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1. BYTES IN OUT number number Total number of bytes sent to received from the host TN3270 Server Commands 49 show extended channel tn3270 server pu lu Table 10 Show tn3270 server pu lu Field Descriptions Continued Field Description RUSIZE IN OUT RU size as configured in the bind number number NEGRSP IN OUT Number of SNA negative responses sent to received from the host number number PACING WINDOW IN OUT SNA pacing window as configured in the bind number number CREDITS IN number Number of frames that can be sent inbound without requiring an isolated pacing response QUEUE SIZE IN number If non zero indicates the number of SNA frames waiting to be sent to the host that are blocked while waiting for a pacing response QUEUE SIZE OUT number SNA frames not yet acknowledged by an isolated pacing response by the TN3270 server 50 1TN3270 Server Commands shutdown shutdown Use the shutdown interface configuration command to shutdown a physical interface or the internal LAN interface on the CIP when you are in interface configuration mode The shutdown command also shuts down TN3270 entities such as PU DLUR and DLUR SAP depending on which configuration mode you are in when the command is issued Use the no form of this command to restart the interface or entity The entity affected depends on the mode in which the command is issued shutdown no shutdown Syntax Description This com
2. Description Name of the PU as configured IP TCP ip addr tcpport IP address and TCP port number configured for the PU XID number Configured XID idblk and idnum STATE pu state Possible state values and their meanings are e shut tThe PU is configured but is in a shut state e reset tThe link station of this PU is not active e test PU is sending a TEST to establish link e xid TEST is responded XID is sent e p actpu The link station is up but no ACTPU is received e active ACTPU is received and acknowledged positively e act busy Awaiting host to acknowledge the SSCP PU data e wait Waiting for PU status from CIP e unknown Direct PU is in an undefined state e p rqactpu r PU is pending a request ACTPU response e p active DLUR PU and direct PU states disagree e p dactpu PU is pending DACTPU e dlur DLUR PU is in undefined state LINK type LINK type is either internal adapter type and internal adapter number or dlur if it is a SNA session switch PU DESTINATION mac address or PU name If a direct PU then it is the destination MAC address otherwise it is the name of the partner PU R LSAP number number Remote and local SAP values IDLE TIME number Configured idle time for this PU KEEPALIVE number Configured keepalive for this PU UNBIND ACT type Configured unbind action for LUs on this PU GENERIC POOL type Configu
3. Syntax Description f cpname Fully qualified control point CP name used by the SNA session switch and the logical unit LU name for the DLUR function This name must be unique among APPN nodes in the network including other fq cpname values specified on all other TN3270 servers running under the Cisco IOS software Jq dlusname Fully qualified name of the primary choice for the dependent LU server DLUS This is the name of an LU usually a CP in an APPN host The fg dlusname value can be repeated and shared across servers Default No DLUR function is enabled Command Mode TN3270 configuration Usage Guidelines If the SNA session switch function is already enabled the dlur command with no arguments puts you in DLUR configuration mode Several parameters in the DLUR configuration mode consist of fully qualified names as defined by the APPN architecture Fully qualified names consist of two case insensitive alphanumeric strings separated by a period However for compatibility with existing APPN products including VTAM the characters pound at and dollar are allowed in the fully qualified name strings Each string is from one to eight characters long for example RA12 NODM1PP The portion of the name before the period is the NETID and is shared between entities in the same logical network The no dlur command hierarchically deletes all resources defined beneath it Example The following
4. 0 out NegRsp 1 in 0 out pacing window 0 in 1 out credits 0 in queue size 0 in 0 out The following is sample output on the Cisco 7000 from the show extended channel tn3270 server pu lu command for a SNA session switch PU router show extended channel 3 2 tn3270 pu intl lu 1 lu name client ip tcp state model frames in out 1 GOAN1X01 171 69 176 77 3828 ACTIVE 4 4 pu is INT1 lu is STATIC type 0 negotiated TN3270E bytes 74 in 1219 out RuSize 0 in 0 out NegRsp 0 in 0 out pacing window 0 in 0 out credits 0 in queue size 0 in 0 out The following is sample output on the Cisco 7000 from the show extended channel tn3270 server pu lu history command router show extended channel 3 2 tn3270 pu pus20 lu 1 history lu name client ip tcp state model frames in out 1 PUS20001 192 195 80 40 2480 ACT SESS 327804 5 4 pu is PUS20 lu is DYNAMIC type 2 negotiated TN3270 bytes 155 in 1752 out RuSize 1024 in 3840 out NegRsp 0 in 0 out gt pacing window 0 in 1 out credits 0 in queue size 0 in 0 out traces 48 1TN3270 Server Commands show extended channel tn3270 server pu lu Client connect req Reply PSID pos rsp actlu req bind req sdt req OUT len 12 2Dxxxxxxxx456B80000D0201 IN len 25 XXXXXXXXXX45EB80000D0201000000 OUT len 53 2Dxxxxxxxx466B800031010303B1 IN len 10 2D0001010646EB800031 OUT len 10 2D00010106476B8000A0 IN len 10 2D0001010647EB8000A0 OUT len 1677 2Cxxxxxxxx010381C07EC7114040 IN len 9 2C000
5. number number CREDITS IN number Number of frames that can be sent inbound without requiring an isolated pacing response QUEUE SIZE IN number If non zero indicates the number of SNA frames waiting to be sent to the host which are blocked waiting for a pacing response QUEUE SIZE OUT number SNA frames not yet acknowledged by an isolated pacing response by the TN3270 server TN3270 Server Commands 41 show extended channel tn3270 server dlur show extended channel tn3270 server dlur Use the show extended channel tn3270 server dlur privileged EXEC command to display information about the SNA session switch show extended channel s ot 2 tn3270 server dlur Syntax Description slotl2 Specifies a particular CIP in the router where slot is the slot number The port value for a TN3270 server will always be 2 Command Mode Privileged EXEC Sample Display The following is sample output on the Cisco 7000 from the show extended channel tn3270 server dlur command router show extended channel 3 2 tn3270 server dlur dlur MPX GOANCP current dlus MPX NGMVMPC dlur dlus status ACTIVE preferred dlus MPX NGMVMPC backup dlus MPX NGMVMPB preferred server MPX NGMVMPA lsap token adapter 0 5C vrn MPX LAN4 status ACTIVE link P390 remote 4000 7470 00e7 08 status ACTIVE Table 7 describes significant fields in the display Table 7 Show tn3270 server dlur Field Descriptions Field Description DLUR fq luname Fully qualified CP name use
6. you achieve the same performance bypassing the DLC stacks as looping back on a single adapter Examples The following commands configure the TN3270 server to be active and has one PU CAPPU1 trying to connect in An LU seed using hexadecimal digits is defined tn3270 server pu CAPPU1 05D18101 10 14 20 34 token adapter 3 rmac 4000 0501 0001 lu seed CAPO1L The following example shows different adapter numbers configured on the same internal LAN to avoid SAP contention The host uses SAP 4 on token ring adapter 0 lan tokenring 0 adapter 0 4000 0000 0001 adapter 1 4000 0000 0002 tn3270 server pu PU1 05d00001 10 0 0 1 token adapter 1 8 rmac 4000 0000 0001 rsap 4 TN3270 Server Commands 33 pu direct Related Commands adapter lan 34 TN3270 Server Commands pu DLUR pu DLUR Use the pu DLUR configuration command to create a PU entity that has no direct link to a host or to enter PU configuration mode Use the no form of this command to remove the PU entity pu pu name pu pu name idblk idnum ip address no pu pu name Syntax Description pu name Name that uniquely identifies this PU idblk idnum This value must match the idblk idnum value defined at the host The value must be unique within the domain however the TN3270 server generally cannot tell which remote hosts are in which domains so the server only enforces uniqueness within the set of DLUR PUs ip address IP address that the clients sh
7. BT is based on Cisco IOS Release 11 0 Introduction This Release Note and Update is divided into the following sections Release Note page 2 Platform Support page 3 Cisco IOS Packaging page 3 Boot ROM Requirements page 3 CIP Boot Image Requirements page 3 Memory Requirements page 3 Microcode Software page 4 New Software Features in 11 0 10 BT page 4 Update to Configuration Guide page 4 Update to Command Reference page 19 Cisco Connection Online page 57 Cisco Connection Documentation page 57 Use this document in conjunction with the Router Products Release Notes for Cisco IOS Release 11 0 and the Cisco IOS Release 11 0 configuration guide and command reference publications specifically the Router Products Configuration Guide Chapters 1 to 6 Router Products Configuration Guide Chapters 22 to 33 Router Products Command Reference Chapters I to 6 Router Products Command Reference Chapters 22 to 33 Release Note Cisco IOS Release 11 0 BT introduces TN3270 server support on Channel Interface Processor CIP cards Note To enable the TN3270 server feature you must have a CIP card installed in a Cisco 7000 series router or Cisco 7500 series router The TN3270 server is different from the TN3270 terminal emulation access feature described in the Configuring TN3270 chapter of the Access and Communication Servers Configuration Guide 2 Cisco IOS Release 11 0 BT Release N
8. CIP card rather than routing in the VTAM hosts the TN3270 server implements a SNA session switch with end node dependent LU requester DLUR function Using the DLUR is optional so that the TN3270 server can be used with VTAM versions prior to version 4 2 which provide no APPN support SNA session switch allows you to eliminate SNA subarea routing between hosts of TN3270 traffic by establishing APPN links with the primary LU hosts directly Telnet Server Functions From the perspective of a TN3270 client the TN3270 server is a Telnet server that can support approximately 8000 CIP1 or 16000 CIP2 concurrent Telnet sessions The server on the CIP card supports Telnet connection negotiation and data format as specified in RFC 1576 referred to as traditional TN3270 and RFC 1647 referred to as TN3270E Figure 1 1TN3270 Implementation P ELN d a o CIR fi io eS TN3270 client lt gt lt gt SNA TCP IP Because the TN3270 server configuration is performed after an interface is configured for CIP SNA CSNA support TN3270 configuration issues and tasks are addressed separately from the interface configuration tasks The description of TN3270 configuration issues and tasks begins in the section Configuring TN3270 on a Channel Interface Processor later in this chapter Configuring TN3270 Server on the Channel Interface Processor 5 Configuring TN3270 on a Channel Interface Processor Note To
9. Name of the configured link If not a configured link then the name is an invented name DLURnn REMOTE mac sap Remote MAC and SAP for this link LINK STATUS status Possible link status values and their meanings are e inactive Not connected to host e pnd actv Link activation in progress e active Link active e pnd inac Link deactivation in progress TN3270 Server Commands 43 show extended channel tn3270 server dlurlink show extended channel tn3270 server dlurlink Use the show extended channel tn3270 server dlurlink privileged EXEC command to display information about the DLUR components show extended channel s ot 2 tn3270 server dlurlink name Syntax Description slotl2 Specifies a particular CIP in the router where slot is the slot number The port value for a TN3270 server will always be 2 name Name of the SNA session switch link to be displayed Command Mode Privileged EXEC Sample Display The following is sample output on the Cisco 7000 from the show extended channel tn3270 server dlurlink command router show extended channel 3 2 tn3270 server dlurlink P390 lsap token adapter 0 5C vrn MPX LAN4 status ACTIVE link P390 remote 4000 7470 00e7 08 status ACTIVE partner MPX NGMVMPC tgn 1 maxdata 1033 Table 8 describes significant fields in the display Table 8 Show tn3270 server dlurlink Field Descriptions Field Description LSAP VRN STATUS status Possible sap status
10. command performs two functions It enters DLUR configuration mode and it enables the DLUR function and defines the LU name for the DLUR as SYD TN3020 and the primary choice for DLUS as SYD VMG Note that the NETID portion of both names is the same dlur SYD TN3020 SYD VMG 20 1TN3270 Server Commands dlus backup dius backup Use the dlus backup DLUR configuration command to specify a backup DLUS for the DLUR function Use the no form of this command to remove a backup DLUS name dlus backup dlusname2 no dlus backup Syntax Description dlusname2 Fully qualified name of the backup DLUS for the DLUR Default No backup DLUS is specified Command Mode DLUR configuration Usage Guidelines Only one backup DLUS can be specified per CIP If the backup DLUS specified in the dlus backup command is in use when a no dlus backup is issued the connection is not torn down Several parameters in the DLUR configuration mode consist of fully qualified names as defined by the APPN architecture Fully qualified names consist of two case insensitive alphanumeric strings separated by a period However for compatibility with existing APPN products including VTAM the characters pound at and dollar are allowed in the fully qualified name strings Each string is from one to eight characters long for example RA12 NODM1PP The portion of the name before the period is the NETID and is shared between entities in th
11. enable the TN3270 server feature you must have a CIP installed in a Cisco 7000 family router The TN3270 server is different from the TN3270 terminal emulation access feature described in the Configuring TN3270 chapter of the Access Services Configuration Guide Configuring TN3270 on a Channel Interface Processor The following sections describe additional features of TN3270 server support on the CIP The features discussed include the following Dynamic LU Allocation Formation of LU Model Type and Number Specific LU Allocation SNA Session Switch End Node DLUR Multiple Hosts Support You will also need to understand the following information before proceeding with TN3270 configuration tasks VTAM Host Configuration Considerations for Dynamic LU Allocation TN3270 Configuration Modes Dynamic LU Allocation This will be the most common form of request from TN3270 clients emulating a TN3270 terminal The user typically wants to specify emulating a particular terminal type and normally is not interested in what LOCADDR or LU name is allocated by the host as long as a network solicitor logon menu is presented The server will perform the following on such a session request Form an EBCDIC string based on the model type and number requested by the client see Formation of LU Model Type and Number for the algorithm used This string is used as a field in a Reply product set ID PSID network management
12. is no SDT yet e act sess LU is bound and in session e p actlu Telnet connects in and is waiting for ACTLU e p ntf av Awaiting host notify available response e p ntf ua Awaiting host notify unavailable response e p reset Awaiting a buffer to send DACTLU response e p psid Awaiting NMVT Reply PSID response e p bind Waiting for host to send bind p unbind Awaiting host unbind response wt unbnd Waiting for client to acknowledge disconnection e wt sdt Waiting for client to acknowledge SDT MODEL model 3278 model type of client blank if STATIC LU FRAMES IN number Number of frames sent inbound to the host FRAMES OUT number Number of frames sent outbound from the host IDLE FOR time Time the client has been idle The time is in HH MM SS PU IS pu name Name of the PU LUIS type Whether LU is DYNAMIC or STATIC NEGOTIATED type 40 1TN3270 Server Commands Whether client is TN3270 or TN3270E show extended channel tn3270 server client ip address Table 6 Show tn3270 server client ip address Field Descriptions Continued Field Description BYTES IN OUT Total number of bytes sent to received from the host number number RUSIZE IN OUT RU size as configured in the bind number number NEGRSP IN OUT Number of SNA negative responses sent to received from the host number number PACING WINDOW IN OUT SNA pacing window as configured in the bind
13. match the name by which the TN3270 server knows the LU see the section LU Names in the TN3270 Server and the host must have activated the LU with ACTLU LU Names in the TN3270 Server Where SNA session switching is configured that is on DLUR PUs the TN3270 server learns the LU names from the ACTLUs For direct PUs a seed name can be configured on the PU The TN3270 server uses this name in conjunction with the LOCADDRS to generate names for the LUs It is best to use the same naming convention as the host if possible Configuring TN3270 Server on the Channel Interface Processor 7 VTAM Host Configuration Considerations for Dynamic LU Allocation SNA Session Switch End Node DLUR An end node DLUR function is implemented as part of the TN3270 server The purpose of the DLUR is to allow the routing of TN3270 LUs to multiple VTAM hosts to be performed in the CIP card rather than on the VTAM hosts The need for this feature will increase with the introduction of the new multi CPU CMOS mainframe which comprises up to 16 CPUs that appear as separate VTAMs The implementation of TN3270 server LUs under DLUR also allows the server to learn about the LU names on the ACTLU which greatly simplifies the configuration to support specifically requested LUs such as printers Multiple Hosts Support The TN3270 server supports access to multiple hosts via the configuration on a PU basis Table 4 PUs connected to different hosts
14. on the TN3270 Server This task is required when configuring PUs that do not use the SNA Session Switch feature To configure PU parameters for the TN3270 server perform the following tasks beginning in TN3270 configuration mode Task Enter PU configuration mode and create or delete PUs with direct host links Command pu pu name idblk idnum ip address type adapno lsap rmac rmac rsap rsap lu seed lu name stem Optional Assign a TCP port other than the default of 23 This command is also available in TN3270 configuration mode 14 Configuring TN3270 Server on the Channel Interface Processor tep port port nbr TN3270 Configuration Task List Task Command Optional Specify the idle time for server idle time num of seconds disconnect This command is also available in TN3270 configuration mode Optional Specify the maximum time allowed keepalive num of seconds between keepalive marks before the server disconnects This command is also available in TN3270 configuration mode Optional Specify whether the TN3270 session unbind action keep disconnect will disconnect when an UNBIND command is received This command is also available in TN3270 configuration mode Optional Select whether left over LUs can be generic pool permit deny used from a generic LU pool This command is also available in TN3270 configuration mode When you use the pu command you enter PU configuratio
15. the TN3270 information as a standalone chapter following page 33 22 4 Cisco IOS Release 11 0 BT Release Note and Update to Configuration Guides and Command References Cisco s Implementation of TN3270 on a Channel Interface Processor Configuring TN38270 Server on the Channel Interface Processor This chapter describes TN3270 server support provided by the Channel Interface Processor CIP card for Systems Network Architecture SNA devices For a complete description of the commands mentioned in this chapter refer to the TN3270 Server Commands update chapter Cisco s Implementation of TN3270 on a Channel Interface Processor The TN3270 server feature on a CIP card provides mapping between an SNA 3270 host and a TN3270 client connected to a TCP IP network as shown in Figure 1 Functionally it is useful to view the TN3270 server from two different perspectives SNA functions and Telnet Server functions SNA Functions From the perspective of an SNA 3270 host connected to the CIP the TN3270 server is an SNA device that supports multiple physical units PUs with each PU supporting up to 255 logical units LUs The LU can be Type 1 2 or 3 The SNA host is unaware of the existence of the TCP IP extension on the implementation of these LUs The LUs implemented by TN3270 server are dependent LUs To route these dependent LU sessions to multiple virtual telecommunications access method VTAM hosts connected to the server in the
16. values and their meanings are e inactive Not connected to adapter e pnd actv SAP activation in progress e active SAP open e pnd inac SAP deactivation in progress LINK name Name is an invented name DLURnz if not a configured link LINK STATUS status Possible link status values and their meanings are e inactive Not connected to host e pnd actv Link activation in progress e active Link active e pnd inac Link deactivation in progress PARTNER name CP name of the remote node for this link TGN tg number Transmission group number for this link Because the SNA session switch only supports 1 transmission group per pair of CP names it is typically 0 or 1 MAXDATA maxdata Maximum frame size allowed on this link 44 1TN3270 Server Commands show extended channel tn3270 server pu show extended channel tn3270 server pu Use the show extended channel tn3270 server pu privileged EXEC command to display the PU configuration parameters statistics and all the LUs currently attached to the PU show extended channel s ot 2 tn3270 server pu pu name Syntax Description extended channel Optional Specifies a particular CIP in the router where slot is the slotl2 slot number The port value for a TN3270 server will always be 2 pu name PU name that uniquely identifies this PU Command Mode Privileged EXEC Usage Guideline The display shown depends on whether the PU is a direct PU or a SNA sessi
17. vector transport NMVT Allocate a LOCADDR from the next available LU in the generic LU pool This LOCADDR is used in the NMVT Send the formatted Reply PSID NMVT to VTAM When VTAM receives the NMVT it will use the EBCDIC model type and number string to look up an LU template under the LUGROUP For example the string 327802E will find a match in the sample configuration shown in Figure 2 An ACTLU will be sent and a terminal session with the model and type requested by the client is established Formation of LU Model Type and Number VTAM requires a model type and number from the Reply PSID NMVT to use as a key to look up in the LU group to find an LU template The model type is a four character string the model number is atwo or three character string The server will accept the following formats of terminal type string from the client IBM lt XXXX gt lt Y gt J E This will be formatted as XXXXOY or XXXXOYE in the model type and number field in the Reply PSID NMVT 6 Configuring TN3270 Server on the Channel Interface Processor Configuring TN3270 on a Channel Interface Processor IBM DYNAMIC This will result in DYNAMIC being put in the model type and number field The VTAM configuration will need to have DYNAMIC defined as a template in the LU group In fact IBM ZZ Z where ZZ Z does not match the preceding syntax will be forwarded as YD Lilie Note The F in t
18. with any of the APPN hosts it can use session switching to reach that host directly When it starts a session with a non APPN host the traffic will be routed through the owning host Task List for Non APPN Hosts When the host site does not use APPN or you have a single APPN host you configure your PU parameters for a directly connected host In this instance perform the following tasks Configure SNA Support Configure TN3270 Server Configure PU Parameters on the TN3270 Server Monitor the TN3270 Server Configure SNA Support CIP SNA support CSNA must be configured prior to configuring TN3270 support Refer to the section Configure IBM Channel Attach for CSNA Support in the Configuring IBM Channel Attach chapter of Bridging and IBM Networking Configuration Guide After you have configured CSNA support proceed with TN3270 configuration Configuring TN3270 Server on the Channel Interface Processor 13 TN3270 Configuration Task List Configure TN3270 Server This task is required To establish a TN3270 server on the internal LAN interface on the CIP perform the following tasks beginning in global configuration mode Task Command Select the channel attach internal LAN interface and enter interface configuration mode interface channel s ot 2 Specify a TN3270 server on the internal LAN interface and enter TN3270 configuration mode tn3270 server Optional Configure maximum number of LUs
19. 1010001838100 Table 10 describes significant fields in the display Table 10 Show tn3270 server pu lu Field Descriptions Field Description LU locaddr LOCADDR of the LU NAME lu name Name of the TN3270 LU CLIENT IP TCP Client s IP address and TCP port number ip addr tcpport STATE lu state The LU state and their meanings are e unknown LU is in an undefined state e inactive LU did not receive ACTLU e active LU received ACTLU and acknowledged positively e p sdt LU is bound but there is no SDT yet e act sess LU is bound and in session e p actlu Telnet connects and is awaiting ACTLU e p ntf av Awaiting host notify available response e p ntf ua Awaiting host notify unavailable response e p reset Waiting for a buffer to send DACTLU response e p psid Waiting for NMVT Reply psid response e p bind Waiting for host to send bind e p unbind Awaiting host unbind response e wt unbnd Waiting for client to acknowledge disconnection e wt sdt Waiting for client to acknowledge SDT MODEL model 3278 model type of client blank if STATIC LU FRAMES IN number Number of frames sent to the host FRAMES OUT number Number of frames sent out from the host IDLE FOR time Time the client has been idle The time is in HH MM SS PU IS pu name Name of the PU LUIS type Whether LU is DYNAMIC or STATIC NEGOTIATED type Whether client is TN3270 or TN3270E
20. 33 30 TN3270 Server Commands This update describes the commands to configure TN3270 support on the Channel Interface Processor CIP For TN3270 configuration tasks and examples refer to the Configuring TN3270 Server on the Channel Interface Processor update chapter of this Release Note The following commands are documented in this update chapter dlur page 20 dlus backup page 21 generic pool page 22 idle time page 24 keepalive page 25 link page 26 Isap page 28 maximum lus page 30 preferred nnserver page 31 pu DLUR page 35 pu direct page 32 show extended channel tn3270 server page 36 show extended channel tn3270 server client ip address page 39 show extended channel tn3270 server dlur page 42 show extended channel tn3270 server dlurlink page 44 show extended channel tn3270 server pu page 45 show extended channel tn3270 server pu lu page 48 shutdown page 51 tcp port page 52 tn3270 server page 54 timing mark page 53 unbind action page 55 vrn page 56 TN3270 Server Commands 19 dlur dlur Use the dlur TN3270 configuration command to enable the Systems Network Architecture SNA session switch function on the CIP or to enter dependent logical unit requester DLUR configuration mode Use the no form of this command to disable the SNA session switch function and discard all parameter values associated with the SNA session switch dlur dlur fq cpname fq dlusname no dlur
21. Cisco SYSTEMS Doc No 78 3610 09 Cisco IOS Release 11 0 BT Release Note and Update to Configuration Guides and Command References January 15 1999 This document supplements the Cisco IOS Release 11 0 documentation set with new and changed commands that support Cisco IOS Release 11 0 10 BT and later Note that Cisco IOS Release 11 0 10 BT is the initial release of Cisco IOS Release 11 0 BT No prior versions of Cisco IOS Release 11 0 BT exist The TN3270 server function is supported on a Channel Interface Processor card in a Cisco 7000 series or Cisco 7500 series router The following Cisco IOS releases are covered by this release note publication Cisco IOS 11 0010 BT Cisco IOS 11 00 DBT Cisco IOS 11 0012 BT Cisco IOS 11 0 13a BT Note Cisco IOS Release 11 0 13 BT was renumbered and released as 11 0 13a BT Cisco IOS 11 0 14 BT Cisco IOS 11 0 14a BT1 Note Shipment of Cisco IOS Release 11 0 14 BT was halted due to CSCdj05366 A fix was implemented and the release was renumbered and released as 11 0 14a BT1 Corporate Headquarters Cisco Systems Inc 170 West Tasman Drive San Jose CA 95134 1706 USA Copyright 1998 Cisco Systems Inc All rights reserved Introduction Cisco IOS 11 00 5 BT Cisco IOS 11 0 16 BT Cisco IOS 11 007 BT Cisco IOS 11 0 18 BT Cisco IOS 11 0 19 BT Cisco IOS 11 0 20 BT Cisco IOS 11 021 BT Cisco IOS 11 0 222 BT Cisco IOS Release 11 0
22. Command Display the current server configuration parameters and the status of the PUs defined in each server show extended channel tn3270 server Display the PU configuration parameters statistics and all the LUs currently attached to the PU show extended channel tn3270 server pu name Display the status of the LU show extended channel tn3270 server pu name lu lu number history Display the information about LUs that are defined under an IP address show extended channel tn3270 server client ip address ip address Display information about the DLUR components 16 Configuring TN3270 Server on the Channel Interface Processor show extended channel tn3270 server dlur TN3270 Configuration Task List TN3270 Configuration Example The following configuration has three PUs using DLUR and two more with direct connections The initial CIP configuration is as follows interface Channel2 2 ip address 10 10 20 126 255 255 255 128 no ip redirects no ip directed broadcast ip pim query interval 0 ip igmp query interval 0 no ip route cache no keepalive no clns checksum clns congestion threshold 0 clns erpdu interval 0 clns rdpdu interval 0 no clns route cache no clns send erpdu no clns send rdpdu lan TokenRing 0 source bridge 223 1 2099 adapter 0 4100 cafe 0001 llc2 NI 2057 adapter 1 4100 cafe 0002 llc2 N1 2057 Configuration dialog to configure the TN3270 function follows HOSTA is channel atta
23. GMOD SNX32702 Stream Note that the USS messages in SSCPFM USS3270 USSXXX should be in 3270 datastream USSTAB USSYYY define template to support IBM 3278 LOGAPPL TPXPOO1 terminal model 2 with Extended Data DLOGMOD SNX32702 Stream for IN3270E clients requesting SSCPFM USSSCS BIND IMAGE USSTAB USSXXxX Ki define template to support IBM 3279 LOGAPPL TPXP001 terminal model 5 LU DLOGMOD D4C32785 SSCPFM USS3270 USSTAB USSXXxX this is the default template to match any LOGAPPL TPXPOO1 other terminal types DLOGMOD D4A32772 SSCPFM USS3270 With the configuration shown in Figure 2 defined in the host the ACTPU sent by VTAM for the PU TN3270PU will have the Unsolicited NMVT Support set in the system services control point SSCP capabilities control vector This allows the PU to dynamically allocate LUs by sending NMVT with a Reply Product Set ID control vector After the TN3270 server sends a positive response to the ACTPU it will wait for VTAM to send ACTLUs for all specifically defined LUs In the sample configuration shown in Figure 2 ACTLUs will be sent for TN3X1100 and TN3X1101 The server sends a positive response and sets SLU DISABLED The LOCADDR of these LUs are put into the specific LU cache and reserved for specific LU name requests only To allow sufficient time for the VTAM host to send all the ACTLUs a 30 second timer is started and restarted when an ACTLU is received When the time expires it is assumed a
24. R LSAP Isap token adapter 1 84 configuration mode To return later to the DLUR LSAP configuration mode on the same entity perform the following task beginning in TN3270 DLUR configuration mode Task Command Enter DLUR LSAP configuration mode on the Isap token adapter 1 same LSAP To remove an entity the same identification parameters are needed Perform the following task beginning in TN3270 DLUR configuration mode Task Command Remove a previously defined DLUR LSAP entity no Isap token adapter 1 TN3270 configuration modes described in this section include the following TN3270 Server Configuration Mode DLUR Configuration Mode DLUR SAP Configuration Mode PU Configuration Mode Commands Allowed in Multiple Modes 10 Configuring TN3270 Server on the Channel Interface Processor TN3270 Configuration Modes Figure 3 1TN3270 Configuration Modes N3270 configuration mode TN3270 DLUR configuration mode TN3270 DLUR SAP configuration mode TN3270 PU TN3270 DLUR PU configuration mode TN3270 Server Configuration Mode From interface configuration mode tn3270 server command puts you in TN3270 server configuration mode Prompt tn3270 server gt DLUR Configuration Mode From TN3270 server configuration mode the dlur command puts you in DLUR configuration mode Prompt tn3270 dlur gt Prompt tn3270 serve
25. U configuration mode A value entered in TN3270 mode applies to all PUs for that TN3270 server except as overridden by values entered in PU configuration mode The tep port command affects only future TN3270 sessions The no tep port command entered in PU configuration mode removes the override Example The following command entered in TN3270 configuration mode returns the TCP port value to 23 no tcp port 52 TN3270 Server Commands timing mark timing mark Use the timing mark TN3270 configuration mode command to select whether a DO TIMING MARK is transmitted when the host application needs an SNA response definite or pacing response Use the no form of the command to turn off DO TIMING MARK transmission except as used by the keepalive function timing mark no timing mark Syntax Description This command has no arguments or key words Default No DO TIMING MARKS are transmitted except by keepalive Command Mode TN3270 configuration Usage Guidelines If timing mark is configured the TN3270 server will send DO TIMING MARK as necessary to achieve an end to end response protocol Specifically DO TIMING MARK will be sent if any of the following are true The host application has requested a pacing response The host application has requested a Definite Response and either the client is not using TN3270E or the request is not Begin Chain The use of the timing mark command can degrade performance Some clients
26. a lan number The no Isap command hierarchically deletes any links using it Any sessions using those links are lost 28 1TN3270 Server Commands Isap Example The following command defines an adapter type an adapter number and a local SAP lsap token 0 BO Related Commands adapter lan TN3270 Server Commands 29 maximum lus maximum lus Use the maximum lus TN3270 configuration command to limit the number of LU control blocks that will be allocated for TN3270 server use Use the no form of this command to restore the default value maximum lus number no maximum lus Syntax Description number Maximum number of LU control blocks allowed The allowed range is 0 to 32000 However the practical upper limit for concurrently operating TN3270 sessions depends on the hardware and usage characteristics The default is 2100 Default Because of the license structure the default is 2100 which represents the limit of a typical license 2000 plus a 5 percent buffer If you configure a value greater than the default a license reminder is displayed Command Mode TN3270 configuration Usage Guidelines Although the value may be varied at any time reducing it below the current number of LU control blocks will not release those blocks until a PU is inactivated by DACTPU or by using the no pu command If the number of LUs in use reaches 94 percent of the current setting of maximum lus a warning message is displayed
27. allowed maximum lus max number of lu allocated Optional Configure transmission of a WILL TIMING MARK timing mark Optional Assign a TCP port other than the default of 23 This command is also available in PU configuration mode tep port port nbr Optional Specify the idle time for server disconnect This command is also available in PU configuration mode idle time num of seconds Optional Specify the maximum time allowed between keepalive marks before the server disconnects This command is also available in PU configuration mode keepalive num of seconds Optional Specify whether the TN3270 session will disconnect when an UNBIND command is received This command is also available in PU configuration mode unbind action keep disconnect Optional Select whether left over LUs can be used from a generic LU pool This command is also available in PU configuration mode generic pool permit deny When you use the tn3270 server command you enter TN3270 configuration mode and can use all other commands in the task list You can later override many configuration values you enter in TN3270 configuration mode from PU configuration mode On IBM host systems these types of commands are often referred to as sift down commands because their values can sift down through several levels of configuration and can be optionally altered at each configuration level Configure PU Parameters
28. as started 36 TN3270 Server Commands show extended channel tn3270 server Table 5 Show tn3270 server Field Descriptions Continued Field Description DISCONN number Total number of disconnects since the TN3270 feature was started FAIL number Total number of failed connects since the TN3270 feature was started RESPONSE TIME HOST number The average response time from the host across all sessions through this server IP address This is measured from sending CD to the host to receiving the reply RESPONSE TIME TCP number Average response time from the clients on this server IP address This is measured only when TIMING MARKS are sent If no timing mark is configured they are only sent on special occasions such as Bind IDLE TIME number Configured idle time for this PU KEEPALIVE number Configured keepalive for this PU UNBIND ACTION type Configured unbind action for LUs on this PU TCP PORT number Configured TCP port number GENERIC POOL type Configured generic pool for LUs on this PU DLUR fq cpname Configured fully qualified DLUR CP name STATUS Possible DLUR DLUS status values and their meanings are reset The DLUR DLUS pipe is reset pnd actv The DLUR DLUS pipe is pending active active The DLUR DLUS pipe is active pnd inac The DLUR DLUS pipe is pending inactive DLUS fq dlusname Currently active DLUS NAME pu name This is th
29. ation command to specify how many seconds of inactivity elapse before transmission of a DO TIMING MARK to the TN3270 client Use the no form of this command to cancel the keepalive period and return to the default keepalive seconds no keepalive Syntax Description seconds Number of seconds from 0 to 65535 A value of 0 means no keepalive signals are sent The default is 1800 seconds 30 minutes Defaults The default in TN3270 configuration mode is 1800 seconds 30 minutes The default in PU configuration mode is the value currently configured in TN3270 configuration mode Command Modes TN3270 configuration PU configuration Usage Guidelines The keepalive command can be entered in either TN3270 configuration mode or PU configuration mode A value entered in TN3270 mode applies to all PUs for that TN3270 server except as overridden by values entered in PU configuration mode A no keepalive command entered in PU configuration mode will restore the keepalive value entered in TN3270 command mode If the client does not reply within 30 minutes of the transmission of the DO TIMING MARK the TN3270 server disconnects the TN3270 session The DO TIMING MARK is a Telnet protocol operation that does not affect the client operation If the IP path to the client is broken the TCP layer will detect the failure to acknowledge the DO TIMING MARK and initiate disconnection This action will usually take much less than 30 minutes The keepa
30. call Customer Service The CD is available both as a single CD and as an annual subscription You can also access Cisco technical documentation on the World Wide Web URL http www cisco com This document is to be used in conjunction with the Router Products Release Notes for Cisco IOS Release 11 0 publication AccessPath AtmDirector the CCIE logo CD PAC Centri Centri Bronze Centri Gold Centri Security Manager Centri Silver the Cisco Capital logo Cisco IOS the Cisco IOS logo CiscoLink the Cisco NetWorks logo the Cisco Powered Network logo the Cisco Press logo ClickStart ControlStream Fast Step FragmentFree IGX JumpStart Kernel Proxy LAN LAN Enterprise LAN 2LAN Remote Office MICA Natural Network Viewer NetBeyond Netsys Technologies Packet PIX Point and Click Internetworking Policy Builder RouteStream Secure Script SMARTnet StrataSphere StrataSphere BILLder StrataSphere Connection Manager StrataSphere Modeler StrataSphere Optimizer Stratm Stream View SwitchProbe The Cell TrafficDirector VirtualStream VlanDirector Workgroup Director Workgroup Stack and XCI are trademarks Empowering the Internet Generation and The Network Works No Excuses are service marks and BPX Catalyst Cisco Cisco Systems the Cisco Systems logo EtherChannel FastHub FastPacket ForeSight IPX LightStream OptiClass Phase IP StrataCom and StrataView Plus are registered trademarks of Cisco Systems Inc in the U S and certain othe
31. ched and will open SAP 8 on adapter 0 HOSTB is reached via token ring HOSTC is channel attached non APPN and will open SAP 4 on adapter 0 enter interface configuration mode for the virtual interface in slot 2 router config int channel 2 2 create TN3270 Server entity router config if tn3270 server set server wide defaults for PU parameters router cfg tn3270 keepalive 0 router cfg tn3270 unbind action disconnect router cfg tn3270 generic pool permit define DLUR parameters and enter DLUR configuration mode router cfg tn3270 dlur SYD TN3020 SYD VMG create PUs under DLUR Note that the first two share an IP address router tn3270 dlur pu pu0 05099001 10 10 20 1 router tn3270 dlur pu pu pul 05d99002 10 10 20 1 router tn3270 dlur pu pu pu2 05d99003 10 10 20 2 create a DLUR LSAP and enter DLUR LSAP configuration mode router tn3270 dlur pu lsap token adapter 1 specify the VRN name of the network containing this lsap router tn3270 dlur lsap vrn syd lan4 create a link from this lsap router tn3270 dlur lsap link hosta rmac 4100 cafe 0001 rsap 8 router tn3270 dlur lsap link hostb rmac 4000 7470 0009 rsap 4 router tn3270 dlur lsap exit tn3270 dlur exit router Configuring TN3270 Server on the Channel Interface Processor 17 TN3270 Configuration Task List create direct pus for the non APPN Host note that they must use different lsaps because they go t
32. d by the SNA session switch and the LU name for the DLUR function configured as the fg cpname on the dlur statement CURRENT DLUS fq luname Name of the currently active DLUS either the primary DLUS or the backup DLUS DLUR DLUS STATUS Possible DLUR DLUS status values and their meanings are dlur status reset The DLUR DLUS pipe is reset e pnd actv The DLUR DLUS pipe is pending active e active The DLUR DLUS pipe is active pnd inac The DLUR DLUS pipe is pending inactive PREFERRED DLUS fq luname Name of the DLUS as configured on the DLUR statement BACKUP DLUS fq luname Name of the DLUS that is used if the preferred DLUS is unavailable PREFERRED SERVER Fully qualified name of the preferred network node server Jq luname LSAP Configured value for the local SAP on the configured internal adapter Token adapter specifies the type of internal adapter used 42 1TN3270 Server Commands show extended channel tn3270 server dlur Table 7 Show tn3270 server dlur Field Descriptions Continued Field Description VRN fq name Name of the connection network as configured by the virtual routing node VRN statement for this LSAP and internal adapter pair LSAP STATUS status Possible sap status values and their meanings are e inactive Not connected to adapter e pnd actv SAP activation in progress e active SAP open e pnd inac SAP deactivation in progress LINK name
33. do not support timing mark used in this way Therefore timing mark should only be configured where both of the following are true All clients support this usage The application benefits from end to end acknowledgment Example The following command enables TIMING MARK transmission timing mark Related Commands idle timer keepalive TN3270 Server Commands 53 tn3270 server tn3270 server Use the tn3270 server interface configuration command to start the TN3270 server on a CIP or to enter TN3270 configuration mode Use the no form of this command to disable all TN3270 server activity on a CIP tn3270 server no tn3270 server Syntax Description This command has no arguments or keywords Default No TN3270 server function is enabled Command Mode Interface configuration Usage Guidelines Only one TN3270 server can run on a CIP It will always be configured on port 2 which is the internal LAN interface port The no tn3270 server command shuts down TN3270 server immediately All active sessions will be disconnected and all DLUR and PU definitions deleted from the router configuration To restart a TN3270 server you must reconfigure all parameters Example The following command starts the TN3270 server and enters TN3270 configuration mode tn3270 server 54 1TN3270 Server Commands unbind action unbind action Use the unbind action TN3270 configuration command to select what action to take when t
34. e name of the PU as configured IP TCP ip addr tcpport IP address and TCP port number configured for the PU XID number Configured XID idblk and idnum STATE value Possible STATE values and their meanings are e shut tThe PU is configured but in shut state e reset The link station of this PU is not active e test PU is sending a TEST to establish link e xid TEST is responded XID is sent e p actpu The link station is up but no ACTPU is received e active ACTPU is received and acknowledged positively e act busy Awaiting host to acknowledge the SSCP PU data e wait Waiting for PU status from CIP e other PU in undefined state p rqactpu r DLUR PU is pending request ACTPU response e p active ACTPU received by DLUR but not yet passed to PU e p dactpu PU is pending DACTPU TN3270 Server Commands 37 show extended channel tn3270 server Table 5 Show tn3270 server Field Descriptions Continued Field Description LINK type LINK type is either internal adapter type and internal adapter number or dlur if it is a SNA Session Switch PU DESTINATION mac address or PU name If a direct PU then it is the destination MAC address otherwise it is the name of the partner PU R LSAP number number 38 TN3270 Server Commands Remote and local SAP values show extended channel tn3270 server client ip address show extended channel tn3270 server client ip addr
35. e same logical network Example The following command specifies SYD VMX as the backup DLUS dlus backup SYD VMX TN3270 Server Commands 21 generic pool generic pool Use the generic pool TN3270 configuration command to specify whether or not left over LUs will be made available to TN3270 sessions that do not request a specific LU or LU pool through TN3270E Use the no form of this command to selectively remove the permit or deny condition of generic pool use generic pool permit deny no generic pool Syntax Description permit Left over LUs should be made available to TN3270 users wanting generic sessions This value is the default deny Left over LUs should not be given to a generic pool The physical unit PU is not automatically fully populated with 255 LOCADDR definitions The default is the value configured in TN3270 configuration mode Defaults In TN3270 configuration mode generic pool use is permitted In PU configuration mode the default is the value currently configured in TN3270 configuration mode Command Modes TN3270 configuration PU configuration Usage Guidelines A left over LU is defined as one for which all of the following conditions are true The system services control point SSCP did not send an ACTLU during PU start up and The PU controlling the LU is capable of carrying product set ID PSID vectors on network management vector transport NMVT messages thus allowing dynamic de
36. emory Memory Runs From Enterprise Set 8 MB Flash memory 24 Mb 32 Mb RAM rsp k mz card Enterprise CIP2 Set 8 MB Flash memory 24 Mb 32 Mb RAM rsp k2 mz card Cisco IOS Release 11 0 BT Release Note and Update to Configuration Guides and Command References 3 Update to Configuration Guide Cisco 7500 Series and Cisco 7000 Minimum Required Required Main Required CIP Release 11 0 with RSP7000 Code Memory Memory Memory Runs From Required Code Required CIP Release 11 0 Cisco 7000 Series Memory Memory Runs From Enterprise Set 8 MB Flash memory 16 Mb 32 Mb RAM gs7 k mz card Enterprise CIP2 Set 8 MB Flash memory 16 Mb 32 Mb RAM gs7 k2 mz card Microcode Software Note that microcode software images are bundled with the system software image Bundling eliminates the need to store separate microcode images When the router starts up the system software unpacks the microcode software bundle and loads the proper software on all the interface processor boards New Software Features in 11 0 10 BT The TN3270 server is a new feature on the CIP of the Cisco 7000 family of routers The TN3270 server allows TN3270 clients access to IBM and IBM compatible mainframes It can reduce the cycles spent by the mainframe on TCP IP and TN3270 processing by a factor of ten or more and off load the TCP IP and TN3270 cycles from the mainframe The TN3270 server supports up to 8000 CIP1 or up to 16000 CIP2 concurrent sessions while mos
37. ess Use the show extended channel tn3270 server client ip address privileged EXEC command to display information about all clients at a specific IP address show extended channel s ot 2 tn3270 server client ip address ip address Syntax Description slotl2 Optional Specifies a particular CIP in the router where slot is the slot number The port value for a TN3270 server will always be 2 ip address Command Mode Privileged EXEC Sample Display IP address of the client The following is sample output on the Cisco 7000 from the show extended channel tn3270 server client ip address command router show extended channel 3 2 tn3270 server client ip 171 69 136 130 lu name client ip tcp state model frames in out idle for 1 171 69 136 130 3736 INACTIVE 327904E 23 18 3 37 58 pu is TN3PU02 lu is DYNAMIC type 0 negotiated TN3270 bytes 509 in 3438 out RuSize 0 in 0 out NegRsp 0 in 0 out pacing window 0 in 1 out credits 0 in queue size 0 in 0 out traces dynamic timer expired warm actpu req warm actpu req warm actpu req warm actpu req warm actpu req warm actpu req warm actpu req len 9 2C0001010009838100 OUT len 15 2CxXxxxxxxx0A038120F3000501FF len 9 2C000101000A838100 len 170 xxxxxxxxxx0403922088000D818080 OUT len 1730 2Cxxxxxxxx0B0381207EC3110000 len 9 2C000101000B838100 OUT len 55 2DxXxXXXXXXX276B8000320F000000 len 10 2D000101D427EB800032 lu name client ip tcp state model frames in out
38. etwork name vrn vrn name no vrn Syntax Description vin name Fully qualified virtual routing node VRN name Default The adapter is not considered to be part of a connection network Command Mode DLUR SAP configuration Usage Guidelines The vrn command is used to discover routes without having to configure all possible links A connection network is also known as a shared access transport facility SATF This means at the MAC level that all nodes in the network can reach each other using the same addressing scheme and without requiring the services of SNA session routing A bridged LAN whether source route or transparent is an example Such a network is represented in the APPN topology as a kind of node termed a VRN To make use of this function all APPN nodes must use the same VRN name for the SATF Refer to the VTAM operating system documentation for your host system for additional information regarding the VTAM VNGROUP and VNNAME parameters on the PORT statement of an XCA major node Several parameters in the DLUR configuration mode consist of fully qualified names as defined by the APPN architecture Fully qualified names consist of two case insensitive alphanumeric strings separated by a period However for compatibility with existing APPN products including VTAM the characters pound at and dollar are allowed in the fully qualified name strings Each string is from one to eight cha
39. finition of dependent LU DDDLW operation for that LU All LUs in the generic pool are by definition DDDLU capable Values entered for generic pool in TN3270 configuration mode apply to all PUs for that TN3270 server but can be changed in PU configuration mode In PU configuration mode a no generic pool command will restore the generic pool value entered in TN3270 command mode In TN3270 configuration mode the no generic pool command reverts to the default which permits generic pool use The command takes effect immediately If generic pool deny is specified on a PU no further dynamic connections to it will be allowed Existing sessions are unaffected but as they terminate the LUs will not become available for dynamic connections 22 1TN3270 Server Commands generic pool Similarly if generic pool permit is specified any inactive LUs are immediately available for dynamic connections Moreover any active LUs that were dynamic previously before generic pool deny was issued return to being dynamic Example The following command permits generic LU pool use generic pool permit TN3270 Server Commands 23 idle time idle time Use the idle time TN3270 configuration command to specify how many seconds of LU inactivity from both host and client before the TN3270 session is disconnected Use the no form of this command to cancel the idle time period and return to the default idle time seconds no idle time Syn
40. generic pool permit deny no shutdown Values entered in PU configuration mode override settings made in TN3270 configuration mode In addition the no form of these commands entered in PU configuration mode will restore the command value entered in TN3270 command mode 12 Configuring TN3270 Server on the Channel Interface Processor TN3270 Configuration Task List TN3270 Configuration Task List The following sections describe how to configure TN3270 server support on the CIP Not all tasks are required Refer to TN3270 Configuration Example for configuration examples Note The TN3270 server is configured on an internal LAN interface in the CIP which is port 2 of a CIP Port 0 and port 1 represent physical interface ports port 2 is a virtual port and is always reserved for the internal LAN interface Task List for Multiple APPN Hosts When the host site uses APPN and the TN3270 server can reach multiple hosts we recommend you use the SNA Session Switch feature and configure your PUs under DLUR In this instance perform the following tasks Configure SNA Support Configure TN3270 Server Configure DLUR Configure SAPs under DLUR Configure PUs under DLUR Monitor the TN3270 Server Note You can also use DLUR to reach a mix of APPN and non APPN hosts The host owning the PUs must be an APPN network node that also supports the subarea that is an interchange node When an SLU starts a session
41. he TN3270 server receives an UNBIND Use the no form of this command to restore the default unbind action keep disconnect no unbind action Syntax Description keep No automatic disconnect will be made by the server upon receipt of an UNBIND disconnect LUT2 session clients will be disconnected upon receipt of an UNBIND LUT1 and LUT3 session clients are not automatically disconnected Defaults In TN3270 configuration mode the default is disconnect In PU configuration mode the default is the value currently configured in TN3270 configuration mode Command Modes TN3270 configuration PU configuration Usage Guidelines The unbind action command can be entered in either TN3270 configuration mode or PU configuration mode A value entered in TN3270 mode applies to all PUs for that TN3270 server except as overridden by values entered in PU configuration mode The unbind action command affects currently active and future TN3270 sessions The no unbind action command entered in PU configuration mode removes the override The unbind action command affects currently active and future TN3270 sessions Example The following command prevents automatic disconnect unbind action keep TN3270 Server Commands 55 vrn vrn Use the vrn DLUR SAP configuration command to tell the SNA session switch which connection network the internal adapter interface on the CIP card belongs to Use the no form of this command to remove a n
42. he model string refers to 3270 extended datastream It has no connection with the E in T N3270E Any other string is forwarded as is In all cases the string forwarded is translated from ASCII to EBCDIC and truncated at seven characters A complication arises with TN3270E clients that request a copy of the BIND IMAGE Such clients require system control services SCS datastream on the system services control point SSCP LU flow All other clients require 3270 datastream on that flow Therefore these two kinds of client must be directed to different LUGROUP entries at the host To make this as easy as possible the SCS requirement is also encoded into the model string sent to the host Following the previously described terminal type string formats accepted by the server this additional condition is applied If the client has negotiated to receive BIND IMAGE the character S is overlaid on the fifth character of the string or appended if the string is less than five characters See Table 3 Table 3 Examples of Model String Mapping BIND IMAGE String from client ASCII requested String to Host EBCDIC IBM 3278 4 No 327804 IBM 3279 5E No 327905E IBM 3279 3 E Yes 3279S5E IBM DYNAMIC Yes DYNASIC ABC Yes ABCS ABCDEFGH Yes ABCDSFG Specific LU Allocation A TN3270E client can request a specific LU name by using the TN3270E command CONNECT as documented in RFC 1647 The name requested must
43. idle for 4 171 69 136 130 4074 INACTIVE 327904E 77 58 6 49 55 pu is TN3PU02 lu is DYNAMIC type 0 negotiated TN3270 bytes 1308 in 21068 out RuSize 0 in 0 out NegRsp 0 in 0 out pacing window 0 in 1 out credits 0 in queue size 0 in 0 out traces Reply PSID pos rsp actlu req bind req TN3270 Server Commands 39 show extended channel tn3270 server client ip address sdt req unbind req Client disconnect req notify resp warm actpu req OUT len 28 2CxXXXXXxxx16038100F14011C3F0 IN len 9 2C0001040016838100 OUT len 35 2DxxxxxXxxxX3D6B80003201000000 IN len 10 2D000104043DEB800032 OUT len 132 2Cxxxxxxxx0303800005C21D607C IN len 9 2C0000040003838000 IN len 20 XXXXXXXXXX110B80008106200C0600 OUT len 12 2CxXxxxxxxx118B8000810620 Table 6 describes significant fields in the display Table6 Show tn3270 server client ip address Field Descriptions Field Description LU locaddr LOCADDR of the LU LU lu name If the PU is directly connected then the name shown is the one generated by the seed If DLUR then only the unqualified portion is shown The NETID portion will be the same as the current DLUS CLIENT IP TCP ip addr tcpport Client s IP address and TCP port number STATE lu state The LU state and their meanings are e unknown LJU in an undefined state e inactive LU didn t receive ACTLU e active LU received ACTLU and acknowledged positively e p sdt LU is bound but there
44. l NN server The alternative is to configure the NN servers to connect to DLUR If VRN is used it is not necessary to configure links to other hosts Do not configure multiple links to the same host Configure PUs under DLUR Command link name rmac rmac rsap rsap This task is required when configuring DLUR connected hosts To configure PUs under the DLUR function perform the following tasks beginning in DLUR configuration mode Task Create a PU function under DLUR and enter PU configuration mode Command pu pu name idblk idnum ip address Assign a TCP port other than the default of 23 tep port port nbr Specify the idle time for server disconnect idle time num of seconds Specify the maximum time allowed between keepalive marks before the server disconnects keepalive num of seconds Specify whether the TN3270 session will disconnect when an UNBIND command is received unbind action keep disconnect Select whether left over LUs can be used from a generic LU pool generic pool permit deny The pu command entered in DLUR configuration mode has different parameters than when it is entered from TN3270 configuration mode Monitor the TN3270 Server The following table lists some of the monitoring tasks specific to the TN3270 server To display the full list of show commands enter show at the EXEC prompt Use the following commands in privileged EXEC mode Task
45. live command affects currently active and future TN3270 sessions For example reducing the value to a smaller nonzero value will cause an immediate burst of DO TIMING MARKs on those sessions that have been inactive for a period of time greater than the new smaller value Examples The following command sets a keepalive disconnect value of 15 minutes 900 seconds keepalive 900 The following command entered in TN3270 configuration mode sets the keepalive disconnect value to 1800 seconds the default no keepalive TN3270 Server Commands 25 link link Use the link DLUR SAP configuration command to define and activate a link to a host Use the no form of this command to delete the link definition link name rmac rmac rsap rsap no link name Syntax Description name Link name from one to eight alphanumeric characters The first character must be alphabetic The name must be unique within the DLUR function rmac Optional Remote MAC address of the form XXXX XXXX XXXX in hexadecimal If not specified a loopback link to another SAP on the same internal LAN adapter is assumed rsap Optional Remote SAP address 04 to FC in hexadecimal The rsap value must be even and should be a multiple of 4 but this requirement is not enforced The rsap value default is 04 Defaults No DLUR link is defined The default remote SAP address is 04 hexadecimal Command Mode DLUR SAP configuration Usage Guidelines The combina
46. ll ACTLUs defined in VTAM for the PU have been sent All LUs that have not been activated are available in a generic LU pool to be used for DDDLU unless they have been reserved by the configuration using the generic pool deny TN3270 configuration command Configuring TN3270 Server on the Channel Interface Processor 9 TN3270 Configuration Modes After the VTAM activation the server can support session requests from clients using dynamic or specific LU allocation TN3270 Configuration Modes The TN3270 configuration modes and router command prompts are described in the following sections and displayed in Figure 3 The TN3270 server can be configured only on Port 2 the internal LAN port of a CIP card Some configuration commands create entities on the CIP For most of these the command changes to the mode associated with that entity for example a PU In general the parameters provided to create the entity come in two sets those which identify the specific instance of the entity for example a PU name and those that merely set operating parameters To return to the mode later the same command is used but with only the first set of parameters The following example tasks clarify how to return to a command mode without necessarily creating a new entity To create a DLUR LSAP and enter DLUR LSAP configuration mode perform the following task beginning in TN3270 DLUR configuration mode Task Command Create a DLUR LSAP and enter DLU
47. mand has no arguments or keywords Default The interface or entity is enabled Command Modes CIP interface configuration TN3270 configuration PU configuration DLUR configuration DLUR SAP configuration Usage Guidelines In CIP interface configuration mode the command applies to the entire CIP In TN3270 configuration mode the command applies to the whole TN3270 Server In PU configuration mode the command applies to the DLUR or direct PU In DLUR configuration mode the command applies to the whole DLUR subsystem In DLUR SAP configuration mode the command applies to the local SAP Example The following command issued in TN3270 configuration mode shuts down the entire TN3270 server shutdown TN3270 Server Commands 51 tcp port tcp port Use the tep port TN3270 configuration command to override the default TCP port setting of 23 Use the no form of this command to restore the default tcep port port number no tcp port Syntax Description port number A valid TCP port number in the range of 0 to 65534 The default is 23 which is the IETF standard The value 65535 is reserved by the TN3270 server Defaults In TN3270 configuration mode the default is 23 In PU configuration mode the default is the value currently configured in TN3270 configuration mode Command Modes TN3270 configuration PU configuration Usage Guidelines The tep port command can be entered in either TN3270 configuration mode or P
48. n mode and can use all other commands in this task list Configuration values you enter in PU configuration mode will override other values entered while in TN3270 configuration mode In addition you can enter PU configuration mode from DLUR configuration mode when configuring PUs that are connected by means of DLUR If you are configuring PUs for directly connected hosts you need not perform any additional configuration tasks Configure DLUR This task is required when configuring DLUR connected hosts To configure DLUR parameters for the TN3270 server perform the following tasks beginning in TN3270 configuration mode Task Command Create a DLUR function in the TN3270 server and dlur fqg cpname fq dlusname enter DLUR configuration mode Optional Specify the fallback choice for the dlus backup dlusname2 DLUR DLUS Optional Specify the preferred network node preferred nnserver NNserver NN server Configure SAPs under DLUR To configure SAPs under the DLUR function perform the following tasks beginning in DLUR configuration mode Task Command Create a SAP function under DLUR and enter Isap type adapno Isap DLUR SAP configuration mode Optional Identify an APPN virtual routing node vrn vin name VRN Configuring TN3270 Server on the Channel Interface Processor 15 TN3270 Configuration Task List Task Optional Create named links to hosts A link should be configured to each potentia
49. o the same Host router cfg tn3270 pu pu3 05d00001 10 10 20 5 tok 1 24 rmac 4100 cafe 0001 lu seed pu3 router tn3270 pu pu pu4 05d00002 10 10 20 5 tok 1 28 rmac 4100 cafe 0001 lu seed pu4 router tn3270 pu end The resulting configuration from the initial configuration and the configuration dialog follows interface Channel2 2 ip address 10 10 20 126 255 255 255 128 no ip redirects no ip directed broadcast ip pim query interval 0 ip igmp query interval 0 no ip route cache no keepalive no clns checksum clns congestion threshold 0 clns erpdu interval 0 clns rdpdu interval 0 no clns route cache no clns send erpdu no clns send rdpdu lan TokenRing 0 source bridge 223 1 2099 adapter 0 4100 cafe 0001 llc2 N1 2057 adapter 1 4100 cafe 0002 llc2 N1 2057 tn3270 server pu PU3 05D00001 10 10 20 5 token adapter 1 24 rmac 4100 cafe 0001 lu seed PU3 pu PU4 05D00002 10 10 20 5 token adapter 1 28 rmac 4100 cafe 0001 lu seed PU4 dlur SYD TN3020 SYD VMG lsap token adapter 1 vrn SYD LAN4 link HOSTB rmac 4000 7470 0009 link HOSTA rmac 4100 cafe 0001 rsap 08 pu PUO 05D99001 10 10 20 1 pu PU1 05D99002 10 10 20 1 pu PU2 05D99003 10 10 20 2 18 Configuring TN3270 Server on the Channel Interface Processor Update to Command Reference Update to Command Reference The information that follows is an update to the Router Products Command Reference Chapters 23 to 33 Add the TN3270 information as a standalone chapter following page
50. on switch PU Sample Displays The following is sample output on the Cisco 7000 from the show extended channel tn3270 server pu command for a direct PU router show extended channel 3 2 tn3270 server pu EXT2 name index Peck oe xid state link destination r lsap EXT2 1 172 28 1 106 23 05D18092 ACTIVE tok 0 4000 7470 00e7 08 04 idle time 0 keepalive 0 unbind act discon generic pool perm bytes 100 in out frames 90 in 4 out NegRsp 6 in 0 out actlus 4 dactlus 0 binds 0 lu name client ip tcp state model frames in out idle for al EXT2001 171 69 176 34 1897 ACTIVE 327805 1 1 4 32 49 2 EXT2002 never connected ACTIVE T T 4 32 49 The following is sample output on the Cisco 7000 from the show extended channel tn3270 server pu command for a SNA session switch PU router show extended channel 3 2 tn3270 server pu INT1 name index ip tcp xid state link destination r lsap INT1 5 172 28 1 106 23 05D18091 ACTIVE dlur MPX GOAN1 idle time 0 keepalive 0 unbind act discon generic pool perm bytes 50 in out frames 87 in 2 out NegRsp 3 in 0 out actlus 2 dactlus 0 binds 0 lu name client ip tcp state model frames in out idle for ils GOAN1X01 never connected ACTIVE de 1 0 32 14 2 GOAN1X02 never connected ACTIVE ls ls 0 32 14 TN3270 Server Commands 45 show extended channel tn3270 server pu Table 9 describes significant fields in the display Table 9 Show tn3270 server pu Field Descriptions Field NAME pu name
51. on the console To prevent constant warning displays the threshold for generating such messages is raised for a period The TN3270 server attempts to allocate one LU control block for each LU activated by the hosts In the case of dynamic definition of dependent LU DDDLU the control block is allocated when the client requests the LU in anticipation of an ACTLU from the SSCP host By limiting the number of LU control blocks allocated you can make sure enough memory is available to support other CIP functions The control blocks themselves take about K bytes per LU During session activity a further 2 K per LU may be needed for data On a CIP 32 MB of memory will support 4000 LUs To support more than 4000 LUs we recommend 64 MB of memory Example The following command allows 5000 LU control blocks to be allocated maximum lus 5000 Related Command pu 30 1TN3270 Server Commands preferred nnserver preferred nnserver Use the preferred nnserver DLUR configuration command to specify a preferred network node NN as server Use the no form of this command to remove the preference preferred nnserver name no preferred nnserver Syntax Description name A fully qualified name of a NN Default This command has no defaults Command Mode DLUR configuration Usage Guidelines Fully qualified names consist of two case insensitive alphanumeric strings separated by a period However for compatibility with existing APPN prod
52. onnection stats gt lt response time ms gt server ip tcp lu in use connect disconn fail host tcp 172 528 1420623 23 510 1 12 DI 0 54 40 L228 10107 223 511 0 0 0 0 0 0 172 28 1 108 23 255 0 0 0 0 0 0 total 1276 ils configured max_lu 20000 idle time 0 keepalive 1800 unbind action disconnect tcp port 23 generic pool permit no timing mark dlur MPX GOANCP status NOTOQRYD SHUT dlus MPX NGMVMPC name index Fp tEp xid state link destination r lsap EXT2 1 72 28 1 106 23 05D18092 ACTIVE tok 0 4000 7470 00e7 08 04 PUS10 2 72 28 1 107 23 05D19010 ACTIVE tok 0 4000 7470 00e7 08 2C PUS11 3 T2728 1s 109323 05D19011 ACTIVE tok 0 4000 7470 00e7 08 28 PUS12 4 72 28 1 108 23 05D19012 ACTIVE tok 0 4000 7470 00e7 08 24 PUS9 5 172 281 109723 05D18509 SHUT tok 0 4001 3745 1088 04 40 SDTF 7 AZ 28 41 107223 12345678 ACTIVE tok 0 0800 5a4b 1cbc 04 08 TEST 8 72 28 1 106 23 05D18091 ACTIVE tok 0 4000 7470 00e7 08 30 INT1 6 72 28 1 106 23 05D18091 SHUT dlur Table 5 describes significant fields in the display Those fields not described correspond to configured values Table5 Show tn3270 server Field Descriptions Field Description SERVER IP TCP IP address and TCP port number listening point configured on one or more PUs LU number Total number of LUs available for this listening point IN USE number Number of LUs currently in use CONNECT number Total number of connect ins since the TN3270 feature w
53. or applications can be configured with different IP address Table 4 Direct PU Configuration in Router Adapte Comman PU r d Name IDBLK IP address Type number LSAP RMAC RMAC LU seed LU name pu X1 05D30001 192 195 80 40 tok 1 4 rmac 4100 cafe 0001 lu seed TN3X1 pu X2 05D30002 171 69 176 43 tok 1 8 rmac 4100 cafe 0002 lu seed TN3X2 From the pu direct TN3270 configuration command values shown in Table 4 PU X2 establishes a link to a host at SAP 8 on MAC address 4100 cafe 0002 A client connecting to IP address 171 69 176 43 is allocated an LU from that PU and is routed to that host Note that by using the DLUR function all the LUs in the server can be defined and owned by a controlling VTAM When a client requests an application residing on a different VTAM host the controlling VTAM will issue the request to the target host which will send a BIND directly to the client All LU LU data will then flow directly between the target host and the client without needing to go through the controlling VTAM VTAM Host Configuration Considerations for Dynamic LU Allocation Other non Cisco implementations of TN3270 support depend on predefined static pools of LUs to support different terminal types requested by the TN3270 clients The CIP TN3270 server implementation removes the static nature of these configurations by using a VTAM release 3 4 feature dynamic definition of dependent LU DDDLU Refer to the VTAM operating system manuals for yo
54. ormation You can access CCO in the following ways WWW http www cisco com WWW http www europe cisco com WWW http www china cisco com Telnet cco cisco com Modem From North America 408 526 8070 from Europe 33 1 64 46 40 82 Use the following terminal settings VT100 emulation databits 8 parity none stop bits 1 and connection rates up to 28 8 kbps For a copy of CCO s Frequently Asked Questions FAQ contact cco help cisco com For additional information contact cco team cisco com Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract contact Cisco s Technical Assistance Center TAC at 800 553 2447 408 526 7209 or tac cisco com To obtain general information about Cisco Systems Cisco products or upgrades contact 800 553 6387 408 526 7208 or cs rep cisco com Cisco Connection Documentation The complete caveats against this release are available on the Cisco Connection Documentation Enterprise Series CD formerly UniverCD which is the Cisco library of product information on CD ROM On CD access the Cisco IOS 11 0 caveats in the Cisco IOS Release 11 0 database TN3270 Server Commands 57 Cisco Connection Documentation The CD is updated and shipped monthly so it might be more current than printed documentation To order the CD contact your local sales representative or
55. ote and Update to Configuration Guides and Command References Release Note Platform Support Cisco IOS Release 11 0 BT supports the following router platforms Cisco 7500 series Cisco 7000 series and Cisco 7000 series with RSP7000 Cisco IOS Packaging The following feature sets are available in Release 11 0 BT Refer to the Router Products Release Notes for Cisco IOS Release 11 0 for a list of the features provided in the Cisco 7000 and Cisco 7500 series feature sets Enterprise this feature set includes CIP Enterprise CIP2 Boot ROM Requirements Boot ROMs that support Cisco IOS Release 11 0 are required No special requirements exist for Cisco IOS Release 11 0 BT CIP Boot Image Requirements The CIP boot image is bundled in the Cisco IOS Release 11 0 BT image You must have the image that supports your CIP or your CIP2 hardware You cannot run a CIP and a CIP2 card in the same router See Table 1 for a list of image names and supported CIP or CIP2 cards Table 1 11 0 BT Image Names for CIP and CIP2 Hardware Image Names Supported CIP Hardware rsp k mz CIP rsp k2 mz CIP2 gs7 k mz CIP gs7 k2 mz CIP2 Memory Requirements The memory requirements for Cisco IOS 11 0 BT are shown in Table 2 The CIP supports up to 128 Mb of memory Table 2 11 0 BT Memory Requirements Cisco 7500 Series and Cisco 7000 Minimum Required Required Main Required CIP Release 11 0 with RSP7000 Code Memory M
56. ould use as host IP address to map to LU sessions under this PU Default No PU is defined Command Mode DLUR configuration Usage Guidelines If the PU is already created the pu pu name command with no arguments puts you in PU configuration mode In this mode you can modify an existing PU DLUR entity A typical usage for the IP address is to reserve an IP address per host application For example clients wanting to connect to TSO specify an IP address that will be defined with PUs that have LOGAPPL TSO Example The following sequence of commands define three PUs Two of the PUs share the same IP address and the third PU has a separate IP address pu pO 05D99001 192 195 80 40 pu pl 05D99002 192 195 80 40 pu p2 05D99003 192 195 80 41 TN3270 Server Commands 35 show extended channel tn3270 server show extended channel tn3270 server Use the show extended channel tn3270 server privileged EXEC command to display current server configuration parameters and the status of the PUs defined in each TN3270 server show extended channel s ot 2 tn3270 server Syntax Description slotl2 Specifies a particular CIP in the router where slot is the slot number The port value for a TN3270 server is always 2 Command Mode Privileged EXEC Sample Display The following is sample output on the Cisco 7000 from the show extended channel tn3270 server command router show extended channel 3 2 tn3270 server lt current stats gt lt c
57. r Commands pu direct lu seed lu name stem Optional Provides an LU name that the client can use when a specific LU name request is needed The format can be x or x x where x x is an alphanumeric string When is specified it is replaced with the LU LOCADDR in hexadecimal digits to form the complete LU name When is specified decimal digits are used padded with leading zeroes to make three characters The first x must be alphabetic and the entire string including the symbols must not exceed 8 characters Defaults No PU is defined The default remote SAP address is 04 hexadecimal Command Mode TN3270 configuration Usage Guidelines If the PU is already created the pu pu name command with no arguments puts you in PU configuration mode where you can modify an existing PU entity The pu direct command uses values that are defined in two other commands the lan internal LAN configuration command and the adapter internal LAN configuration command The lan type and adapter adapter number values configured on the CIP internal LAN interface are used in the pu command For a link via a channel on this CIP the TN3270 server and the hosts should open different adapters in the same internal LAN Using different adapters avoids any contention for SAP numbers and is also necessary if you configure duplicate MAC addresses for fallback CSNA access to the host By configuring the adapters in the same internal LAN
58. r countries All other trademarks mentioned in this document are the property of their respective owners Copyright 1998 Cisco Systems Inc All rights reserved Printed in USA 9802R 58 1TN3270 Server Commands
59. r gt Prompt tn3270 dlur gt Prompt tn3270 dlur lsap gt Prompts tn3270 pu gt tn3270 dlur gt Use TN3270 PU configuration mode when the TN3270 server is attached to a non APPN host Use TN3270 DLUR PU configuration mode when the TN3270 server is attached to an APPN host 4736 Configuring TN3270 Server on the Channel Interface Processor 11 TN3270 Configuration Modes DLUR SAP Configuration Mode From DLUR server configuration mode Isap command puts you in DLUR SAP configuration mode Prompt tn3270 dlur lsap gt PU Configuration Mode There are two paths to PU configuration mode from the TN3270 server configuration mode or from the DLUR configuration mode In either mode the pu command puts you in PU configuration mode From TN3270 configuration mode the pu command to create a new PU is pu pu name idblk idnum ip address type adapno lsap rmac rmac rsap rsap lu seed lu name stem From DLUR configuration mode the pu command to create a new PU is pu pu name idblk idnum ip address From either mode to return to PU configuration mode on PU pu name the command is pu pu name Prompts tn3270 pu gt tn3270 dlur pu gt Commands Allowed in Multiple Modes The following commands are valid in TN3270 configuration mode or in either variation of PU configuration mode no tep port port number no idle time seconds no keepalive seconds no unbind action keep disconnect no
60. racters long for example RA12 NODM1PP The portion of the name before the period is the NETID and is shared between entities in the same logical network Example The following command sets a VRN name for the TN3270 internal adapter on the CIP vrn SYD BLAN25 Related Commands adapter lan 56 1TN3270 Server Commands Cisco Connection Online Cisco Connection Online Cisco Connection Online CCO is Cisco Systems primary real time support channel Maintenance customers and partners can self register on CCO to obtain additional information and services Available 24 hours a day 7 days a week CCO provides a wealth of standard and value added services to Cisco s customers and business partners CCO services include product information product documentation software updates release notes technical tips the Bug Navigator configuration notes brochures descriptions of service offerings and download access to public and authorized files CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously a character based version and a multimedia version that resides on the World Wide Web WWW The character based CCO supports Zmodem Kermit Xmodem FTP and Internet e mail and it is excellent for quick access to information over lower bandwidths The WWW version of CCO provides richly formatted documents with photographs figures graphics and video as well as hyperlinks to related inf
61. red generic pool for LUs on this PU BYTES IN OUT Total number of bytes sent to received from the host for this PU number number FRAMES IN OUT Total number of frames sent to received from the host for this PU number number NEGRSP IN OUT Total number of SNA negative responses sent to received from the number number host ACTLUS number Total number of ACTLUs received from the host DACTLUS number Total number of DACTLUs received from the host BINDS number Total number of BINDs received from the host LU number LOCADDR of the LU NAME lu name Name of the TN3270 LU 46 1TN3270 Server Commands show extended channel tn3270 server pu Table 9 Show tn3270 server pu Field Descriptions Continued Field Description CLIENT IP TCP Client s IP address and TCP port number ip addr tcpport STATE lu state The LU states and their meanings are e e unknown LU is in an undefined state inactive LU did not receive ACTLU active LU received ACTLU and acknowledged positively p sdt LU is bound but there is no SDT yet act sess LU is bound and in session p actlu Telnet connects and is awaiting ACTLU p ntf av Awaiting host notify available response p ntf ua Awaiting host notify unavailable response p reset Waiting for a buffer to send DACTLU response p psid Waiting for NMVT Reply psid response p bind Waiting for host to send bind p unbind Awaiting host
62. scription type Internal adapter type on the CIP card which corresponds to the value specified in the lan internal LAN configuration command The currently supported type is token adapter adapter number Internal adapter interface on the CIP card which is the same value specified in the adapter internal LAN configuration command sap Optional Local SAP number 04 to FC in hexadecimal The value must be even and should normally be a multiple of 4 It must be unique within the internal adapter in that no other 802 2 clients of that adapter in the router or in a host should be allocated the same SAP The default value is CO Default The default value for sap is hexadecimal CO Command Mode DLUR configuration Usage Guidelines If the SAP in the SNA session switch function is already created the Isap command with no arguments puts you in DLUR SAP configuration mode The Isap command can be entered only in DLUR configuration mode The Isap command uses values that are defined in two other commands the lan internal LAN configuration command and the adapter internal LAN configuration command The lan type and adapter adapter number values configured on the CIP internal LAN interface are used in the Isap command However the lan type keyword is a little different Where the type on the lan command is tokenring the corresponding type on Isap is token adapter This emphasizes that the number that follows is an adapter number not
63. t external gateway solutions can support only 1000 to 2000 sessions The TN3270 server offers the following capabilities Load Balancing and Redundancy Provides effective CIP resource utilization and more consistent response times This feature is initially provided by means of an external prototype implementation End to End Session Visibility Provides enhanced resource management Systems Network Architecture SNA Session Switching Off loads VTAM by providing session routing TN3270E Support In combination with a TN3270E client provides advanced SNA management and SNA functionality including printer support Dynamic Definition of Dependent Logical Units LU Provides simplified configuration and network definition at the router and in VTAM Dynamic Allocation of LUs Makes efficient use of LU pool resources while supporting multiple SNA model types TN3270 server requires 32 MB of CIP dynamic RAM to support up to 4000 sessions 64 MB to support 8000 sessions and 128 MB to support 16000 sessions CIP2 only TN3270 server can run concurrently with any of the other CIP applications IP Datagram TCP IP Offload or CIP SNA CSNA but operation of any of these features will affect the total number of sessions supported because of contention for CIP processor cycles Update to Configuration Guide The information that follows is an update to the Router Products Configuration Guide Chapters 23 to 33 Add
64. tax Description seconds Number of seconds from 0 to 65535 A value of 0 means the session is never disconnected Defaults The default in TN3270 configuration mode is that the session is never disconnected 0 The default in PU configuration mode is the value currently configured in TN3270 configuration mode Command Modes TN3270 configuration PU configuration Usage Guidelines The idle time command can be entered in either TN3270 configuration mode or PU configuration mode A value entered in TN3270 mode applies to all PUs for that TN3270 server except as overridden by values entered in PU configuration mode A no idle time command entered in PU configuration mode will restore the idle time value entered in TN3270 command mode The idle time command affects currently active and future TN3270 sessions For example if the idle time value is reduced from 900 seconds to 600 seconds sessions that have been idle for between 600 and 900 seconds are immediately disconnected Note For the purposes of idle time logic TIMING MARKs generated by the keepalive logic do not constitute activity Examples The following command sets an idle time disconnect value of 10 minutes idle time 600 The following command entered in TN3270 configuration mode sets the default idle time disconnect value to 0 or never disconnect no idle time 24 1TN3270 Server Commands keepalive keepalive Use the keepalive TN3270 configur
65. the host The value must be unique within the domain however the TN3270 Server cannot tell which remote hosts are in which domains and does not enforce the unique value requirement ip address IP address that the clients should use as host IP address to map to LU sessions under this PU type Internal adapter type on the CIP card which corresponds to the value specified in the lan internal LAN configuration command The currently supported type is token adapter adapter number Internal adapter interface on the CIP card which is the same value specified in the adapter internal LAN configuration command lsap Local SAP number in hexadecimal ranging from 04 to FC The value must be even and must be unique within the internal adapter so that no other 802 2 clients of that adapter in the router or in a host should be allocated the same SAP Other direct links from TN3270 server direct PUs may use the same value on the internal adapter as long as the remote MAC or SAP is different rmac rmac Optional Remote MAC address The remote MAC address of the form xxxx xxxx xxxx hexadecimal specifying the MAC address of the remote host If not specified a loopback link to another SAP on the same internal LAN adapter is assumed rsap rsap Optional Remote SAP address The remote SAP address is a one or two character hexadecimal string ranging from 04 to FC specifying the SAP address of the remote host The default is 04 32 TN3270 Serve
66. tion of rmac and rsap must be unique within the DLUR SAP function These values can only be changed by deleting the link definition using the no link command and recreating the link definition For a link via a channel on this CIP the TN3270 server and the hosts should open different adapters in the same internal LAN Using different adapters avoids any contention for SAP numbers and is also necessary if you configure duplicate MAC addresses for fallback CSNA access to the host By configuring the adapters in the same internal LAN you achieve the same performance bypassing the DLC stacks as looping back on a single adapter Examples The following command defines a link name and a remote SAP address link LINK5 rsap 08 26 1TN3270 Server Commands link The following example shows different adapter numbers configured on the same internal LAN to avoid SAP contention The host uses SAP 4 on token ring adapter 0 lan tokenring 0 adapter 0 4000 0000 0001 adapter 1 4000 0000 0002 tn3270 server dlur lsap token adapter 1 link HOST rmac 4000 0000 0001 rsap 4 TN3270 Server Commands 27 Isap Isap Use the Isap DLUR configuration command to create a SAP in the SNA session switch or to enter DLUR SAP configuration mode Use the no form of this command to delete a SAP and all SNA session switch links using the internal LAN interface Isap Isap type adapter number Isap no Isap type adapter number lsap Syntax De
67. ucts including VTAM the characters pound at and dollar are allowed in the fully qualified name strings Each string is from one to eight characters long for example RA12 NODM1PP The portion of the name before the period is the NETID and is shared between entities in the same logical network When no preferred server is specified the DLUR will request NN server support from the first suitable node with which it makes contact If refused it will try the next one and so on If a preferred server is specified then DLUR will wait a short time to allow a link to the preferred server to materialize If the preferred server is not found in that time any suitable node can be used as above DLUR will not relinquish the current NN server merely because the preferred server becomes available Example The following command selects SYD VMX as the preferred NN server preferred nnserver SYD VMX TN3270 Server Commands 31 pu direct pu direct Use the pu TN3270 configuration command to create a PU entity that has its own direct link to a host or to enter PU configuration mode Use the no form of this command to remove the PU entity pu pu name pu pu name idblk idnum ip address type adapter number lsap rmac rmac rsap rsap lu seed lu name stem no pu pu name Syntax Description pu name Name that uniquely identifies this PU idblk idnum This value must match the IDBLK IDNUM value defined at
68. unbind response wt unbnd Waiting for client to acknowledge disconnection wt sdt Waiting for client to acknowledge SDT MODEL model 3278 model type of client FRAMES IN number Number of frames sent to the host FRAMES OUT number Number of frames sent out from the host IDLE FOR time Time the client has been idle The time is in HH MM SS TN3270 Server Commands 47 show extended channel tn3270 server pu lu show extended channel tn3270 server pu lu Use the show extended channel tn3270 server pu lu privileged EXEC command to display information about the TN3270 server LUs running on CIP interface in a Cisco 7000 series show extended channel s ot 2 tn3270 server pu pu name lu locaddr history Syntax Description slotl2 Specifies a particular CIP in the router where slot is the slot number The port value for a TN3270 server will always be 2 pu name PU name that uniquely identifies this PU locaddr LU LOCADDR that uniquely identifies the LU history Optional Displays the LU trace history Command Mode Privileged EXEC Sample Displays The following is sample output on the Cisco 7000 from the show extended channel tn3270 server pu lu command for a direct PU router show extended channel 3 2 tn3270 pu ext2 lu 3 lu name client ip tcp state model frames in out 3 EXT2003 171 69 176 77 3829 ACTIVE 327902E 8 9 pu is EXT2 lu is DYNAMIC type 0 negotiated TN3270 bytes 203 in 2954 out RuSize 0 in
69. ur host system under the descriptions for LUGROUP for additional information DDDLWU dynamically requests LUs using the terminal type provided by TN3270 clients The dynamic request eliminates the need to define any LU configuration in the server to support TN3270 clients emulating a generic TN3270 terminal To support DDDLU the PUs used by the TN3270 server have to be defined in VTAM with LUSEED and LUGROUP parameters as shown in Figure 2 8 Configuring TN3270 Server on the Channel Interface Processor VTAM Host Configuration Considerations for Dynamic LU Allocation Figure 2 VTAM Host Values Defining LUSEED and LUGROUP Example VTAM host values defining LUSEED and LUGROUP name parameters TN3270PU TN3X1100 TN3X1101 PU LU LU define other PU parameters IDBLK 05D IDNUM 30001 LUSEED TN3X1 define the seed component of the LU names created by DDDLU e g LOCADDR 42 will have the name TN3X1042 LUGROUP AGROUP x define the LU group name LOCADDR 100 define a terminal which requires a MODETAB AMODETAB specific LU name LOCADDR 101 define a printer which requires a specific DLOGMODE M3287CS LU name Example VTAM host values defining LUGROUPname AGROUP AGROUP 327802E 3278S2E 327805 LU LU LU LUGROUP a define LU group to support various terminal types USSTAB USSXXX i define template to support IBM 3278 LOGAPPL TPXP001 terminal model 2 with Extended Data DLO

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