection first and contacts the SDLC End Station only after receiving a CONTACT message from the peer Accept the default Local Device First or change to Peer First 1 3 6 1 4 1 18 3 5 1 5 12 1 12 4 32 303523 A Rev 00 Starting DLSw Configuring the DLSw APPN Boundary Function Configuring the DLSw boundary function involves the following tasks 1 2 3 4 Configuring DLSw and APPN on the router Creating a virtual circuit and adding a DLSw interface Obtaining an APPN interface to an existing virtual circuit Adding an APPN interface to an existing virtual circuit This section also describes how to disable and reenable the Boundary function Configuring DLSw and APPN Before you can configure the DLSw boundary function DLSw and APPN must be running on the same slot on the router Using Site Manager 1 Configure DLSw on a slot See Starting DLSw on an Interface earlier in this chapter for instructions Configure APPN on the same slot as DLSw You must supply information for the following APPN advanced global parameters e Defaul
203. quely identifies the station for statistics and Alert messages Type the 8 byte ASCII link station name 1 3 6 1 4 1 18 3 5 1 7 5 1 32 PU Type None T1 0 T2 0 T2 1 Specifies the type of the XID sending node This parameter is used with the IDBLOCK IDNUM and XID Format parameters to determine the station XID value Choose T1 0 T2 0 or T2 1 N A 5 62 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions IDBLOCK None Any 3 digit hexadecimal value Specifies the block number which must match the host s IDBLOCK parameter value that identifies incoming connection requests This parameter is used with the PU Type IDNUM and XID Format parameters to determine the station XID value Table 5 2 lists the IDBLOCK numbers Obtain the configured value at the host from VTAM or other host operating system for this device MIB Object ID N A Table 5 2 IDBLOCK Numbers for Switched PUs Device IDBLOCK Number NPSI 003 3770 004 3650 3680 005 6100 3790 006 NTO 3767 007 S 34 00E 3774 011 3x74 017 3276 018 8775 019 S 1 021 S 38 022 5520 031 5280 032 PC SRJE 03D S 36 03E 4680 04D continued 303523 A Rev 00 5 63 Configuring DLSw Services Table 5 2 IDBLOCK Numbers for Switched PUs continued Device IDBLOCK Number APPC PC 0
204. quirements DLSw provides buffering of LLC2 packets in single switch mode and additional buffering of TCP packets in dual switch mode Therefore DLSw can use a significant amount of memory To limit the memory consumption Bay Networks provides several mechanisms including e LLC2 Max Links parameter allowing the network administrator to limit the number of LLC2 stations per interface Refer to Configuring LLC Services e DLSw Max Slot Sessions parameter allowing the network administrator to limit the number of LLC2 stations per slot See Chapter 5 for instructions on accessing and editing the Max Slot Sessions DLSw global parameter For more information about DLSw memory usage contact the Bay Networks Technical Support Center 2 10 303523 A Rev 00 DLSw Implementation Notes TCP Considerations TCP timers allow you to configure DLSw to periodically give TCP data to transmit if a connection is inactive for a period of time The mechanism by which TCP determines a lost connection either a failed link with no rerouting possible or the remote router is unavailable is based on TCP attempts to deliver this data If TCP does not receive an acknowledgment after a series of retries it declares the connection down and informs DLSw DLSw then manages the currently active sessions There are four main configuration parameters associated with TCP timers e KeepAlive Time e KeepAlive Retry Timer e KeepAlive Retries e T
205. r change the default configuration of priority queues for configured and unconfigured DLSw peers This section shows how to Enable the default priority queues for all configured DLSw Peers Enable the default priority queues for unconfigured peers e Customize the default priority queue configuration Note This section assumes that DLSw is already configured on an interface and that the Peer Table is complete For information about configuring a circuit with DLSw and setting the slot peer and SAP parameters refer to earlier chapters 6 8 303523 A Rev 00 Using DLSw Prioritization Enabling the Default Queues for Configured and Unconfigured Peers Begin by displaying the DLSw Protocol Prioritization PP Global Parameters window 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound gt Global The Global DLSw PP Parameters Defaults window appears Figure 6 2 Note See the section Using the DLSw Peer Configuration Window later in this chapter for another way to access the Global DLSw PP Parameters Defaults window Global DLSw PP Parameters Defaults Cancel Values Help JE Protocol Priority PP FISABLED PP for Unconfigured Peers ENABLED Max Queue Buffers for Unconfig Peers 50 Max Queue Size for Unconfig Peers 16000 Default Bandwidths Q0 01 Q9 60 40 0 0 0 0 0 0 0 0 Figure 6 2 Global DLSw PP Parameters Defaults
206. r frames respectively and exclusively to establish connections with the peer router A peer that you define as Unknown causes the local router to use UDP explorer frames to locate the destination MAC address of the peer before establishing the TCP connection If the TCP connection cannot be made or if there is no UDP response DLSw performs fallback attempts to earlier RFC protocols to establish the connection If all connection attempts fail regardless of the RFC used a connection can be made to a configured DLSw backup peer described in the next section For information about configuring peer types and fallback attempts refer to the Transport Type and SNA Fallback Attempts parameters in Chapter 5 303523 A Rev 00 3 13 Configuring DLSw Services Backup Peers A backup peer receives all DLSw related broadcast frames for a given router or network processor if the primary peer router is unavailable or cannot be reached over a TCP connection When you specify the Backup IP Address DLSw places the entry in the Backup Peer IP Table There are seven Backup Peer IP Table parameters that allow you to manage a router that you want to use when the local router cannot connect to a primary DLSw peer e Backup IP Address e Backup Peer Type e Backup Max Up Time e Backup Hold Down Time e Backup Start Time e Backup End Time e Backup Delete For information about configuring backup peers refer to Chapter 5 Simplifying the Peer IP
207. r to the disabled inactive state Enable Reinitializes every DLSw interface on the router based on The current setting of the associated Enable parameter The current state of the associated circuit Select Disable to switch every DLSw interface existing on the node to the inactive state Select Enable to globally reinitialize all DLSw interfaces configured on the node 1 3 6 1 4 1 18 3 5 1 5 1 2 5 10 303523 A Rev 00 Editing DLSw Parameters Parameter TCP Window Size Default 8000 Range 5000 to 64000 octets Function Specifies in octets the maximum amount of DLSw data that the local and remote TCP entities can send before requiring an acknowledgment or can receive before acknowledging The TCP Window Size parameter informs DLSw about how much data can be outstanding on a TCP connection The size of the window affects performance latency flow control and memory usage A larger window causes less flow control to occur with a possible increase in latency Editing the TCP Window Size parameter affects new TCP session establishment only Existing sessions are unaffected Instructions Type any valid number of octets Generally networks with slower line speeds require smaller window sizes while networks with faster line speeds benefit from larger windows The default value is acceptable for most networks A TCP Window Size setting of 5000 octets may be appropriate for low speed lines or networks running
208. re different DLSw capable slots in the same router configuration Click on OK to save your entry to the configuration file The DLSw Slot Configuration window reappears refer to Figure 5 12 with the new entry added to the list of existing DLSw capable slots Following are descriptions of the DLSw Slot IP Table parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Slot None 1 to 14 Specifies the slot number that you want to associate with the IP interface address that you reserved for that slot Type a slot number from 1 to 14 depending on the e Type of node chassis e Slots that link modules can occupy 1 3 6 1 4 1 18 3 5 1 5 3 1 2 IP Address None Any valid 32 bit IP address in the form network host in dotted decimal notation Specifies an IP address associated with a specific DLSw peer slot in the router TCP uses this IP address for connections associated with that slot Type a valid IP address for the slot The IP interface need not reside on the DLSw capable slot Do not enter a value for every active slot in the router enter one IP address associated with one DLSw slot 1 3 6 1 4 1 18 3 5 1 5 3 1 3 5 38 303523 A Rev 00 Editing DLSw Parameters Editing a DLSw Slot IP Table Entry You can edit only the IP Address for TCP Connection parameter in an existing DLSw Slot IP Table entry
209. request for connection over UDP the backup peer can fall back to RFC 1795 mode e V20 Unicast UDP Send the request for connection over UDP one TCP connection is expected the backup peer cannot fall back to RFC 1795 mode e RFC 2166 Multicast Send the request for connection to the multicast address configured in the Backup IP Address field The Backup Peer Type cannot exceed the global DLS RFC type on the router For example if the DLSw global RFC type for the router is RFC 2166 Multicast the backup peer can be any of the available values If the RFC type is V2 0 Unicast the backup peer cannot be multicast If the RFC type is RFC 1795 the backup peer cannot be multicast V2 0 UDP V2 0 Unknown or V2 0 TCP For more instructions on configuring a backup peer for RFC 2166 Multicast refer to Chapter 4 For instructions on configuring a backup peer for the other DLSw versions see Chapter 5 303523 A Rev 00 Chapter 3 DLSw Configuration Overview This chapter provides general information about configuring DLSw on Bay Networks routers including Adding Single Switch DLSw Services Adding Dual Switch DLSw Services Configuring SDLC Lines and Devices Configuring DLSw over Frame Relay Configuring Predefined MACs and Names Configuring DLSw Packaging Configuring DLSw Prioritization Configuring DLSw Backup Peers Configuring DLSw for IP Multicast When you configure DLSw for sin
210. ress of a Token Ring interface on Slot 1 It is acceptable to use any other IP address existing on this router to represent this slot e Router B a remote site connected to the central site using Frame Relay is a single slot router running single switch DLSw The IP address of the Frame Relay interface represents this slot in the Slot Table e Router C a regional site connected to the central site using multiple links is a single slot router running dual switch DLSw The circuitless IP address represents this slot in the Slot Table Router A 192 32 10 1 LAN NetBIOS gateway Mainframe server x m3 A CN NetBIOS Jj client E i 3 AS 400 Router B 192 32 20 2 Router C 192 32 30 2 192 32 30 1 Frame Relay Frame Relay 192 32 40 1 192 32 40 2 Circuitless 192 32 200 1 Frame Relay Circuitless 192 32 100 1 Front end SDLC tL processor control unit Router B Router A Router C Slot Table Slot Table Slot Table 1 1 192 32 200 1 192 32 30 2 1 192 32 100 1 3 192 32 30 1 41192 32 10 1 Figure 3 4 Sample Network with Slot Table Definitions DLS0022A 303523 A Rev 00 3 11 Conf
211. returns you to the Configuration Manager window Editing DLSw Default NetBIOS Peer IP Table Parameters The Default NetBIOS Peer IP Table contains the list of all remote NetBIOS systems and applications that you can access via DLSw connection services on the local router Each entry that you define in the Default NetBIOS Peer IP Table associates the name of a NetBIOS client or server with the IP address of the remote DLSw peer that can reach that client or server You add edit and delete Default NetBIOS Peer IP Table entries in the DLSw NetBIOS Peer Configuration window To access the DLSw NetBIOS Peer Configuration window begin at the Configuration Manager window and select Protocols gt DLSw gt Default NetBIOS The DLSw NetBIOS Peer Configuration window appears Figure 5 20 showing a list of NetBIOS client and server names 5 46 303523 A Rev 00 Editing DLSw Parameters DLSw NetBIOS Peer Configuration fin4 Delete Apply Values Help S Default NetBios Peer IP Address 198 42 61 5 Ie Figure 5 20 DLSw NetBIOS Peer Configuration Window Clicking on a name in the list window causes the DLSw Peer IP address associated with that name to appear in the Default NetBIOS Peer IP Address parameter field Figure 5 20 Adding a DLSw Default NetBIOS Peer IP Table Entry To add a DLSw Default NetBIOS Peer IP Table entry from the DLSw NetBIOS Peer Configuration window refer to Figure 5 20 1 Click o
212. rface allows you to modify parameters by issuing set and commit commands with the MIB object ID This process is equivalent to modifying parameters using Site Manager For more information about using the Technician Interface to access the MIB see Using Technician Interface Software 303523 A Rev 00 5 1 Configuring DLSw Services Caution The Technician Interface does not verify that the value you enter for a parameter is valid Entering an invalid value can corrupt your configuration You may be required to customize the LLC2 TCP IP SDLC or SRB parameters as well since these support DLSw services on the router If so refer to one of the guides listed in Table 5 1 Otherwise you can access parameters of the DLSw support protocols from the Protocols menu of the Configuration Manager window or the Circuit Definition window Table 5 1 Customizing the DLSw Support Protocols Protocol Refer To TCP Configuring IP Utilities IP Configuring IP Services SRB Configuring Bridging Services LLC2 Configuring LLC Services SDLC Configuring SDLC Services Multicast DVMRP Configuring IP Multicasting and Multimedia Services MOSPF Configuring IP Multicasting and Multimedia Services Accessing DLSw Parameters To access and edit DLSw parameters begin at the Configuration Manager window Figure 5 1 and select Protocols DLSw 5 2 303523 A Rev 00 Editing DLSw Parameters
213. ritization parameters refer to Chapter 6 3 22 303523 A Rev 00 DLSw Configuration Overview Configuring DLSw Backup Peers When you configure a primary peer you can configure a peer to backup the primary peer connection The backup peer feature allows you to configure a backup peer IP address a maximum up time allowed for the backup connection a hold down time that indicates the amount of time to wait before considering that the primary connection is down and starting the backup connection and a time interval to ensure that no backup connection starts during a specified start and end time The backup peer feature uses the following parameters e Backup Config e Backup IP Address e Backup Peer Type e Backup Max Up Time sec e Backup Hold Down Time sec e Backup Start Time hhmm e Backup End Time hhmm For detailed information about accessing and configuring the DLSw backup peer parameters for an RFC 2166 multicast peer see Chapter 4 For detailed information about accessing and configuring the DLSw backup peer parameters for an RFC 1434 RFC 1795 or V2 0 peer see Chapter 5 Configuring DLSw for IP Multicast To configure DLSw for IP multicasting you must e Configure DLSw to run in RFC 2166 multicast mode e Enable IGMP e Supply an IP multicast group address Assign the IP address connected to the multicast network to a DLSw slot For detailed information about accessing and configuring DLSw IP mu
214. rte F ERR Fe P neben S Piae brr ba dun Ferran pe LR omae TO FAIF CONECTO UPS 1 6 RFG 2106 hglloast DUDDOU sreci aaa 1 6 Differences Between RFC 2166 and RFC 1795 ccisscccceroscceecmovereurenvicncmnnvivennwrnve 1 6 Configuring IP Multicast Protocols on the Router c eeeecceeeeeeeeeeeteeeeeneeaaees 1 7 Assigning an IP Multicast Group Address to a Slot ccecceeeeeeeeteeeeettetteeeeeeee D7 Sample Connection Using DLSw and IP Multicasting esses 1 9 DLSw Single Switch and Dual Switch Services sssssssssssseeee 1 11 Single Switch Services rtr riter nanus TM spies bei co eee APR R Pe stipite da aaa ret ANON e 1 14 cip RwzcEESePeoOn I M 1 14 GLLCAOGLLC2 Ku cci e T 1 15 Duab Scd SUISSE 1ooitiageuet ao tll Ti PRU as ER E FORE ug AARON Terre Terr rere 1 15 303523 A Rev 00 V SDLC UPO T M UU EU E 1 17 Fina GUL SUDO iussus quia enbbu Ue c pM ARD RAM bae tU ree KE ic ane USER 1 17 Seconda ODLO UP io T 1 19 Combining Primary and Secondary SDLG 1 5 nct rrr t roro deat ia 1 21 Fame Polay SUPPO saranoina n IE Boundary Network Node RFC 1490 EE E E E A E 1 23 Boundary ACOS NOGO AC 1 24 LLG SUPPO ec E DLOSWAPFN Boundary FURCIION e 1 24 DLSw APPN Network Configurations sues ise ern inherit inania 1 24 DLSWAPPN CGOMPpONEM S e RESULT a a DLUsWw Bacup Feet OPOTI nania A 1 29 DESS FRO oone D DS 1 29 LS Tiens e
215. runs on all Bay Networks router platforms using local and wide area network facilities including e LLC2 media including Ethernet Token Ring Frame Relay and ATM LANE e Other media using source route bridging SRB formats including FDDI SMDS Frame Relay Point to Point PPP and ATM RFC 1483 e SDLC links in point to point and multipoint configurations e X 25 links using the Qualified Link Level Control QLLC protocol You can use DLSw services to support connections between SNA and NetBIOS systems on one type of network such as Token Ring 802 5 and systems on different types of networks such as Frame Relay Note In this manual the term LAN refers to all SRB types of LANs and transparent bridge Ethernet 802 3 LANs SRB LANs include but are not limited to Token Ring 802 5 FDDI Ethernet 802 3 SMDS Frame Relay and other synchronous media protocols See Configuring Bridging Services for more information on the media that SRB supports RFC 1795 Differences Support RFC 1795 called DLSw Version 1 is an implementation of DLSw developed by a consortium of vendors RFC 1795 supersedes the original DLSw specification RFC 1434 Starting with Version 11 0 Bay Networks DLSw routers support RFC 1795 These routers are fully compatible with Bay Networks routers that support the original RFC 1434 specification with Version 10 0 or earlier software Between RFC 1795 and RFC 1434 Based on RFC 1434 RFC 1795 describes
216. s enough time to respond to a TCP connection request before the local router initiates a TCP connection to the backup peer Type a value in the range 0 to 2147483647 1 3 6 1 4 1 18 3 5 1 5 5 1 14 303523 A Rev 00 5 31 Configuring DLSw Services Parameter Backup Start Time hhmm Default 1 Options 0 to 2400 Function Specifies the start time when a configured backup peer is available During this time period the local router can establish a TCP connection with this backup peer if the primary peer is unreachable Instructions Type the start time in hhmm format where hh is hours and mm is minutes MIB Object ID For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight Type 0 to disable the Backup Start Time parameter 1 3 6 1 4 1 18 3 5 1 5 5 1 15 Parameter Backup End Time hhmm Default 1 Options 1 to 2400 Function Specifies the end time when a configured backup peer is available During this time period the local router can establish a TCP connection with this backup peer if the primary peer is unreachable Instructions Type the end time in hhmm format where hh is hours and mm is minutes MIB Object ID For example typing 0820 specifies 8 20 a m and 2400 specifies 12 00 midnight The Backup End Time parameter is disabled if the Backup Start Time is set to 0 1 3 6 1 4 1 18 3 5 1 5 5 1 16 Adding a DLSw Peer IP Table Entry To add a new DLSw Peer IP Table entry begin at the
217. s B i VTAM host NN VA ms VTAM host NN DLS0034A Figure 1 12 Data Center APPN Network 303523 A Rev 00 1 25 Configuring DLSw Services In Figure 1 13 the boundary function resides in a regional location This enterprise wide network has an APPN backbone The regional location connects to the backbone through an IP network PU2 0 APPN he APPN El s e VTAM host NN DLSw LS APPN APPN VA EC sp c El I c L L i VTAM host NN 7 oS B APPN VTAM host NN DLS0035A Figure 1 13 Enterprise APPN Network DLSw APPN Components APPN and DLSw pass messages back and forth by means of a virtual circuit VCCT at the data link level Figure 1 14 shows the relationship between APPN DLSw and the VCCT through which they exchange messages 1 26 303523 A Rev 00 Data Link Switching Overview Data link contr
218. s describing the frame flows and state transitions appear during the critical phases of each connection being established 303523 A Rev 00 Troubleshooting DLSw Table C 2 shows more detailed information about the enabling bits shown in Table C 1 Table C 2 Log Messages Debug Flag Description Enabling Bits Enable Value in Hex General Control and SSP Events 1 and 2 0x00000003 SDLC Events 3 0x00000004 1795 Peer and Capx 1434 Flow 4 0x00000008 Control SDLC Events 5 0x00000010 V2 0 Peer and Capx Events 6 0x00000020 Backup Peer Events 7 0x00000040 Test Table Lookup Results 29 0x10000000 SDLC and XID Information 31 0x40000000 SDLC LS Reference and DLS TCP 32 0x80000000 Protocol Priority Using and Decoding the DLSw Log This section provides general information about DLSw states and events as described in RFC 1434 and RFC 1795 DLSw states and events appear as numbers within the text of logged messages If a message contains the text old state 3 new state 1 the numbers 3 and 1 point to specific conditions in the DLSw state table Similarly a message containing the text event 3 points to a specific condition in the DLSw event table 303523 A Rev 00 C 3 Configuring DLSw Services Table C 3 lists the DLSw state names and numbers Table C 4 lists the DLSw events and numbers Refer to these tables when decoding messages in the DLSw
219. shed DLSw checks whether a backup peer IP address is configured and then initiates a new TCP connection to the backup peer The TCP connection to the backup peer remains established as long as it is needed or until the maximum up time period has expired in which case the TCP connection is brought down DLSw will bring down a backup peer connection if there are no established DLSw connections or if the DLSw connections are idle i e no data has passed If a TCP connection with the primary peer is established but then the primary peer goes down DLSw attempts to start another SNA session by sending a message to the primary peer If the TCP connection with the primary peer does not re establish the DLSw checks whether a backup peer is configured and then initiates a new TCP connection to the backup peer You can configure backup peers for the following DLSw versions RFC 1434 RFC 1795 DLSw Version 2 0 Unicast or RFC 2166 Multicast You select a version using the DLSw RFC Version parameter from the DLSw Basic Global Parameters window For instructions on using this parameter refer to Chapter 4 For instructions on configuring a backup peer for RFC 2166 Multicast refer to Chapter 4 For instructions on configuring a backup peer for the other DLSw versions see Chapter 5 DLSw Filtering Bay Networks provides two prioritization mechanisms that affect DLSw traffic e DLSw prioritization e Protocol prioritization DLSw Prioritizati
220. t DLUS Name e Default Backup DLUS Name Set the Max Send BTU Size and Max Receive BTU Size APPN advanced port parameters Set these parameters according to the size supported by the end device If you enable HPR support set these parameters to 768 or greater The DLSw APPN boundary function requires a setting of Enable for the Implicit DLUR parameter When you configure the DLSw APPN boundary function Site Manager automatically sets the Implicit DLUR parameter to Enable Make sure that this parameter is properly set For information about configuring APPN see Configuring APPN Services Creating a Virtual Circuit and Adding a DLSw Interface Begin at the Configuration Manager window 303523 A Rev 00 4 33 Configuring DLSw Services Click on Protocols The Protocols menu opens Click on DLSw The DLSw window opens Click on Boundary Function The Boundary Function window opens Click on Add VCCT Site Manager asks Do you want to create a new Virtual Circuit or use an existing one Click on OK to create a new virtual circuit and add a DLSw interface to the virtual circuit The VCCT Slot Configuration window opens Specify a slot for the virtual circuit you are creating The slot you choose for the virtual circuit must be the same slot on which DLSw and APPN are running Click on OK You return to the Configuration Manager window You have now created a virtual circuit and added a DLSw interface to
221. t Window eese 6 24 Selecting a Predefined DLSw Outbound Filter Criterion 6 25 Selecting the DLSw Queue Action iuuenem rm een 6 26 Liege Number YIGG Listes sequutus cit p rU tid pna to tebid deme dades iras i itu Create Filter WIBIQUW react os pace imi etae input baac ce ab vaa a pack oM Pac q eR 6 28 DLS Priority Outbound Filters Window with Configured Fllters 6 29 DLSw Peer Configuration WINGOW suerte rtis ones OOO Sample DLSw LLC2 Network Connection Sequence RFC 1434 C 9 Sample DLSw SDLC Network Connection Sequence C 12 XV Tables Table 4 1 DLSw Startup Screens and Required Parameters 4 2 Table 4 2 IDBLOCK Numbers for Switched PUS esesussusssssss 4 25 Table 5 1 Customizing the DLSw Support Protocols 1 repetita sinn 5 2 Table 5 2 IDBLOCK Numbers for Switched PUS esses 5 63 Table 6 1 Accessing the DLSw Protocol Prioritization Windows 6 30 Table A 1 DLSw Basic Global Parameters cccac ccissasassieserensscsetsenedssvuesensseseeereassvenss A 1 Table A 2 DLSw Basic Interface Parameters essssssssssseeereenenenes A 1 Table A 3 DLSw Advanced Global Parameters essen A 2 Table A 4 DLSw Advanced Interface Parameters esses A 3 Table A 5 DLSw Peer IP Table
222. t frames triggered by client demand for connection services Responses to these broadcasts enable the local router to e Identify DLSw peers that can reach the requested remote NetBIOS or SNA system Manage open restart and close TCP connections to the DLSw peer that can reach the requested SNA or NetBIOS system 303523 A Rev 00 DLSw Configuration Overview Once a router knows that a DLSw peer can reach a specific system the router can address frames directly to that peer and avoid unnecessary broadcast traffic on the TCP IP network You typically define as configured peers e One slot in each DLSw capable remote Bay Networks router in your TCP IP network to which broadcast traffic must be forwarded e Any other peer in your TCP IP network that complies with RFC 1434 RFC 1795 or DLSw Version 2 You define each configured peer by specifying its unique IP address on the TCP IP network With RFCs 1434 and 1795 once you initialize DLSw services the local router establishes two TCP connections one for transmitting one for receiving between each local DLSw capable slot and every configured peer in the TCP IP network Remote DLSw peers on the network follow the same procedure DLSw uses TCP ports 2065 and 2067 Peer Types For V2 0 you can define a specific transport type to a DLSw peer specifically e TCP e UDP e Unknown Peers that you define as TCP or UDP will cause the local router to use TCP or UDP explore
223. t messages in the log file These messages provide critical information that can help you troubleshoot or report network connection problems Figure C 1 identifies each transaction with a message number Use this number to point to the specific debug message that describes the network activity C 8 303523 A Rev 00 Troubleshooting DLSw Ethernet CL Token Ring TCP IP Host Router A Ed Router B A os Terminal LLC PU 2 0 Router B log file message number Test P 4 CANUREACH ICANREACH gt REACHACK 4 NULL XID P a amp XIDFRAME NULL NULL XID P 10 NULL XID F XIDFRAME NULL NULL XID F a amp NULL T2 P XIDFRAME T2 12 SABME gt UA RNR CONTACT gt UA 4 amp CONTACTED DLS0032A Figure C 1 Sample DLSw LLC2 Network Connection Sequence RFC 1434 303523 A Rev 00 C 9 Configuring DLSw Services Reviewing the Network Log This section describes the debug event messages that Router B logs when it establishes a connection with Router A refer to Figure C 1 Each message begins with a num
224. tation the router emulates a PU 2 0 device Click on Values and select Primary Secondary PP or Secondary MP 1 3 6 1 4 1 18 3 5 1 5 2 1 8 5 24 303523 A Rev 00 Editing DLSw Parameters Enabling a DLSw Interface Using the Edit Circuits Function You can also access the Enable parameter of a DLSw interface through the Edit Circuits function To do so begin at the Configuration Manager window refer to Figure 5 1 and do either of the following e Select Circuits gt Edit Circuits to open the Circuit List window Figure 5 6 then select a circuit and click on Edit e Select a connector in the Configuration Manager window to open the Edit Connector window Figure 5 7 then click on Edit Circuit c emus Configuration Mode local SNMP Agent LOCAL FILE Circuits E21 E22 E22 11c2 552 553 Delete Figure 5 6 Circuit List Window 303523 A Rev 00 5 25 Configuring DLSw Services Edit Circuit Edit Line Figure 5 7 Edit Connector Window In either case the Circuit Definition window appears Figur Configuration Moder local SHAP Agent LICA FILE Protocols Slot Figure 5 8 Circuit Definition Window 5 26 303523 A Rev 00 Editing DLSw Parameters Follow these steps to enable or disable a DLSw interface 1 Select Protocols gt DLSw gt Interfaces The Edit DLSw Interface window appears Figure 5 9 aa Enable DLSw Mode Figure 5 9
225. tem on an Ethernet 802 3 circuit the translating bridge looks like a transparent bridge 303523 A Rev 00 2 7 Configuring DLSw Services Bay Networks router Translating bridge service i Source routing i i bridge i i e 7 Token Ring segment Ethernet 802 3 segment Figure 2 5 DLS0018A Translation Bridge Services The translation bridge service e Supports communication between systems on SRB and Ethernet 802 3 segments locally attached to the same router Maps between SRB and Ethernet 802 3 framing requirements Using DLSw Independently of the Translation Bridge You can use DLSw independently of the translation bridge to allow an Ethernet attached device to communicate with a device attached to an SRB network such as Token Ring DLSw provides local termination while the translation bridge provides the end to end connection The translation bridge supports the bridge media while DLSw supports the Ethernet networks In Figure 2 6 Router A uses DLSw to convert traffic between the locally attached Ethernet and Token Ring interfaces Additionally the Token Ring and Ethernet attached devices can communicate with Ethernet devices attached to Router C using DLSw 2 8 303523 A Rev 00 DLSw Implementation Notes Ethernet 1 Ethernet 2 DLSw converts Ethernet 1 traffic to Token Ring Router B Router C Token Ring attached
226. terminates Enter the appropriate IP address If a circuitless IP address is configured use that address for this parameter 1 3 6 1 4 1 18 3 5 1 5 3 1 3 5 8 303523 A Rev 00 Editing DLSw Parameters Editing the DLSw Advanced Global Parameters To edit DLSw advanced global parameters begin at the Configuration Manager window Figu and then select Protocols gt DLSw gt Advanced gt Global The Edit DLSw Global Parameters window appears Figu The advanced global parameters include the basic global parameters that you used when you first configured DLSw on the interface You can edit the basic global parameters if you need to make changes to you DLSw network a Cancel l OK Values Help Enable ENABLE E TCP Window Size 8000 DLSw IP Virtual Ring hex 0x1 Max Slot Sessions Virtual Ring MTU Mac Cache Age secs NetBios Cache Age secs Reject Unconfigured Peers ACCEPT DLSw RFC Version Maximum Package Size Figure 5 4 Edit DLSw Global Parameters Window Descriptions of the DLSw advanced global parameters follow 303523 A Rev 00 5 9 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Enable Enable Enable Disable Globally enables or disables the system software mechanisms that allow you to add DLSw interfaces to the node configuration e Disable Switches every DLSw interface enabled on the route
227. that SRB uses to identify traffic that is placed on the SRB LAN by DLSw This ring number is the first entry in the packet s routing information field RIF The ring number must be unique within the network However all Bay Networks routers on the network can use the same value The number must be e Unique among any other ring IDs group LAN IDs or internal LAN IDs assigned in the network e The same as the virtual ring number used by all other DLSw peers on the same TCP IP network Entering a hexadecimal value for this mandatory parameter prepares the router for DLSw services on Token Ring 802 5 circuits Enter a value even if you are presently configuring DLSw services on Ethernet 802 3 circuits only Bay Networks recommends the value OxFFD if this value is available 1 3 6 1 4 1 18 3 5 1 5 1 5 303523 A Rev 00 5 5 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID DLSw Reject Unconfigured Peers Accept Accept Reject Specifies whether DLSw peers in this router should allow Accept or disallow Reject TCP sessions with other DLSw peers not defined in the DLSw Peer Table Select Accept if you want to allow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Select Reject
228. that meets this filter s criteria and ranges to the queue number you specify 9 Click on OK The Filter Template Management window reappears refer to Figure 6 14 10 Click on Done to return to the DLS Priority Outbound Filters window refer to Figure 6 13 11 To apply the template click on Create The Create Filter window appears Figure 6 18 303523 A Rev 00 6 27 Configuring DLSw Services Figure 6 18 Create Filter Window 12 13 14 15 16 Type a name for the filter in the Filter Name box Highlight All DLSw Peers to apply this template to all configured peers or select an individual peer from the Interfaces scroll box Select the template that you want to apply from the Templates scroll box Click on OK The DLS Priority Outbound Filters window reappears with the new filter displayed in the scroll box Figure 6 19 Repeat Steps 11 to 15 to apply other templates Each entry in the filter scroll box lists the filter number filter name and IP address of the affected DLSw peer Filters that apply to all DLSw peers appear with IP address 0 0 0 0 Site Manager numbers the filters for each peer interface chronologically 6 28 303523 A Rev 00 Using DLSw Prioritization E DLS Priority Outbound Filters Done DLS 1 SN Qi all DLS 2 netbios Q2 all Apply DLS 1 FID_type_Log Template Create Edit Reorder Delete Values Help Filter Enable ENABLED Filt
229. the IP address at which the configured peer will receive all DLSw related broadcast frames MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 5 1 3 Editing DLSw Basic Interface Parameters To edit DLSw basic interface parameters begin at the Configuration Manager window refer to Figure 5 1 and then 1 Select Protocols DLSw Basic Interface The DLSw Basic Interface Parameters window appears Figure 5 3 ESESESEEEMEELLELIXLLLHUNB OXZS ZDEGOiLES GLECLLELLLLLLELLCKLLCER AU LLCIERREOBOLZSR Cancel OK Values Help DLSw Slot IP Address Figure 5 3 DLSw Basic Interface Parameters 303523 A Rev 00 5 7 Configuring DLSw Services If you are configuring a DLSw slot for a Token Ring or Frame Relay BAN network edit the SR Interface Ring ID parameter See Configuring Bridging Services for detailed information on the SR Interface Ring ID parameter To edit an IP address on a DLSw slot 1 2 Enter the appropriate slot value and its IP address Click on OK Note The SR Interface Ring ID only appears if you are configuring Token Ring or Frame Relay BAN Parameter Default Options Function Instructions MIB Object ID DLSw Slot IP Address 0 0 0 0 Any IP address specified in dotted decimal notation Specifies a unique IP address for each slot running DLSw on the router The address cannot be reused on another slot The IP address specifies where the TCP connection for DLSw
230. the circuit To configure the DLSw APPN boundary function you must now add an APPN interface to the same virtual circuit as described in Adding an APPN Interface to an Existing Virtual Circuit later in this chapter Obtaining the Virtual Circuit Number Site Manager assigns a circuit number to each virtual circuit you create When you add an APPN interface to the virtual circuit you are using to support the boundary function you must specify the circuit number assigned to the VCCT To obtain this information Click on Protocols The Protocols menu opens Click on Global Protocols 4 34 303523 A Rev 00 Starting DLSw The Global Protocols window opens Click on VCCT The VCCT menu opens Click on Interfaces The VCCT Circuits window opens listing all the virtual circuits on the router Each entry specifies the slot and circuit number of the virtual circuit Make a note of the circuit number of the VCCT you created and click on Done You return to the Configuration Manager window Adding an APPN Interface to an Existing Virtual Circuit Begin at the Configuration Manager window 1 Click on Protocols The Protocols menu opens Click on APPN The APPN window opens Click on Boundary Function The Boundary Function window opens Click on Add VCCT Site Manager asks Do you want to create a new Virtual Circuit or use an existing one Click on Cancel to use an existing virtual circuit
231. the list 3 Click on Done The Configuration Manager window reappears Editing DLSw Local Devices Parameters DLSw Local Devices parameters let you map SDLC devices to LAN MAC and SAP addresses This section assumes that you have already added local devices Chapter 3 describes the different ways that you can add local devices Read this section if you want to edit the local device configurations To access DLSw Local Devices parameters begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols DLSw Local Devices The DLS Local Device Configuration window appears Figure 5 28 5 58 303523 A Rev 00 Editing DLSw Parameters DLS Local Device Configuration testnet 0x04 S53 Done Delete Apply Link Details Values Help i EEEENNNNNMNMNMNMNMNMNMNMAEZMAAMAZZ Disable ENABLE DLSw Mode PRIMARY PU Name testnet PU Type IDBLOCK 3 hex digits 000 IDNUM 5 hex digits 00000 Figure 5 28 DLS Local Device Configuration Window 2 Click on the local device whose parameters you want to change 3 Edit the appropriate parameters For information see the next section DLSw Local Devices Parameter Descriptions 4 Click on Apply to save your changes 5 Proceed as follows e To edit the parameters of another local device select that device and repeat Steps 2 and 3 e Select Link Details to display the SDLC Link Station Configuration window Refer to
232. the local device will reach via SDLC services Consult your host system manager for the host SAP address Type Ox followed by a 1 digit or 2 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 9 5 66 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID MAXOUT 7 1 to 127 Controls the maximum number of consecutive frames that an SDLC link station can send without acknowledgment Type a value from 1 to 127 1 3 6 1 4 1 18 3 5 1 7 5 1 10 MAXDATA 2057 265 521 1033 2057 Specifies the maximum frame size that SDLC supports This value includes the transmission header TH and request header RH Enter a maximum frame size that is equal to or larger than the largest frame size that will be received 1 3 6 1 4 1 18 3 5 1 7 5 1 7 Canureach Timer sec 30 0 to 3600 Specifies the time interval in seconds after which the router sends a CANUREACH message to the remote DLSw peer to establish a session Enter the number of seconds you want for the time interval For example type 1 to transmit a CANUREACH message once per second or type 3600 to transmit the message once per hour Type 0 if you do not want to transmit a CANUREACH message 1 3 6 1 4 1 18 3 5 1 5 12 1 11 303523 A Rev
233. tion SDLC does not connect to the host computer SDLC interface not active SDLC local devices not configured properly Source or destination MAC address incorrect if LLC media is Ethernet the address needs to be in non canonical format XID is incorrect SDLC device configured for NRZI Check the configuration to ensure that there is an SDLC connection Check the DLSw local device configuration Verify that the MAC address is correct if the LLC media is Ethernet then flip the address format Obtain correct XID values Check the SDLC device and set the Sync Line Coding parameter The SDLC connection is up and down Idle timeout too short for some configurations SDLC device configured for half full duplex Increase the SDLC Idle Line Timer parameter wfSdlcPortAdminldleTimer For a half duplex physical line set the RTS Enable parameter to Enable or set wfSyncRtsEnable to 1 for a full duplex data link set the Primary Full Duplex parameter to Falsefull duplex or set wfSdlcPortAdminPriFdplx to 2 C 28 303523 A Rev 00 Troubleshooting DLSw Verifying the WAN Cabling Tables C 12 to C 15 list the specific WAN cables that ensure reliable DLSw connectivity over an SLDC connection The table includes e The Bay Networks cable part number Pin description and connector type e Supported routers e Modem or no modem configuration Table C 13 BLN and
234. tization Source Routing Bridge Functional MAC Addresses Functional MAC addresses are destination MAC addresses that always conform to the following rules e Byte0 0xCO e Byte 1 0x00 e The first half of byte 2 0x0 to 0x7 Table B 5 lists some common functional MAC addresses Table B 5 Functional MAC Addresses Function Name MAC Address MSB Identifying Bit Ethernet Address Active Monitor 0xC000 0000 0001 Byte 5 bit 7 0x030000000080 Ring Parameter 0xC000 0000 0002 Byte 5 bit 6 0x030000000040 Server Ring Error 0xC000 0000 0008 Byte 5 bit 4 0x030000000010 Monitor Configuration 0xC000 0000 0010 Byte 5 bit 3 0x030000000008 Report Server NetBIOS 0xC000 0000 0080 Byte 5 bit 0 0x030000000001 Bridge 0xC000 0000 0100 Byte 4 bit 7 0x030000008000 LAN Manager 0xC000 0000 2000 Byte 4 bit 2 0x030000000400 User Defined 0xC000 0008 0000 to Byte 3 bits 0 4 0x030000100000 to 0xC000 4000 0000 Byte 2 bits 1 7 0x030002000000 Specifying Source and Destination SAP Code Ranges Table B 6 lists several SAP codes to use when specifying a range for source or destination SAP traffic filter criteria 303523 A Rev 00 B 5 Configuring DLSw Services Table B 6 SAP Codes Description SAP Code XID or TEST 00 Individual Sublayer Mgmt 02 Group Sublayer Mgmt 03 SNA 04 08 0C IP 06 Proway Network Mgmt O
235. to Licensee that the media on which the Software is provided will be free from defects in materials and workmanship under normal use for a period of 90 days from the date Software is first shipped to Licensee Bay Networks will replace defective media at no charge if it is returned to Bay Networks during the warranty period along with proof of the date of shipment This warranty does not apply if the media has been damaged as a result of accident misuse or abuse The Licensee assumes all responsibility for selection of the Software to achieve Licensee s intended results and for the installation use and results obtained from the Software Bay Networks does not warrant a that the functions contained in the software will meet the Licensee s requirements b that the Software will operate in the hardware or software combinations that the Licensee may select c that the operation of the Software will be uninterrupted or error free or d that all defects in the operation of the Software will be corrected Bay Networks is not obligated to remedy any Software defect that cannot be reproduced with the latest Software release These warranties do not apply to the Software if it has been i altered except by Bay Networks or in accordance with its instructions ii used in conjunction with another vendor s product resulting in the defect or iii damaged by improper environment abuse misuse accident or negligence THE FOREGOING WARRANTIES AND LIMITATIONS ARE
236. trictions set forth in subparagraph c 1 of the Commercial Computer Software Restricted Rights clause of FAR 52 227 19 and the limitations set out in this license for civilian agencies and subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause of DFARS 252 227 7013 for agencies of the Department of Defense or their successors whichever is applicable 6 Use of Software in the European Community This provision applies to all Software acquired for use within the European Community If Licensee uses the Software within a country in the European Community the Software Directive enacted by the Council of European Communities Directive dated 14 May 1991 will apply to the examination of the Software to facilitate interoperability Licensee agrees to notify Bay Networks of any such intended examination of the Software and may procure support and assistance from Bay Networks 7 Term and termination This license is effective until terminated however all of the restrictions with respect to Bay Networks copyright in the Software and user manuals will cease being effective at the date of expiration of the Bay Networks copyright those restrictions relating to use and disclosure of Bay Networks confidential information shall continue in effect Licensee may terminate this license at any time The license will automatically terminate if Licensee fails to comply with any of the terms and conditions of the license Upon termi
237. tructions MIB Object ID DLSw RFC Version RFC1434 RFC1434 RFC1795 V2 0 Unicast RFC2166 Multicast Selects the RFC implementation to run on the router RFC 1434 RFC 1795 DLSw Version 2 0 Unicast or RFC 2166 Multicast Click on Values and select RFC 1434 RFC 1795 V2 0 or RFC 2166 Refer to Chapter 1 for detailed information on these RFCs 1 3 6 1 4 1 18 3 5 1 5 1 28 DLSw Peer IP Address add only 0 0 0 0 Any valid 32 bit IP address of the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer Once added to the DLSw peer table this address defines a configured peer on the local router Configured peers receive all DLSw related broadcast frames for a given router or network processor Enter the IP address at which the configured peer will receive all DLSw related broadcast frames This parameter is optional in single switch DLSw configurations 1 3 6 1 4 1 18 3 5 1 5 5 1 3 Setting the SRB Basic Global Parameters This section describes the DLSw basic global parameters if you are configuring DLSw over Token Ring or other SRB network Frame Relay BAN Bridged SNA RFC 1490 or LLC over SRB 4 8 303523 A Rev 00 Starting DLSw Adding Source Routing Parameters for Token Ring When you add DLSw to a Token Ring circuit you first set the source routing global parameters If you have not yet enabled source routing on any circuit the first w
238. tself and the DLSw disconnect sequence finishes normally The following sample log entries show this condition 36 04 25 95 22 43 17 DEBUG SLOT 1 DLS Event Code 16 State change in llc disc ind conn 30927f70 old state 1 new state 11 38 04 25 95 22 43 17 DEBUG SLOT 1 DLS Event Code 36 Unexpected protocol action state 11 event 10 conn 30927f70 39 04 25 95 22 43 17 DEBUG SLOT 1 DLS Event Code 0 The previous event on slot 1 repeated 7 time s Code 36 40 04 25 95 22 43 17 DEBUG SLOT 1 DLS Event Code 45 SSP dl halted frame rcvd in LLC conn state flag 30927f70 b 0 C 20 303523 A Rev 00 Troubleshooting DLSw TCP open error 29 The DLSw peer connections through TCP cannot be activated until the source local IP interface becomes active For example Token Ring networks that take longer to initialize may cause this error in the log The TCP sessions establish when the IP interface activates For example 36 04 25 95 22 43 17 INFO SLOT 1 TCP Event Code 7 TCP Error 29 Opening 192 200 1 25 2065 192 200 4 40 2067 TCB 0x3042cf0 DLSw peers not reachable due to lack of a route IP needs to route the TCP connect request to the remote peer through the standard routing mechanisms If IP cannot reach the destination address the TCP peer connection cannot establish Traffic going over SRB instead of DLSw path Performance is below normal and data traverses the network over SRB
239. ual switch DLSw Peer IP Address SR Interface Ring ID For dual switch DLSw Slot IP Address Default DLUS Name Default Backup DLUS Name Max Send BTU Size Max Receive BTU Size Slot Number 303523 A Rev 00 Starting DLSw Setting the DLSw Basic Global Parameters This section describes the DLSw basic global parameters if you are configuring DLSw over Ethernet e SDLC e Frame Relay BNN Routed SNA RFC 1490 or LLC over Frame Relay e QLLC e Boundary Function After you select DLSw from the Select Protocols window the DLSw Basic Global Parameters window appears Figure 4 1 To set the DLSw global parameters follow these steps 1 Edit the DLSw Virtual Ring ID and the DLSw RFC Version parameters 2 For dual switch networks specify the DLSw Peer IP Address 3 Click on OK Optionally you can edit the remaining parameters on the DLSw Basic Global Parameters window These parameters are also available from the Protocols gt DLSw gt Basic Global menu path 303523 A Rev 00 4 5 Configuring DLSw Services fo DLSw Basic Global Parameters Cancel OK Values Help Reject Unconfigured Peers ACCEPT RFC Version RFC1434 NetBIOS Support NO Peer IP Address add only Figure 4 1 DLSw Basic Global Parameters Window Following are descriptions of the basic global parameters 4 6 303523 A Rev 00 Starting DLSw Parameter DLSw Virtual Ring ID Default None
240. uit with DLSw services enabled Figure 2 3 the following rules apply e Upon receiving an explorer frame that contains a DLSw specific destination SAP address DLSw and SRB attempt concurrently to locate the requested program entity JDLSw searches the network for a route to the target system by forwarding the packet to all local DLSw interfaces and all known remote DLSw routers SRB looks for a bridged path to the target system using standard source route bridge broadcasts e DLSw or SRB whichever receives a response first takes precedence The slower subsystem ceases any further attempts to support a connection to the target program 303523 A Rev 00 2 5 Configuring DLSw Services SRB packet gt Router Forward to DLSw Forward to SRB DLS0028A Figure 2 3 DLSw and Source Route Bridging on SRB Circuits DLSw and Bridging Services This section presents the different types of bridging services that coexist on a circuit with DLSw and explains any differences in TEST or explorer frame handling on these circuits This information is useful when you examine traffic on LANs locally attached to the router DLSw on an Ethernet 802 3 Circuit The router supports DLSw configured on an Ethernet 802 3 circuit The DLSw software provides bridging services between Ethernet 802 3 LAN segments locally attached to the same router The DLSw interface takes precedence over the transparent bridge interface whe
241. ult Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Slot Depends on the number of slots in the router For a BLN the default is 00000 Depends on the number of slots in the router Specifies the slots that you want to receive and transmit multicast data Click on the Values button Select the slots that you want to receive and transmit multicast data For example if you select Slots 2 and 3 ina BLN then the value in the Slot field appears as 01100 1 3 6 1 4 1 18 3 5 1 5 15 1 4 Multicast IP Slots The value or values you selected for the Slot parameter Depends on the number of slots in the router Specifies the slots that you want to receive and transmit multicast data Accept the value you entered at the Slot parameter on the second DLSw Multicast Configuration window or click on the Values button and select different slots 1 3 6 1 4 1 18 3 5 1 5 15 1 4 Backup Config No Yes No Enables the parameters that allow you to configure a backup peer Accept the default No or click on the Values button and select Yes 1 3 6 1 4 1 18 3 5 1 5 15 1 5 303523 A Rev 00 5 73 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object
242. unavailable or cannot be reached over a TCP connection Enter the IP address of the backup peer 1 3 6 1 4 1 18 3 5 1 5 5 1 12 Backup Peer Type V20 Unicast Unknown RFC1795 V20 Unicast TCP V20 Unicast Unknown V20 Unicast UDP RFC2166 Multicast Specifies the type of DLSw backup peer Accept the default V20 Unicast Unknown or select a different option 1 2 6 1 4 1 18 3 5 1 5 5 1 18 5 30 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Backup Max Up Time 0 0 to 999999 Specifies the maximum time in seconds that the backup peer can remain connected to the local DLSw peer When the maximum time is reached the software terminates the TCP connection if there are no active TCP sessions between the routers The software overrides the Backup Max Up Time parameter setting only if there is an active non idle TCP connection with data transferring between the routers Type a value in the range 0 to 999999 Specify 0 to disable the Backup Max Up Time parameter 1 3 6 1 4 1 18 3 5 1 5 5 1 13 Backup Hold Down Time sec 120 0 to 2147483647 Specifies the time to wait in seconds after the primary peer is declared unreachable before the local router initiates a TCP connection to the backup peer The hold down time ensures that the primary peer ha
243. ure 5 15 Delete Apply Values Help j IP Address for TCP Connection 198 42 62 4 Ie Figure 5 15 Deleting a DLSw Slot Table Entry 5 40 303523 A Rev 00 Editing DLSw Parameters 1 Select the Slot IP Table entry 2 Click on Delete The system software deletes the entry you selected and the entry disappears from the list 3 Click on Done You return to the Configuration Manager window Editing DLSw SAP Table Parameters The DLSw SAP Table contains a list of the SAP addresses associated with communication subsystems on PCs hosts FEPs cluster controllers and other systems in your network This section describes how to add edit and delete DLSw SAPs Each SAP Table entry establishes a DLSw SAP address and a SAP window flow control parameter value for that SAP See Chapter 3 for more information about DLSw SAPs DLSw SAP Table entries appear in the DLSw SAP Configuration window When you add DLSw to a router configuration there are four predefined SAP entries 00 04 08 and OC Figure 5 16 If you specified Yes to the DLSw NetBIOS Support parameter then the SAP FO also appears in the list To access the DLSw SAP Configuration window begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSw gt SAP Table The DLSw SAP Configuration window appears Figure 5 16 listing all SAP addresses that are accessible through DLSw services on the router
244. ute or create derivative works from the Software or user manuals or any copy in whole or in part Except as expressly provided in this Agreement Licensee may not copy or transfer the Software or user manuals in whole or in part The Software and user manuals embody Bay Networks and its licensors confidential and proprietary intellectual property Licensee shall not sublicense assign or otherwise disclose to any third party the Software or any information about the operation design performance or implementation of the Software and user manuals that is confidential to Bay Networks and its licensors however Licensee may grant permission to its consultants subcontractors and agents to use the Software at Licensee s facility provided they have agreed to use the Software only in accordance with the terms of this license 3 Limited warranty Bay Networks warrants each item of Software as delivered by Bay Networks and properly installed and operated on Bay Networks hardware or other equipment it is originally licensed for to function substantially as described in its accompanying user manual during its warranty period which begins on the date Software is first shipped to Licensee If any item of Software fails to so function during its warranty period as the sole remedy Bay Networks will at its discretion provide a suitable fix patch or workaround for the problem that may be included in a future Software release Bay Networks further warrants
245. uters establish across the network when a router locates a destination MAC address When established a TCP IP session remains active between the routers until there are no remaining SNA NetBIOS sessions or if a TCP connection is idle over a configured time period If the local router cannot find the destination MAC address no UDP response the local router establishes TCP sessions with all entries in the Peer Table using either RFC 1795 or RFC 1434 protocol standards if the destination MAC is an unknown peer type You can configure DLSw to use UDP explorer frames to establish TCP IP sessions with DLSw peers by setting the Transport Type parameter TCP UDP and Unknown Peer Types With DLSw Version 2 unicast you can configure DLSw peers as TCP UDP or Unknown If the peer type is unknown the local router sends UDP explorer frames to establish a connection If the local router does not receive a UDP response after a number of attempts the local router will try to fall back to earlier DLSw RFCs to establish the connection If the peer type is TCP then a TCP connection establishes when you start the local router If the peer is UDP a TCP connection establishes after the UDP explorer frames are correctly exchanged Refer to Chapter 5 for information on the Transport Type and SNA Fallback Attempts parameters 303523 A Rev 00 1 5 Configuring DLSw Services Single TCP IP Connection DLSw Version 2 uses a single full duplex TC
246. ven if you are presently configuring DLSw services on Ethernet 802 3 circuits only Bay Networks recommends the value OxFFD if this value is available MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 5 Note The DLSw IP Virtual Ring and Virtual Ring MTU parameters that appear in the Edit DLSw Global Parameters window are primarily for compatibility with SRB networks locally attached to the router However Site Manager requires you to enter a value for the IP Virtual Ring even if you are configuring DLSw services on non SRB segments locally attached to the same router 5 12 303523 A Rev 00 Editing DLSw Parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Max Slot Sessions 200 1 to 10000 Specifies the maximum number of LLC2 sessions that a given slot in the router can support for DLSw requirements Specifying more sessions per slot has the effect of dedicating more memory and processing resources to DLSw interfaces running on the router If possible estimate the maximum number of LLC2 sessions that each DLSw peer slot may need to support concurrently Type a number that Meets session support requirements for DLSw services provided on any slot of the router e Allows a balance between the number of sessions supported for DLSw services on a slot and the amount of resources remaining for other protocols confi
247. window reappears Following is a description of the Default MAC Peer IP Address parameter 5 56 303523 A Rev 00 Editing DLSw Parameters Parameter Default Options Function Instructions MIB Object ID Default MAC Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer that can reach the SNA system or application identified by the MAC address and currently selected in the DLSw MAC Peer Configuration window The router adds this IP address to the list of configured peers in the DLSw Peer IP Table Type the IP address of the remote DLSw peer that can reach the remote SNA system or application identified by the MAC address and currently selected in the DLSw MAC Peer Configuration window 1 3 6 1 4 1 18 3 5 1 5 10 1 3 Deleting a DLSw Default MAC Peer IP Table Entry To delete a DLSw Default MAC Peer IP Table entry from the router configuration start at the DLSw MAC Peer Configuration window Figure 5 27 1 Select the entry to delete 2 Click on Delete Ox2a33bffidc2e Done Add Delete Apply Values Help LH MK Default Mac Peer IP Address Figure 5 27 198 42 61 6 Deleting a DLSw Default MAC Peer IP Table Entry 303523 A Rev 00 5 57 Configuring DLSw Services The system software deletes the entry you select and removes the entry from
248. with an existing DLSw Peer IP Table entry To change the IP address of an entry 1 2 Delete the existing entry from the DLSw Peer IP Table Using the appropriate IP address add a new configured peer entry to the DLSw Peer IP Table See the preceding section Adding a DLSw Peer IP Table Entry 303523 A Rev 00 5 35 Configuring DLSw Services To delete a DLSw Peer IP Table entry start at the DLSw Peer Configuration window refer to Figure 5 10 1 Select the entry to delete 2 Click on Delete The system software deletes the entry and the removes entry from the list of configured peers 3 Click on Done The Configuration Manager window reappears Editing the DLSw Slot IP Table The DLSw Slot Configuration Table contains a list of all DLSw capable slots in your router Each table entry establishes a slot in the router as a DLSw peer on your TCP IP network You identify a slot by its number in the router chassis and a DLSw peer by its IP interface address on the TCP IP network DLSw Slot IP Table entries associate the number of a DLSw capable slot with the IP network address of that peer slot This section describes how to add edit and delete DLSw Slot IP Table entries Note Before you add any entries to the slot table you must add or allocate one IP interface for each DLSw capable slot in the router configuration You need not configure the associated IP and DLSw interfaces on the same slot

Avaya Configuring DLSw Services User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents