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Cisco Systems 8510 CSR Network Router User Manual

1. You can create multiple map lists An interface can have only one map list associated with it but a map list can be associated with multiple interfaces In the following example PVC 5 is created on ATM interface 1 0 0 by means of LLC sNAP encapsulation over AALS ATM interface 1 0 0 IP address 1 1 1 1 connects with the ATM interface IP address 1 1 1 5 at the other end over VC 5 Router config interface atm 1 0 0 Router config if ip address 1 1 1 1 255 255 255 0 Router config if atm pve 5 0 10 aal5snap Router config if map group atm Router config if exit Router config map list atm Router config map list 1 1 1 5 atm vc 5 broadcast I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide 5 Chapter4 Configuring Interfaces WE Configuring the ATM Uplink Interface Catalyst 8540 SVC Example Router config Router config Router config Router config Router config Router config Router config Router config Router Router config Router config Router config Router config Router config Router config Router config In the following example two switch routers with Layer 3 enabled ATM interfaces are connected by means of SVCs For SVCs the map list associates each IP addresses with an ATM NSAP format address rather than with a specific VC This configuration could also be used to
2. section on page 4 5 Layer 3 Switching Software Feature and Configuration Guide 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the POS OC 12c Uplink Interface Catalyst 8540 E Default Configuration Table 4 1 shows the default configuration of an enabled POS OC 12c uplink interface To change any of these values see the instructions in the following sections Initially Configuring the POS Interface and Customizing the Configuration Table 4 1 POS OC 12c Uplink Interface Default Configuration Values Parameter Configuration Command Default Value Keepalive no keepalive seconds Keepalives enabled 10 seconds Encapsulation encapsulation hdlc ppp HDLC Cisco Discovery Protocol CDP no cdp enable CDP enabled Maximum transmission unit no mtu bytes 4470 bytes MTU Framing pos framing sdh sonet SONET OC 12c Bandwidth no bandwidth kbps 622000 kbps not configurable SONET overhead pos flag c2 value j0 value c2 path signal byte set to Oxcf s1s0 value jO section trace byte set to Oxcc sls0 bit s1 and sO of H1 set to 0 Loop internal no loopback internal line No loopback POS SPE scrambling no pos scramble atm POS SPE scrambling enabled Cyclic redundancy check ere 16 32 32 Clock source clock source internal line Line Initially Configuring the POS Interface You should configure the followi
3. 25 PSBF 1 State PSBF_state False Rx K1 K2 00 00 Tx K1 K2 00 00 S1SO 00 C2 0x16 PATH TRACE BUFFER STABLE Remote hostname acl traffic Remote interface P0S9 0 0 Remote IP addr 0 0 0 0 Remote Rx K1 K2 00 00 Tx K1 K2 00 00 61 63 6C 2D 74 72 61 66 66 69 63 00 00 00 00 00 acl tratftic 00 00 2F 30 00 00 00 00 50 4F 53 39 2F 30 2F 30 0 POS9 0 0 00 00 00 00 00 00 30 2E 30 2E 30 2E 30 00 00 00 020 00 e lt 00 00 00 00 00 00 30 30 30 30 30 30 30 30 OD 0A 00000000 BER thresholds SF TCA thresholds B1 10e 3 SD 10e 6 10e 6 B2 10e 6 B3 10e 6 Clock source Configured line Current line Last valid pointer from H1 H2 0x20A Bl set 564 clr 124 ber 0 err 0 lk lt leps 0 0 lk_eps 95 dly 0 set 1 clr 0 AO Rd 0 R1 D1 B2 set 564 clr 124 ber 0 err 0 lk lt leps 0 0 lk_eps 0 dly 0 set 1 clr 0 A 0 Rd 0 R1 D1 B3 set 564 clr 124 ber 0 err 0 lk lt leps 0 0 lk_eps 50 dly 0 set 1 clr 0 AO Rd 0 R1 D1 otal number of port interrupts 33 Se POS module IO registers Starting address 0xBC280000 FPGA Revision 0x0001 Reset Register 0x0003 Tx Rx LED Register 0x0000 Alarm LED Register 0x0000 CD LED Register 0x0000 PLL Control Register 0x0003 Tx Clock Config Register 0x0000 Layer 3 Switching Software Feature and Configuration Guide 78 6235 04 Cisco 10S Release 12 0 10 W 5 18 425 Chapter4 Configuring Interfaces HI C
4. Table 4 4 ATM Uplink Interface Default Configuration Values continued Parameter Configuration Command Default Value Transmit clock source no atm clock internal no internal line Cisco Discovery Protocol CDP no cdp enable CDP enabled ATM VCs per VP atm vc per vp 1024 In addition the ATM uplink interface uses the non configurable values shown in Table 4 5 Table 4 5 ATM Uplink Interface Nonconfigurable Values Parameter Value Transmit buffers for segmentation andreassembly 8192 SAR Receive buffers for SAR 8192 Maximum VCs 8192 ATM AAL AALS ILMI keepalives Not supported Initially Configuring the ATM Uplink Interface You should configure the following properties for a newly installed ATM uplink interface Step 1 Step 2 Step 3 Step 4 Step 5 IP routing IP address To initially configure the ATM uplink interface perform the following steps beginning in global configuration mode Command Purpose Router config ip routing Enables IP routing Router config interface atm Slot subslot interface Router config if interface to configure Enters interface configuration mode and specifies the ATM Router config if ip address ip address subnet mask Assigns an IP address and subnet mask to the interface Router config if atm clock internal Specifies the internal clock for the interface The default m
5. 96 LINE AIS 0 RDI 1 FEBE 265 BIP B2 1170 PATH AIS 0 RDI 1 FEBE 78 BIP B3 51 LOP 1 PLM P 1 UNEQ P 0 Active Alarms None Active Defects None Alarm reporting enabled for SF SLOS SLOF B1 TCA B2 TCA PLOP B3 TCA Framing SONET APS COAPS 25 PSBF 1 State PSBF_state False Rx K1 K2 00 00 Tx K1 K2 00 00 S1S0 00 C2 0x16 PATH TRACE BUFFER UNSTABLE Remote hostname acl traffi0 Remote interface P0S9 0 0 Remote IP addr 0 0 0 0 Remote Rx K1 K2 00 00 Tx K1 K2 00 00 BER thresholds SF TCA thresholds Bl 10e 3 SD 10e 6 B2 10e 6 10e 6 B3 10e 6 Clock source Configured line Current line Last valid pointer from H1 H2 0x20A Layer 3 Switching Software Feature and Configuration Guide 424 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the POS OC 12c Uplink Interface Catalyst 8540 W The following example shows output for the show controllers pos command with the detail option Router show controller pos 2 0 0 detail Interface POS2 0 0 Hardware is Packet Over SONET One port OC12 Single Mode Intermediate Reach POS2 0 0 SECTION LOF 1 LOS 0 BIP B1 96 LINE AIS 0 RDI 1 FEBE 265 BIP B2 1170 PATH AIS 0 RDI 1 FEBE 78 BIP B3 51 LOP 1 PLM P 1 UNEQ P 0 Active Alarms None Active Defects None Alarm reporting enabled for SF SLOS SLOF B1 TCA B2 TCA PLOP B3 TCA Framing SONET APS COAPS
6. Step 4 Step 5 Step 6 Use the following procedure to assign an IP address to the Fast Ethernet 10BaseT or 100BaseT interface of your switch router so that it can be recognized as a device on the Ethernet LAN The Fast Ethernet interface supports 10 Mbps and 100 Mbps speeds with Cisco 10BaseT and 100BaseT routers hubs switches and switch routers Command Description Router config interface fastethernet Enters Ethernet interface configuration mode to Slot subslot interface configure the Fast Ethernet interfaces Router config if Router config if ip address ip address Specifies the IP address and IP subnet mask to be subnet mask assigned to the FastEthernet interface Router config if no speed 10 100 auto Configures the transmission speed for 10 or 100 Mbps or for autonegotiation the default If you set the speed to auto you enable autonegotiation and the switch router matches the speed of the partner node Router config if no duplex full half auto Configures for full or half duplex If you set duplex for auto the switch router matches the duplex setting of the partner node Router config if end Returns to privileged EXEC mode Router Router copy system running config Saves your configuration changes to NVRAM nvram startup config Example The following example demonstrates initially configuring a Fast Ethernet interface with an IP address and autonegotiated speed
7. Enables the interface with the previous configurations Example The following configuration is an example of the tasks in the preceding table Router config interface pos 1 0 0 Router config if ip address 10 1 2 3 255 0 0 0 Router config if encapsulation ppp Router config if clock source line Router config if no shutdown Automatic Reverting of Clock Source If your system clock source is set to line clock it uses the recovered received clock to transmit Under some conditions the received clock is not reliable because of severe degradation of the signal quality Because your system software monitors SF signal failure it knows when there is severe degradation in the signal quality and resorts to using the internal clock temporarily Once the conditions that caused the signal quality to deteriorate clear your system reverts to the line clock When two POS interface modules are connected and configured with the default line clock the signal quality can degrade over time and both POS interfaces revert to the internal clock As soon as the signal quality improves both POS interfaces revert to using the line clock This cycle repeats itself causing the line protocol on both interfaces to toggle You can prevent this situation by configuring one end of the connection with the default line clock and the other with the internal clock In addition degradation in the signal quality causes an automatic reverting of the clock
8. Enters interface configuration mode and specifies the ATM interface to configure Router config if atm pve vcd vpi vci aal encap Configures the PVC with VCD value associated with a VPI VCI pair and specifies an encapsulation type The atm pvc command allows you to specify additional optional parameters for the connection including peak average and burst transmission rate and the frequency for generating OAM cells Mapping a Protocol Address to a PVC PVC Example Step 1 Step 2 Step 3 Step 4 Step 5 Cisco IOS supports a mapping scheme that allows you to associate a protocol address with a VCD for PVCs or with an ATM NSAP address for SVCs To create a mapping you first create a map list then associate the map list to an interface To map a protocol address to a PVC perform the following steps beginning in global configuration mode Command Purpose Router config map list name Creates a map list and assigns it a name Router config map list ip ip address atm ve vcd Creates one or more map list entries associating a protocol address with a VCD Router config map list exit Router config Exits map list configuration mode Router config interface atm slot subslot interface Router config if Enters interface configuration mode and specifies the ATM interface to configure Router config if map group name Associates the map list with the interface
9. encapsulation Fast Ethernet port 3 0 1 and subinterface 1 0 1 2 are in bridge group 2 They are part of VLAN 100 which uses 802 1Q encapsulation Fast Ethernet port 1 0 1 is configured as an 802 1Q trunk Layer 3 Switching Software Feature and Configuration Guide Pal E 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter 4 Configuring Interfaces Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Configuring 802 1Q VLAN Encapsulation W Figure 4 3 Example of Bridging Between Native and Non Native 802 1Q VLANs Bridge group 1 1 0 1 1 1 0 0 Native VLAN 1 E encap dotiq 1 native Campus encap dotiq 100 switch router 3 0 1 Bridge group 2 1 0 1 2 ey eed VLAN 100 Campus switch router 28089 To configure the bridging between native VLAN 1 and non native VLAN 100 depicted in Figure 4 3 perform the following steps Command Purpose Router config interface fastethernet slot subslot interface subinterface Enters subinterface configuration mode Router config subif encap dotlq vian id native Specifies 802 1Q encapsulation for Ethernet frames sent from the subinterface with a header that maintains the specified native VLAN ID between network nodes Router config subif bridge group bridge group Assigns the subinterface a bridge group number D Note When you are configuring VLAN routing skip this step Router conf
10. follows slos lais line alarm indication signal pais path alarm indication signal plop path loss of pointer prdi path remote defect indication slof section loss of frame slos section loss of signal The slof and slos errors are reported by default Step3 Router config if pos delay Delays triggering the line protocol of the interface from going triggers line path millisecond down Delay can be set from 50 to 10000 ms If no time intervals are specified the default delay is set to 100 ms Verifying the POS Configuration To verify the configuration of the POS OC 12c uplink interface use the following commands Command Purpose show interfaces pos slot subslot interface Displays detailed information about the POS interface show protocols pos slot subslot interface Displays status information for the active network protocols show controllers pos slot subslot interface Displays clock source SONET alarms and error rates and register values to assist in troubleshooting Layer 3 Switching Software Feature and Configuration Guide 422 78 6235 04 Cisco IOS Release 12 0 10 W5 18 _ Chapter 4 Configuring Interfaces Configuring the POS OC 12c Uplink Interface Catalyst 8540 Examples The following example shows output for the show interfaces pos command Router show interfaces pos 1 0 0 POS1 0 0 is up line protocol is down Hardware is Packet Over SONET Inter
11. input 0 bytes 0 no buffer Received 0 broadcasts 0 runts 0 giants 0 throttles O input errors 0 CRC 0 frame 0 overrun 0 ignored 0 abort 8 packets output 2736 bytes 0 underruns 0 output errors 0 collisions 0 interface resets 0 output buffer failures 0 output buffers swapped out Example The following example shows sample output for the show controllers atm command Router show controllers atm 0 0 0 slot 0 0 Controller Type XPIF ATM OC3 PM 1 Port SM_IR 0000 chan0 chanl chan2 chan3 sstr 1200 tasko 11 1I II TI task1 5CB 5CB 5CB 5CB task2 ri TE TL TE task3 5CB 5CB 5CB 5CB SMDR OxFF78 SSTR 0x1200 SSMR 0x4002 EVER 0x3001 SIMR 0x0000 MBXW 0x0000 MBXR 0x0000 SPER 0xF000 TX SAR Beta 2 1 2 is Operational RX SAR Beta 2 1 2 is Operational SAR Counters tx_paks 5 tx_abort_paks 0 tx_idle_cells 48482684 rx_paks 5 rx drop paks 0 rx_discard_cells 0 Xpif Counters MR 580 MR2 0 MR3 5 MR4 0 MRS 0 MR6 0 MR7 0 MR8 0 MRO 0 MR10 0 MR11 0 MR12 0 MR13 5 MR14 0 MR15 0 MR16 0 MR17 0 MR18 0 MR19 0 MR20 0 MR21 0 SR 2500 SR2 598 SR3 0 SR4 0 SRS 0 MT 560 MT2 0 MT3 5 MT4 0 MTS 0 MT6 0 MT7 0 MT8 0 MT9 0 ST 0 ST2 0 MRXS 131188 MTXS 112 SRXS 3 STXS 0 I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Software Feature and Configuration Guide m Chapter 4 Configuring Interfaces HI About Port Snooping Interface Configuration Mode ATM clock line STS 3c k1 k2 0 0 c2 0x13 Active Def
12. interface to the bridge group Router config if exit Router config Returns to global configuration mode Router config bridge bridge group protocol ieee Specifies that the bridge group will use the IEEE Ethernet Spanning Tree Protocol I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide 7 Chapter4 Configuring Interfaces E Configuring 802 19 VLAN Encapsulation Example The following example shows how to configure the interfaces for VLAN bridging with ISL encapsulation shown in Figure 4 2 Router config interface fastethernet 1 0 1 1 Router config subif encap isl 50 Router config subif bridge group 1 Router config subif interface fastethernet 1 0 0 Router config if bridge group 1 Router config if exit Router config bridge 1 protocol ieee Router config interface fastethernet 1 0 1 2 Router config subif encap isl 100 Router config subif bridge group 2 Router config subif interface fastethernet 3 0 1 Router config subif bridge group 2 Router config subif exit Router config bridge 2 protocol ieee Router config exit Router copy system running config nvram startup config When configuring ISL with IP you cannot configure IP addresses on a subinterface unless the VLANs are already configured that is you must have already entered the encapsulation isl or encapsulation dotlq comman
13. show atm ve vcd Displays current information about VCs and traffic You can specify a VCD to display information about show atm traffic Displays information about global traffic to and from all ATM networks connected to the switch router show controllers atm Displays clock source SONET alarms and error rates and register values to assist in troubleshooting Layer 3 Switching Softw are Feature and Configuration Guide 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 l _ Chapter 4 Configuring Interfaces Configuring the ATM Uplink Interface Catalyst 8540 Example The following example shows sample output for the show interfaces atm command Router show interfaces atm 0 0 0 ATM0 0 0 is down line protocol is down Hardware is epif_port_garfield address is 0090 2157 c407 bia 0090 2157 c407 MTU 4470 bytes sub MTU 4470 BW 155000 Kbit DLY 10 usec rely 0 255 load 1 255 Encapsulation ATM loopback not set keepalive not supported Full duplex Unknown Speed ARP type ARPA ARP Timeout 04 00 00 Encapsulation s AAL5 AAL3 4 PVC mode 8191 maximum active VCs 1024 VCs per VP 0 current VCCs VC idle disconnect time 300 seconds Last input never output never output hang never Last clearing of show interface counters never Queueing strategy fifo Output queue 0 40 0 drops input queue 0 75 0 drops 5 minute input rate 0 bits sec 0 packets sec 5 minute output rate 0 bits sec 0 packets sec 0 packets
14. source under the following conditions e SLOS section loss of signal SLOF section loss of frame AIS L line alarm indication signal SF signal failure due to B2 error rate crossing the SF threshold value SF signal failure due to B3 error rate crossing the SF threshold value when the pos delay triggers path command is configured Layer 3 Switching Software Feature and Configuration Guide Pais 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Additional Configurations Step 1 Step 2 Step 3 S Note Configuring the POS OC 12c Uplink Interface Catalyst 8540 E To configure additional properties to match those of the interface at the far end perform the following steps beginning in global configuration mode Command Purpose Router config if no keepalive Turns off keepalive messages Keepalive messages though not required are recommended Router config if no cdp enable Turns off CDP which is not required Router config if ere 16 32 Sets the CRC value If the device to which the POS module is connected does not support the default CRC value of 32 set both devices to use a value of 16 The above steps apply both to the POS OC 12c uplink interface on the switch router and to the interface to which it connects at the far end Customizing the Configuration This section describe how to customize the configuration of the P
15. synchronous scrambler of polynomial X 43 1 to the synchronous payload envelope SPE of the interface to ensure sufficient bit transition density Both ends of the connection must use the same scrambling algorithm To configure POS SPE scrambling perform the following steps beginning in global configuration mode Command Purpose Step1 Router config interface pos Enters interface configuration mode and specifies the POS Slot subslot interface interface to configure Router config if Step2 Router config if no pos Disables payload scrambling on the interface Payload scramble atm scrambling is on by default Step3 Router config if no shutdown Enables the interface with the previous configuration Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 a 419 Chapter4 Configuring Interfaces HI Configuring the POS OC 12c Uplink Interface Catalyst 8540 Configuring SONET Alarms The OC 12c POS uplink interface supports SONET alarm monitoring To configure alarm monitoring perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface pos Enters interface configuration mode and specifies the POS Slot subslot interface interface to configure Router config if Step2 Router config if pos report Permits console logging of selected SONET alarms b1 tca b2 tca b3 tca lais Irdi pa
16. the switch router and a remote system A virtual circuit is established for each ATM end node with which the router communicates The characteristics of the virtual circuit are established when the virtual circuit is created and include the following Virtual circuit descriptor VCD associated with a VPI VCI paid Encapsulation type e Peak average and burst transmission rates To configure a PVC you must complete the following tasks Create a PVC e Map a protocol address to a PVC When you create a PVC you specify a virtual circuit descriptor VCD and associate it with the VPI VCI pair The number chosen from the VCD is independent of the VPI VCI used When you create a PVC you also specify the AAL and encapsulation type and traffic parameters Traffic parameters include peak and average rate specified in kilobits per second and burst rate specified in cells Omitting a peak and average value causes the PVC to be connected at the highest bandwidth rate available In that case the peak and average values are equal Layer 3 Switching Software Feature and Configuration Guide 434 78 6235 04 Cisco IOS Release 12 0 10 W5 18 _ Chapter 4 Configuring Interfaces Step 1 Step 2 Configuring the ATM Uplink Interface Catalyst 8540 Ti To create a PVC perform the following steps beginning in global configuration mode Command Purpose Router config interface atm Slot subslot interface Router config if
17. CHAPTER Configuring Interfaces This chapter describes basic interface configurations for your Layer 3 switch router Also included are sections about configuring virtual LANs VLANs packet over SONET interfaces ATM uplink interfaces and port snooping Unless otherwise noted the information in this chapter applies to the Catalyst 8540 CSR Catalyst 8510 CSR and Catalyst 8540 MSR with Layer 3 functionality For further information about the commands used in this chapter refer to the command reference publications in the Cisco IOS documentation set and to Appendix A Command Reference This chapter includes the following sections Overview of Interface Configuration General Instructions for Configuring Interfaces About Layer 3 Switching Interfaces About Virtual LANs Configuring ISL VLAN Encapsulation Configuring 802 1Q VLAN Encapsulation About Packet over SONET Catalyst 8540 Configuring the POS OC 12c Uplink Interface Catalyst 8540 About ATM Uplinks Catalyst 8540 e Configuring the ATM Uplink Interface Catalyst 8540 About Port Snooping Configuring Snooping Note You are at Step 3 in the suggested process for configuring your switch router see the Suggested Procedure for Configuring Your Switch Router section on page 2 1 You should have already configured the processor module and LAN emulation on the Catalyst 8540 MSR and now be ready to proceed with configuring interfaces L
18. Ka 78 6235 04 Cisco IOS Release 12 0 10 W5 18
19. MR13 0 MR14 1155 MR15 0 MR16 0 MR17 0 MR18 104 MR19 0 MR20 0 MR21 0 Layer 3 Switching Software Feature and Configuration Guide P4226 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces About ATM Uplinks Catalyst 8540 i SR1 72036 SR2 18806 SR3 0 SR4 0 SR5 0 MT1 15143 MT2 0 MT3 0 MT4 0 MT5 6 MT6 0 MT7 0 MT8 0 MTY 0 STi 0 ST2 0 MRXS 262160 MTXS 16 SRXS 3 STXS 0 About ATM Uplinks Catalyst 8540 ATM uses cell switching and multiplexing technology that combines the benefits of circuit switching constant transmission delay and guaranteed capacity with those of packet switching flexibility and efficiency for intermittent traffic ATM is a common network technology for enterprise backbones MANs and WANs By using an ATM uplink Layer 3 traffic can be routed over an ATM network The ATM uplink facilitates this by segmenting packet data into fixed size cells at the transmitting end and reassembling them into packets at the receiving end This conversion process is defined by the ATM adaptation layer AAL For further information about ATM and its implementation on the Catalyst 8540 MSR and Catalyst 8510 MSR refer to the Guide to ATM Technology About the ATM Uplink Interface The ATM uplink interface allows the Catalyst 8540 switch router to be deployed as part of an existing network where a router with an ATM interface would otherwise have been utilized Additionally the ATM uplink interface allo
20. OS OC 12c uplink interface to match your network environment Setting the MTU Size Step 1 Step 2 To set the maximum transmission unit MTU perform the following steps beginning in global configuration mode Command Purpose Router config interface pos Slot subslot interface Router config if Enters interface configuration mode and specifies the POS interface to configure Router config if mtu bytes Configures the MTU size up to a maximum of 9188 bytes Default MTU size is 4470 bytes Note The POS OC 12c uplink interface supports IP unicast and IP multicast fragmentation For IP unicast fragmentation the packet must ingress on a POS interface and egress on any interface For IP multicast fragmentation IP multicast data packets greater than 1500 bytes are fragmented to 1500 bytes on the ingress POS interface before being switched to other members in the multicast group All the members in the multicast group must have a MTU equal to or greater than 1500 bytes I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide Chapter4 Configuring Interfaces HI Configuring the POS OC 12c Uplink Interface Catalyst 8540 Configuring Framing The default framing mode for the POS OC 12c uplink interface is SONET STS 12c You can also configure the interface for SDH STM 4 which is more widely used in Europe To configure the framing
21. You can use the no form of this command to restore default values Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 BEEN Chapter4 Configuring Interfaces W Configuring the ATM Uplink Interface Catalyst 8540 To configure the SONET overhead perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface atm Enters interface configuration mode and specifies the ATM Slot subslot interface interface to configure Router config if Step2 Router config if sonet Configures the SONET overhead bytes c2 is a path signal label overhead c2 byte j0 bytes identifier jO is the section trace bytes j1 is the path trace bytes msg line j1 16byte exp msg and sls0 is part of the payload pointer byte line msg line 64byte exp msg line msg line sls0 bits Step3 Router config if no shutdown Enables the interface with the previous configuration Note On the ATM OC 3c interface you can configure the c2 byte and the s1s0 bits On the ATM OC 12c interface you can configure the c2 byte j0 byte j1 byte and the s1s0 bits The value of the c2 byte is determined as follows If the value of the c2 byte has not been explicitly configured with the sonet overhead command the SONET framer sends the ATM payload value of 0x13 If the value of the c2 byte has been explicitly configur
22. and duplex Router Router config interface fastethernet 1 0 0 config if ip address 10 1 2 4 255 0 0 0 config if speed auto Router config if duplex auto Router config if Z Router copy system running config nvram startup config Router Verifying the Ethernet Interface Configuration To verify the settings after you have configured Gigabit Ethernet or Ethernet 10 100 BaseT operation use the following commands Command Purpose show interface gigabitethernet Displays the status and global parameters of the slot subslot interface Gigabit Ethernet interface show interface fastethernet Displays the status and global parameters of the Slot subslot interface Fast Ethernet interface Layer 3 Switching Software Feature and Configuration Guide Mae E 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces About Layer 3 Switching Interfaces Ti Examples The following example shows sample output from the show interface gigabitethernet command Router show interface gigabitethernet 0 0 0 GigabitEthernet0 0 0 is administratively down line protocol is down Hardware is Kl Gigabit Port address is 00d0 bald 3207 bia 00d0 bald 3207 Internet address is 10 1 2 3 8 MTU 1500 bytes BW 1000000 Kbit DLY 10 usec rely 255 255 load 1 255 Encapsulation ARPA loopback not set keepalive set 10 sec Full duplex mode 1000Mb s Auto negotiation 1000BaseSX output flow control is unsupporte
23. are reestablished Router config if end Router Returns to privileged EXEC mode Router copy system running config nvram startup config Saves your configuration changes to NVRAM For additional information on port snooping commands refer to the Port Snooping Commands section on page A 1 mi Layer 3 Switching Softw are Feature and Configuration Guide 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 l Chapter4 Configuring Interfaces Monitoring Snooping W Monitoring Snooping To monitor the current snooping mode configuration and status use the following commands Command Purpose show snoop interface Displays whether the indicated destination port is in snooping destination port mode If so it indicates the source monitored port and the snooping direction show snoop Displays all the snoop sessions configured on the system show snoop vc interface Displays the list of virtual circuits that are being monitored by the destination port destination port Now that you have configured the interfaces on your switch router see Chapter 5 Configuring Networking Protocols for instructions on configuring network and routing protocols Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 2441 Chapter4 Configuring Interfaces WE Monitoring Snooping Layer 3 Switching Softw are Feature and Configuration Guide
24. ayer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 BEN Chapter4 Configuring Interfaces W Overview of Interface Configuration Overview of Interface Configuration A router s main function is to relay packets from one data link to another To do that the characteristics of the interfaces through which the packets are received and sent must be defined Interface characteristics include but are not limited to IP address address of the port data encapsulation method and media type Many features are enabled on a per interface basis Interface configuration mode contains commands that modify the interface operation for example of an Ethernet port When you issue the interface command you must define the interface type and number The following general guidelines apply to all physical and virtual interface configuration processes Each interface must be configured with an IP address and an IP subnet mask The virtual interfaces supported by Cisco switch routers include subinterfaces and IP tunnels A subinterface is a mechanism that allows a single physical interface to support multiple logical interfaces or networks that is several logical interfaces or networks can be associated with a single hardware interface Configuring multiple virtual interfaces or subinterfaces on a single physical interface allows greater flexibility and connectivity on the network Layer 3 in
25. connect two switch routers with ATM interfaces through an ATM cloud of other switches Switch Router A interface atm 1 0 0 if if ip address 192 192 192 1 25 255 255 0 atm pvc 1 0 5 qsaal atm pvc 2 0 16 ilmi atm esi address 111111111111 00 map group SVC exit map list SVC config map list ip 192 192 192 2 atm nsap BB 000000000000000000000000 222222222222 00 broadcast Switch Router B if PER If PAE f if Router config interface atm 1 0 0 ip address 192 192 192 2 25 255 255 0 atm pvc 1 0 5 qsaal atm pvc 2 0 16 ilmi atm esi address 222222222222 00 map group SVC exit Router config map list SVC map list ip 192 192 192 1 atm nsap BB 000000000000000000000000 111111111111 00 broadcast Note the following about this configuration The PVC with VPI VCI 0 5 must be configured for signaling to set up and tear down SVCs The PVC with VPI VCI 0 16 must be configured for switch management communication using ILMI The first 13 bytes of the ATM NSAP address is the prefix from the switch the next 6 bytes is the end system identifier ESI and must be unique The last byte is the selector byte and is used in making forwarding decisions Verifying the ATM Configuration To verify the configuration on the ATM uplink interface use the following commands Command Purpose show interfaces atm Displays current ATM specific information for the interface
26. cribed in the next section Verifying the POS Configuration section on page 4 22 For a detailed description of the pos report and pos threshold commands refer to the Cisco IOS Interface Command Reference publication Layer 3 Switching Software Feature and Configuration Guide 420 fl 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the POS OC 12c Uplink Interface Catalyst 8540 E Configuring SONET Delay Triggers A trigger is an alarm which when asserted causes the line protocol to go down Line and Section Triggers Path Level Triggers Table 4 2 lists the line and section alarms that are triggers by default Table 4 2 Default Line and Section Alarm Triggers Alarm Description SLOS Section loss of signal SLOF Section loss of frame AIS L Line alarm indication signal When one or more of the alarms in Table 4 2 are asserted the line protocol of the interface goes down without a delay You can issue a pos delay triggers line command to delay triggering the line protocol of the interface from going down You can set the delay from 50 to 10000 ms If you do not specify a time interval the default delay is set to 100 ms Table 4 3 lists path alarms that are not triggers by default You can configure these path alarms as triggers and also specify a delay Table 4 3 Configurable Path Alarm Triggers Alarm Description AIS P_ Path alarm indicatio
27. cription of the sonet report and sonet threshold commands refer to the ATM Switch Router Command Reference publication Configuring Loopback The ATM uplink interface is configured by default with no loopback To enable loopback use the loopback command in interface configuration mode I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide Chapter4 Configuring Interfaces WE Configuring the ATM Uplink Interface Catalyst 8540 Configuring CDP The ATM uplink interface is configured by default with Cisco Discovery Protocol CDP disabled To enable CDP use the cdp enable command in interface configuration mode Configuring the Maximum VCs per VP Step 1 Step 2 Step 3 The ATM uplink interface is configured by default to allow a maximum of 1024 VCs per VP To change this value perform the following steps beginning in global configuration mode Command Purpose Router config interface atm Enters interface configuration mode and specifies the ATM Slot subslot interface interface to configure Router config if Router config if atm ve per vp Configures the maximum number of VCs per VP to 16 32 64 num vcs 128 256 512 1024 2048 4096 or 8192 Router config if no shutdown _ Enables the interface with the previous configuration Configuring Virtual Circuits Creating a PVC A virtual circuit is a point to point connection between
28. d That is not the case with IPX however you can configure IPX networks on a subinterface even when the VLANs have not been configured The maximum VLAN bridge group values are as follows e Maximum number of bridge groups 64 Maximum number of interfaces per bridge group 128 e Maximum number of subinterfaces per system 255 For a complete configuration example for VLANs with ISL encapsulation see the Catalyst 8540 CSR with ISL VLAN and BVI with GEC section on page C 1 To monitor the VLANs once they are configured use the commands described in the Monitoring VLAN Operation section on page 4 12 Configuring 802 19 VLAN Encapsulation The IEEE 802 1Q standard provides a method for secure bridging of data across a shared backbone IEEE 802 1Q VLAN encapsulation uses an internal or one level packet tagging scheme to multiplex VLANs across a single physical link while maintaining strict adherence to the individual VLAN domains On an IEEE 802 1Q trunk port all transmitted and received frames are tagged except for those on the one VLAN configured as the PVID port VLAN identifier or native VLAN for the port Frames on the native VLAN are always transmitted untagged and are normally received untagged The VLAN configuration example shown in Figure 4 3 depicts the following Fast Ethernet ports 1 0 0 and subinterface 1 0 1 1 on the switch router are in bridge group 1 They are part of native VLAN 1 which uses 802 1Q
29. d input flow control is unsupported ARP type ARPA ARP Timeout 04 00 00 Last input never output never output hang never Last clearing of show interface counters never Queueing strategy fifo Output queue 0 40 0 drops input queue 0 75 0 drops 5 minute input rate 0 bits sec 0 packets sec 5 minute output rate 0 bits sec 0 packets sec 0 packets input 0 bytes 0 no buffer Received 0 broadcasts 0 runts 0 giants 0 throttles O input errors 0 CRC 0 frame 0 overrun 0 ignored 0 abort 0 watchdog 0 multicast 0 input packets with dribble condition detected 0 packets output 0 bytes 0 underruns 0 0 0 0 output errors 0 collisions 0 interface resets 0 babbles 0 late collision 0 deferred 0 lost carrier 0 no carrier 0 output buffer failures 0 output buffers swapped out The following example shows sample output from the show interface fastethernet command Router show interface fastethernet 1 0 0 FastEthernet1 0 0 is administratively down line protocol is down Hardware is epif_port address is 0010 073c 050f bia 0010 073c 050f Internet address is 10 1 2 4 8 MTU 1500 bytes BW 100000 Kbit DLY 100 usec rely 255 255 load 1 255 Encapsulation ARPA loopback not set keepalive set 10 sec Auto duplex Auto Speed 100BaseTX ARP type ARPA ARP Timeout 04 00 00 Last input never output never output hang never Last clearing of Show interface counters never Queueing strategy fifo Output queue 0 40 0 drops input queue 0 75 0 drop
30. d its interface port identifier see the Interface Port Identifier section on page 4 2 For example to configure the Gigabit Ethernet port on slot 1 port 1 use this command Router config interface gigabitethernet 1 0 1 Layer 3 Switching Software Feature and Configuration Guide 78 6235 04 Cisco 10S Release 12 0 10 W 5 18 PEEN Chapter4 Configuring Interfaces W About Layer 3 Switching Interfaces Step3 Follow each interface command with the interface configuration commands required for your particular interface The commands you enter define the protocols and applications that will run on the interface The commands are collected and applied to the interface command until you enter another interface command a command that is not an interface configuration command or you enter end to return to privileged EXEC mode Step4 Check the status of the configured interface by using the EXEC show commands Router show interface gigabitethernet 1 0 1 GigabitEthernet1 0 1 is up line protocol is up Hardware is Kl Gigabit Port address is 00d0 bald 3207 bia 00d0 bald 3207 MTU 1500 bytes BW 1000000 Kbit DLY 10 usec rely 255 255 load 1 255 Encapsulation ARPA loopback not set keepalive set 10 sec Full duplex mode 1000Mb s Auto negotiation 1000BaseSxX output flow control is unsupported input flow control is unsupported ARP type ARPA ARP Timeout 04 00 00 About Layer 3 Switching Interfaces Layer 3 switchin
31. ects None Alarm reporting enabled for SF SLOS SLOF B1 TCA B2 TCA PLOP B3 TCA Active ATM Payload Defect None OC3 counters bl section BIP 8 errors b2 line BIP 8 errors b3 path BIP 8 errors ocd out of cell delineation errors not implemented gl path FEBE errors z2 line FEBE errors ches correctable HEC errors uhcs uncorrectable HEC errors b1 0 62 0 b30 ocd 0 g1 0 z2 0 chces 0 uhcs 0 OC3 errored secs b1 0 b2 0 b3 0 ocd 0 g1 0 z2 0 chcs 0 uhcs 0 lineAIS 0 lineRDI 0 pathAIS 0 pathRDI 0 OC3 error free secs b1 110 b2 110 b3 110 ocd 0 gGis110 227110 ches s110 uhess110 phy_tx_cnt 38947300 phy_rx_cnt 15 BER thresholds SF 10e 3 SD 10e 6 TCA thresholds Bl 10e 6 B2 10e 6 B3 10e 6 About Port Snooping Port based snooping or mirroring lets you transparently mirror traffic from a source port s to a destination port Multiple snooping sessions can operate simultaneously You can specify whether the source ports are mirrored for transmit receive or both directions at once Port snooping augments the first four RMON groups mini RMON For a description of RMON see the Remote Monitoring section on page 1 11 Port based snooping features include the following Traffic on one or more source ports through a destination port in the same switch router Traffic from multiple source ports in multiple directions transmitting receiving
32. ed with the sonet overhead command the configured value is sent regardless of the encapsulation method The value of the s1s0 byte is determined as follows Ifthe value sisO0 bytes has not been explicitly configured with the sonet overhead command the SONET framer sends the following values For SONET framing the default value is 0 For SDH framing the default value is 2 Ifthe value of the s1sO bits have been explicitly configured with the sonet overhead command the configured value is used regardless of the framing The value of the jO and the j1 bytes are determined as follows Ifthe value of the j0 and the j1 bytes have not been explicitly configured with the sonet overhead command the SONET framer sets default values of 0x0 for both If the user has specified a value using the sonet overhead command the configured value is used regardless of the framing Layer 3 Switching Software Feature and Configuration Guide 432 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring SONET Alarms Configuring the ATM Uplink Interface Catalyst 8540 ii The ATM OC 12c and the ATM OC 3c uplink interfaces support SONET alarm monitoring To configure alarm monitoring perform the following steps beginning in global configuration mode Command Purpose Step1 Router config interface atm slot subslot interface Router config if Enters interface configuration m
33. em VLANs enable efficient traffic separation and provide excellent bandwidth utilization VLANs also alleviate scaling issues by logically segmenting the physical LAN structure into different subnetworks so that packets are switched only between ports within the same VLAN This can be very useful for security broadcast containment and accounting Layer 3 switching software supports a port based VLAN on a trunk port which is a port that carries the traffic of multiple VLANs Each frame transmitted on a trunk link is tagged as belonging to only one VLAN Layer 3 switching software supports VLAN frame encapsulation through the Inter Switch Link ISL protocol and the 802 1Q standard The four adjacent ports such as 0 through 3 or 4 through 7 on a 10 100 interface must all use the same VLAN encapsulation that is either 802 1Q and native or ISL and native Configuring ISL VLAN Encapsulation ISL is a Cisco protocol for interconnecting multiple switches and maintaining VLAN information as traffic travels between switches The VLAN configuration example shown in Figure 4 2 depicts the following Fast Ethernet port 1 0 0 and subinterface 1 0 1 1 on the switch router are in bridge group 1 They are part of VLAN 50 which uses ISL encapsulation Fast Ethernet port 3 0 1 and subinterface 1 0 1 2 are in bridge group 2 They are part of VLAN 100 which uses ISL encapsulation Fast Ethernet port 1 0 1 is configured as an ISL tr
34. g supports two different Gigabit Ethernet interfaces an eight port module and a two port module This section describes the initial configurations for both interface types p Tips Before you configure interfaces be sure to have the interface network IP or IPX addresses and the corresponding subnet mask information If you do not have this information consult your network administrator The Gigabit Ethernet interface modules can be configured as trunk ports non trunking ports routed ports or bridged ports The trunk ports employ 802 1Q encapsulation Inter Switch Link ISL is not supported You can use the Gigabit Ethernet ports as routed interfaces or you can configure the ports into a bridge group which is the recommended configuration By configuring as many ports as possible in a bridge group you can optimize the throughput of your switch router You can also ensure that your networks are routed by using integrated routing and bridging features from Cisco IOS software For configuration instructions see the About Integrated Routing and Bridging section on page 6 4 Between ports on the eight port Gigabit Ethernet interface module itself local switching at Layer 2 provides nonblocking performance at wire speed For ports on this module configured as a bridge group Layer 2 traffic is processed at full Gigabit Ethernet rates For Layer 3 traffic however this interface module provides 2 Gbps routing bandwidth from the swi
35. identifier jO is the section trace byte and sls0 is the bit s1 and sO of the H1 payload pointer byte Step3 Router config if no shutdown Enables the interface with the previous configuration Layer 3 Switching Software Feature and Configuration Guide Pais E 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the POS OC 12c Uplink Interface Catalyst 8540 Ti The value of the c2 byte is determined as follows If the value of the c2 byte has not been explicitly configured with the pos flag command the SONET framer sends the following values For Cisco HDLC encapsulation with or without SPE scrambling OxCF For PPP encapsulation with scrambling 0x16 RFC 2615 For PPP encapsulation without scrambling OxCF RFC 2615 Ifthe value of the c2 byte has been explicitly configured with the pos flag command the configured value is sent regardless of the encapsulation method The value of the s1s0 bits is determined as follows If the value of the s1s0 bits have not been explicitly configured with the pos flag command the SONET framer sends the following values For SONET framing the default value is 0 For SDH framing the default value is 2 If the value of the s1s0 bits have been explicitly configured with the pos flag command the configured value is used regardless of the framing Configuring POS SPE Scrambling SONET payload scrambling applies a self
36. ig subif interface fastethernet slot subslot interface Enters interface configuration mode to configure the Fast Ethernet main interface Router config if bridge group bridge group Assigns the main interface to the bridge group Router config if exit Returns to global configuration mode Router config bridge bridge group protocol ieee Specifies that the bridge group will use the IEEE Ethernet Spanning Tree Protocol I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide 7 Chapter4 Configuring Interfaces W Monitoring VLAN Operation Example The following example shows how to configure the bridging between native and non native 802 1Q VLANs shown in Figure 4 3 Router config interface fastethernet 1 0 1 1 Router config subif encap dotlq 1 native Router config subif bridge group 1 Router config subif interface fastethernet 1 0 0 Router config if bridge group 1 Router config if exit Router config bridge 1 protocol ieee Router config interface fastethernet 1 0 1 2 Router config subif encap dotlq 100 Router config subif bridge group 2 Router config subif interface fastethernet 3 0 1 Router config subif bridge group 2 Router config subif exit Router config bridge 2 protocol ieee Router config exit Router copy system running config nvram startup config Monitoring VLAN O
37. is plop prdi plm p sd ber sf ber slof slos bl tca B1 bit error rate BER threshold crossing alarm uneq p b2 tca B2 BER threshold crossing alarm b3 tca B3 BER threshold crossing alarm The alarms are as follows lais line alarm indication signal Irdi line remote defect indication pais path alarm indication signal plop path loss of pointer prdi path remote defect indication plm p payload label C2 mismatch alarm sd ber LBIP BER in excess of threshold sf ber signal failure BER slof section loss of frame slos section loss of signal uneq p path unequipped C2 alarm The b1 tca b2 tca b3 tca sf ber slof and slos errors are reported by default Step3 Router config if pos threshold Sets the BER threshold values of the specified alarms Default b1 tca b2 tca b3 tca sd ber values are 6 for bl tca b2 tca b3 tca and sd ber 3 for sf ber sf ber rate Step4 Router config if pos ais shut Sends a line alarm indication signal AIS L to the other end of the link after a shutdown command has been issued to the specified POS interface By default the AIS L is not sent to the other end of the link You can stop transmitting the AIS L by issuing either the no shutdown or the no pos ais shut commands To determine which alarms are reported on the POS interface and to display the BER thresholds use the show controllers pos command as des
38. l SLOF section loss of frame AIS L line alarm indication signal e S1 synchronizing status byte in the SONET line overhead is equal to OxF When these conditions clear the clock automatically restores to line clock Customizing the Configuration This section describes how to configure your ATM uplink interface to match your network configuration Setting the MTU Size Step 1 Step 2 Step 3 To set the maximum transmission unit MTU perform the following steps beginning in global configuration mode Command Purpose Router config interface atm Enters interface configuration mode and specifies the ATM Slot subslot interface interface to configure Router config if Router config if mtu bytes Configures the MTU size with a value from 64 to 9188 bytes The default MTU size is 4478 bytes Router config if no shutdown Enables the interface with the previous configuration Layer 3 Switching Software Feature and Configuration Guide 430 E 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the ATM Uplink Interface Catalyst 8540 i Note The ATM uplink supports IP unicast and IP multicast fragmentation For IP unicast fragmentation the packet must ingress on a ATM interface and egress on any interface For IP multicast fragmentation IP multicast data packets greater than 1500 bytes are fragmented to 1500 bytes on the ingress ATM interface befo
39. mode on the POS OC 12c uplink interface perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface pos Enters interface configuration mode and specifies the POS Slot subslot interface interface to configure Router config if Step2 Router config if pos framing Configures the framing mode sdh sonet POS framing defaults to SONET The following default values are used for SONET sls0 default value is 0 JI defaults set to host name interface name and IP address The following default values are used for SDH framing e slsO default value is 2 JI is the path trace string Its default setting is empty and is not configurable Step3 Router config if no shutdown Enables the interface with the previous configuration Configuring SONET Overhead You can set the SONET overhead bytes in the frame header to meet a specific standards requirement or to ensure interoperability of the POS OC 12c uplink interface with another vendor s equipment To configure the SONET overhead perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface pos Enters interface configuration mode and specifies the POS Slot subslot interface interface to configure Router config if Step2 Router config if pos flag c2 Configures the SONET overhead bytes 2 is a path signal value jO value sls0 value
40. n signal RDI P__ Path remote defect indication LOP P Path loss of pointer You can issue the pos delay triggers path command to configure the path alarms listed in Table 4 3 as triggers These triggers will bring down the line protocol of the interface When you configure the path alarms as triggers you can simultaneously specify a delay for the triggers You can set the delay from 50 to 10000 ms If you do not specify a time interval the default delay is set to 100 ms The pos delay triggers path configuration can also bring the line protocol of the interface down when the higher of the B2 and B3 error rates is compared with the SF signal failure threshold If the SF threshold is crossed then the line protocol of the interface goes down Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 a 421 Chapter4 Configuring Interfaces HI Configuring the POS OC 12c Uplink Interface Catalyst 8540 To configure a delay in triggering the line protocol of the interface from going down perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface pos Enters interface configuration mode and specifies the POS Slot subslot interface interface to configure Router config if Step2 Router config if pos report Permits console logging of selected SONET alarms ais pais plopl prdi slof The alarms are as
41. ne enhanced Gigabit Ethernet port For instructions on configuring the enhanced Gigabit Ethernet interface see the About the Enhanced Gigabit Ethernet Interfaces Catalyst 8540 section on page 4 5 Configuration Overview The following steps provide on overview of configuring an ATM uplink from the switch router to the ATM network Step1 Configure the ATM uplink interface a Enable the ATM interface b Customize the configuration by configuring PVCs and SVCs You must configure at least one PVC or SVC The VC options you configure must match in three places on the switch router on the ATM switch and at the remote end of the PVC or SVC connection Step2 Configure the ATM switch to which the ATM uplink connects Default Configuration On power up the ATM uplink interface is shut down When you enter the no shutdown command the interface is enabled with the default configuration values shown in Table 4 4 Table 4 4 ATM Uplink Interface Default Configuration Values Parameter Configuration Command Default Value Maximum transmission unit no mtu bytes 4470 bytes MTU Loopback no loopback No loopback SONET framing no atm sonet stm 1 for OC 3 no stm 1 no atm sonet stm 4 for OC 12 no stm 4 Layer 3 Switching Softw are Feature and Configuration Guide 428 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces Configuring the ATM Uplink Interface Catalyst 8540
42. net address is 10 1 2 3 8 MTU 4470 bytes BW 622000 Kbit DLY 100 usec rely 255 255 load 1 255 Encapsulation PPP cre 32 loopback not set keepalive not set Scramble enabled LCP REQsent Closed CDPCP Last input never output never output hang never Last clearing of Show interface counters never Queueing strategy fifo Output queue 0 40 0 drops input queue 0 75 0 drops 5 minute input rate 0 bits sec 0 packets sec 5 minute output rate 0 bits sec 0 packets sec 0 packets input 0 bytes 0 no buffer Received 0 broadcasts 0 runts 0 giants 0 throttles 0 parity input errors 0 CRC 0 frame 0 overrun 0 ignored 0 abort packets output 480 bytes 0 underruns output errors 0 applique 5 interface resets output buffer failures 0 output buffers swapped out r eG A e a carrier transitions The following example shows output for the show protocols pos command Router show protocols pos 1 0 0 POS1 0 0 is up line protocol is down Internet address is 10 1 2 3 8 I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide m Chapter4 Configuring Interfaces HI Configuring the POS OC 12c Uplink Interface Catalyst 8540 The following example shows output for the show controllers pos command Router show controllers pos 2 0 0 Interface POS2 0 0 Hardware is Packet Over SONET One port OC12 Single Mode Intermediate Reach POS2 0 0 SECTION LOF 1 LOS 0 BIP Bl
43. ng properties for a newly installed POS OC 12c uplink interface IP routing IP address Encapsulation type e Clock source You should also configure the following properties to match those of the interface at the other end Keepalive messages Cisco Discovery Protocol CDP e Cyclic redundancy check CRC Scrambling Encapsulation type Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 2415 Chapter4 Configuring Interfaces HI Configuring the POS OC 12c Uplink Interface Catalyst 8540 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 To initially configure the POS OC 12c uplink interface perform the following steps beginning in global configuration mode Command Purpose Router config ip routing Enables IP routing Router config interface pos Enters interface configuration mode and specifies the POS slot subslot interface interface to configure Router config if Router config if ip address Assigns an IP address and subnet mask to the interface ip address subnet mask Router config if encapsulation Specifies the encapsulation type hdlc ppp Router config if clock source _ Specifies the clock source for the interface When clocking is line internal derived from the received clock line the default is used When no line clocking source is available internal is used Router config if no shutdown
44. nooping source port can be on any interface module The normal operation of a snooping source port is not altered during snooping operations Any port with bandwidth less than or equal to the bandwidth of the snooping destination port can function as a snooping source port Layer 3 switching software supports snooping from multiple source ports to a destination port The total bandwidth of the snooping source ports must not exceed the bandwidth of the snooping destination port For example up to ten Fast Ethernet ports can be configured as snooping source ports to a 1 Gb Ethernet destination port Configuring Snooping amp To enable port based snooping on an interface perform the following steps beginning in global configuration mode Note You must shut down the destination interface before you enable snooping mode To bring the interface up after you have finished configuring snooping be sure to issue a no shutdown command Layer 3 Switching Softw are Feature and Configuration Guide 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 BEN Chapter4 Configuring Interfaces E Configuring Snooping Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 2 Command Purpose Router config interface destination port Router config if Defines the interface configuration for the destination test port Router config if shutdown Shuts down
45. ns to privileged EXEC mode Router copy system running config Saves your configuration changes to NVRAM nvram startup config Example The following example demonstrates initially configuring a Gigabit Ethernet interface with autonegotiation and an IP address Router Router config interface gigabitethernet 0 0 0 config if negotiation auto config if ip address 10 1 2 3 255 0 0 0 Router config if exit Router config Z C8540 CSR copy system running config nvram startup config Router About the Enhanced Gigabit Ethernet Interfaces Catalyst 8540 The enhanced Gigabit Ethernet interface module provides two Gigabit Ethernet interfaces with built in ACL support no daughter card is required The POS OC 12c uplink interface module and the ATM uplink interface module also include a single enhanced Gigabit Ethernet interface See Configuring the POS OC 12c Uplink Interface Catalyst 8540 section on page 4 14 and Configuring the ATM Uplink Interface Catalyst 8540 section on page 4 28 There is no special configuration required for the enhanced Gigabit Ethernet interfaces other than that used for other Gigabit Ethernet interfaces Layer 3 Switching Software Feature and Configuration Guide I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 PEN Chapter4 Configuring Interfaces WE About Layer 3 Switching Interfaces Initially Configuring Fast Ethernet Interfaces Step 1 Step 2 Step 3
46. ode for the clock is no internal which is the same as the line clock Router config if no shutdown Enables the interface with the previous configurations I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Softw are Feature and Configuration Guide Chapter4 Configuring Interfaces W Configuring the ATM Uplink Interface Catalyst 8540 Example The following configuration is an example of the tasks in the preceding table config interface atm 2 0 0 config if ip address 10 1 2 4 255 0 0 0 config if atm clock internal config if no shutdown Router Router Router Router Configuring the Clock Source The ATM uplink interfaces support internal and line clock source The default mode for the clock is no internal which is the same as the line clock If your system clock source is set to line clock it uses the recovered received clock to transmit When two ATM uplink interfaces are connected and set to line clock both interfaces at each end of the link cannot accurately synchronize the clock This causes transfer of corrupt data which might cause the line protocol on both interfaces to go down To prevent this situation make sure you configure one end of the connection with internal clock and the other end with no internal clock When your system is configured to use the line clock the following conditions cause the clock to automatically revert to internal e SLOS section loss of signa
47. ode and specifies the ATM interface to configure Step2 Router config if sonet report b1 tca b2 tca b3 tca lais Irdi pais plm p plop prdi rdool sd ber sf ber slof slosl tim p uneq p Permits console logging of selected SONET alarms The alarms are as follows b1 tca B1 bit error rate BER threshold crossing alarm b2 tca B2 BER threshold crossing alarm b3 tca B3 BER threshold crossing alarm lais line alarm indication signal Irdi line remote defect indication pais path alarm indication signal plm p payload label C2 mismatch alarm plop path loss of pointer prdi path remote defect indication rdool receive data out of lock sd ber LBIP BER in excess of threshold sf ber signal failure BER slof section loss of frame slos section loss of signal tim p path trace identifier J1 mismatch alarm uneq p path unequipped C2 alarm The b1 tca b2 tca b3 tca plop sf ber slof slos are enabled by default Step3 Router config if sonet threshold b1 tca b2 tca b3 tca sd ber sf ber rate Sets the BER threshold values of the specified alarms Default values are 6 for b1 tca b2 tca b3 tca and sd ber 3 for sf ber To determine which alarms are reported on the ATM interface and to display the BER thresholds use the show controllers atm command as described in the Verifying the ATM Configuration section on page 4 36 For a detailed des
48. one is comprised of POS links among Catalyst 8540 campus switch routers in each building Figure 4 4 POS for Enterprise Backbone Connectivity OC 12c POS OC 12c POS OC 12c POS OC 12c POS 30746 I 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 Layer 3 Switching Software Feature and Configuration Guide E Chapter4 Configuring Interfaces E Configuring the POS OC 12c Uplink Interface Catalyst 8540 Figure 4 5 shows an example of a service provider application of the POS OC 12c uplink interface module Here traffic is aggregated from Catalyst 8500 CSRs over POS OC 12c interfaces to Cisco 12000 GSRs POS OC 48 interfaces on the Cisco 12000 gigabit switch routers then provide the uplinks to the Internet backbone Figure 4 5 POS for Aggregated Traffic Uplink to Intemet Internet Backbone gt OC 48c STM 16 30747 DDDB Catalyst 8540s Configuring the POS OC 12c Uplink Interface Catalyst 8540 This section describes the default configuration of the POS OC 12c uplink interface initial configurations you should perform for a newly installed interface and optional configurations you can do to customize the interfaces to the requirements of your network L Note The POS OC 12c uplink interface module consists of one OC 12c port and one enhanced Gigabit Ethernet port For instructions on configuring the Gigabit Ethernet interface see the About the Enhanced Gigabit Ethernet Interfaces Catalyst 8540
49. onfiguring the POS OC 12c Uplink Interface Catalyst 8540 Interrupt Mask Register 0x0001 Parity Error Register 0x0000 Scratch Register 0x80000000 Debug Register 0x0000 CRC32 enabled PPP enc Diag control reg 1 0x0 GPIO port loop timed GPIO port no loop rpp_pml packet 1154 rpp_pm2 bytes 36225 rpp_pm3 cre 105 rpp_pm4 runts 67 rpp_pm5 giants 0 rpp_pm6 ignore 142 rpp_pm7 abort 0 tpp_pml packet 554 tpp_pm2 bytes 15127 tpp_pm3 stuff 41 tpp_pm4 underflow 0 tpp_pm5 ext er 0 tpp_pm6 1 byte 0 eres Skystone Registers line_cfg_cntr1l 0x3 MIF_cntrl_u 0x0 gpio_port_u 0x0 gpio_port_1 0x40 gpio_port_cntrl_u 0xF gpio_port_cntrl_1 0xFF hi_prio_intr_mask_u 0x0 hi_prio_intr_mask_1 0x0 tor_ram_c2 0x16 rpp_cntrl_1 0x3F p_max_pkt_len_u 0x11 p_max_pkt_len_1 0xF4 p_min_pkt_len 0x3 p_cntrl_2 0x3 p_cntrl_1 0x40 og_cntrl 0x22 p_inter_pkt_u 0x0 p p p p p p p p p_inter_pkt_1 0x0 tog_ovrhd_src_1 0x80 x t t t t tpog_cntrl 0x22 sys_intf_cntrl_1 0x5 sys_intf_cntrl_2 0x0 hi_prio_intr_status_u 0x0 hi_prio_intr_status_1 0x0 lo_prio_intr_mask 0xFF lo_prio_intr_status 0x0 XPIF SLICER Registers SMDR OxFF78 SSTR 0x1200 SSMR 0x4002 EVER 0x3001 SIMR 0x0000 MBXW 0x0000 MBXR 0x0000 SPER OxF000 Xpif Counters MR1 21723 MR2 0 MR3 0 MR4 0 MRS 3 MR6 0 MR7 0 MR8 0 MRO 0 MR10 0 MR11 1152 MR12 0
50. or both e Multiple snoop destination ports operating simultaneously however there is only one destination port per snooping session mi Layer 3 Switching Softw are Feature and Configuration Guide 78 6235 04 Cisco IOS Release 12 0 10 W 5 18 l Chapter4 Configuring Interfaces Configuring Snooping Hl Restrictions on Port Snooping The following restrictions apply to port snooping The combined physical bandwidth of the source ports must not exceed the physical bandwidth of the destination port The snooping source port and destination port cannot be the same port Port snooping is not available on the eight port Gigabit Ethernet interfaces About the Snooping Destination Port The snooping destination port can be any port in the system except for the management port on the route processor Ethernet0 and ports configured for Fast EtherChannel Typically the destination port has a network analyzer or RMON probe attached to it When in snooping mode all the existing connections to the snooping destination port are set to the down state and the snooping destination port cannot perform any Layer 2 or Layer 3 operations in this state The receive side of the snooping destination port is also disabled when in snooping mode The snooping destination port resumes normal operation only when snooping mode is disabled About the Snooping Source Port A source port is a port monitored by the snooping operation The s
51. peration Once the VLANs are configured on the switch router you can monitor their operation using the following commands Command Purpose show vlan vlan id Displays information on all configured VLANs or on a specific VLAN by VLAN ID number clear vlan vlan id Clears the counters for all VLANs when the VLAN ID is not specified debug vlan packet Displays contents of the packets sent to and exiting from the route processor To configure encapsulation over the EtherChannel see the About Encapsulation over EtherChannel section on page 7 6 About Packet over SONET Catalyst 8540 Synchronous Optical Network SONET is an octet synchronous multiplex scheme that defines a family of standard rates and formats Optical specifications are defined for single mode fiber and multimode fiber The transmission rates are integral multiples of 51 840 Mbps For example the POS OC 12c uplink interface provides 622 080 Mbps over single mode optical fiber POS provides for the serial transmission of data over SONET frames using either High Level Data Link Control HDLC protocol the default or Point to Point Protocol PPP encapsulation On serial interfaces Cisco s implementation provides error detection and synchronous framing functions of traditional HDLC without the windowing or retransmission that are found in traditional HDLC Layer 3 Switching Software Feature and Configuration Guide Pal 78 6235 04 Cisco IOS Relea
52. re being switched to other members in the multicast group All the members in the multicast group must have a MTU equal to or greater than 1500 bytes Configuring SONET Framing In STM 1 mode or STM 4 mode the ATM uplink interface sends idle cells for cell rate decoupling In STS 3c mode or STS 12c mode the interface sends unassigned cells for cell rate decoupling STS 3c is the default SONET framing mode for the ATM OC 3c uplink interface STS 12c is the default SONET framing mode for the ATM OC 12c uplink interface To configure the SONET framing mode perform the following steps beginning in global configuration mode Command Purpose Stepl Router config interface atm Enters interface configuration mode and specifies the ATM slot subslot interface interface to configure Router config if Step2 Router config if atm sonet Configures the SONET framing mode to STM 1 for the OC 3c stm 1 ATM interface or to STM 4 for the OC 12c interface or Router config if atm sonet stm 4 Step3 Router config if no shutdown Enables the interface with the previous configuration To return the SONET framing mode to the default use the no form of the atm sonet command Configuring SONET Overhead You can use the sonet overhead command to set the SONET overhead bytes in the frame header to meet a specific standards requirement or to ensure interoperability of the ATM uplink interface with another vendor s equipment
53. rmat slot number subslot number interface number The slot in which the The subsiot in which the The port or interface interface module or port interface module or port number on the interface adapter is installed adapter is installed For a module or port adapter Slots are numbered full width interface Numbering always starts starting at 0 module this number is at 0 and goes from left to always 0 right 27934 The interface port identifiers on the Ethernet modules remain the same regardless of whether other modules are installed or removed However when you move an interface module to a different slot the first number in the address changes to reflect the new slot number You can identify module ports by physically checking the slot subslot interface location on the back of the switch router You can also use Cisco IOS show commands to display information about a specific interface or all the interfaces in the switch router General Instructions for Configuring Interfaces The following general configuration instructions apply to all interfaces Begin in global configuration mode To configure an interface follow these steps Step1 Use the configure EXEC command at the privileged EXEC prompt to enter the global configuration mode Router gt enable Router configure terminal Router config Step2 Enter the interface command followed by the interface type for example Fast Ethernet or Gigabit Ethernet an
54. s 5 minute input rate 0 bits sec 0 packets sec 5 minute output rate 0 bits sec 0 packets sec 0 packets input 0 bytes Received 0 broadcasts 0 runts 0 giants 0 throttles input errors 0 CRC 0 frame 0 overrun 0 ignored 0 abort watchdog 0 multicast input packets with dribble condition detected packets output 0 bytes 0 underruns output errors 0 collisions 0 interface resets babbles 0 late collision 0 deferred lost carrier 0 no carrier 0 0 0 0 0 0 0 0 output buffer failures 0 output buffers swapped out Layer 3 Switching Software Feature and Configuration Guide 78 6235 04 Cisco 10S Release 12 0 10 W 5 18 a 47 Chapter4 Configuring Interfaces HE About Virtual LANs About Virtual LANs 2 Virtual LANs enable network managers to group users logically rather than by physical location A virtual LAN VLAN is an emulation of a standard LAN that allows data transfer and communication to occur without the traditional restraints placed on the network It can also be considered a broadcast domain set up within a switch With VLANs switches can support more than one subnet or VLAN on each switch and give routers and switches the opportunity to support multiple subnets on a single physical link A group of devices on a LAN are configured so that they communicate as if they were attached to the same LAN segment when they are actually located on different segments Layer 3 switching supports up to 255 VLANs per syst
55. se 12 0 10 W5 18 Chapter 4 Configuring Interfaces About the POS OC 12c Uplink Interface W Because SONET SDH Synchronous Digital Hierarchy is by definition a point to point circuit PPP is well suited for use over SONET links The octet stream is mapped into the SONET SDH synchronous payload envelope SPE in accordance with RFC 2615 PPP over SONET SDH and RFC 2615 PPP in HDLC like Framing Octet boundaries are aligned with the SPE octet boundaries and the PPP frames are located by row within the SPE payload Because frames are variable in length the frames can cross SPE boundaries Using this scheme multiprotocol data can be encapsulated and transported directly into SONET frames without relying on ATM to provide Layer 2 capability for example in IP over ATM over SONET About the POS OC 12c Uplink Interface POS technology is ideally suited for networks that are built for providing Internet or IP data It provides superior bandwidth utilization and efficiency over other transport methods For expensive WAN links POS can provide as much as 25 to 30 percent higher throughput than ATM based networks Transporting frames directly into the SONET SDH payload eliminates the overhead required in ATM cell header IP over ATM encapsulation and segmentation and reassembly SAR functionality Figure 4 4 shows a typical application of the POS OC 12c uplink interface module in an enterprise setting Here the enterprise backb
56. tch fabric Layer 3 Switching Softw are Feature and Configuration Guide xs 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces About Layer 3 Switching Interfaces Ti Initially Configuring Gigabit Ethernet Interfaces Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 To configure an IP address and autonegotiation on a Gigabit Ethernet interface perform the following steps beginning in global configuration mode Command Purpose Router config interface gigabitethernet Enters Ethernet interface configuration mode to Slot subslot interface configure the Gigabit Ethernet interface Router config if Router config if no negotiation auto Specifies the negotiation mode When you set negotiation mode to auto the Gigabit Ethernet port attempts to negotiate the link that is both port speed and duplex setting with the partner port When you set the Gigabit Ethernet interface to no negotiation auto the port forces the link up no matter what the partner port setting is This brings up the link with 1000 Mbps and full duplex only Router config if ip address ip address Specifies the IP address and IP subnet mask to be subnet mask assigned to the Gigabit Ethernet interface Router config if exit Returns to global configuration mode Repeat Router config Steps 1 to3 to configure another Gigabit Ethernet interface on this interface module Router config end Retur
57. terfaces have both a Media Access Control MAC address and an interface port ID The router keeps track of these designators and uses them to route traffic Media Access Control Address p The MAC address also referred to as the hardware address is required for every port or device that connects to a network Other devices in the network use MAC addresses to locate specific ports in the network and to create and update routing tables and data structures To find the MAC address for a device use the show interfaces command Interface Port Identifier The interface port identifier designates the physical location of the Layer 3 interface within the chassis This is the name that you use to identify the interface when configuring it The system software uses interface port identifiers to control activity within the switch router and to display status information Interface port identifiers are not used by other devices in the network they are specific to the individual switch router and its internal components and software You can find the interface port identifier on the rear of the switch router It is composed of three parts formatted as slot subslotlinterface as depicted in Figure 4 1 Layer 3 Switching Software Feature and Configuration Guide P42 E 78 6235 04 Cisco IOS Release 12 0 10 W5 18 Chapter4 Configuring Interfaces General Instructions for Configuring Interfaces W Figure 4 1 Interface Port Identifier Fo
58. the destination port Router config if snoop interface source port direction receive transmit both Defines a snoop source port and its snoop direction You must issue separate snoop interface commands for each source port Router config if no shutdown Reenables the interface When you bring the destination port back up snooping mode is fully functional Router config if end Router Returns to privileged EXEC mode Router copy system running config nvram startup config Saves your configuration changes to NVRAM For a complete configuration example that includes port snooping see the Catalyst 8540 CSR with ISL VLAN and BVI with GEC section on page C 1 To disable port based snooping on an interface perform the following steps Command Purpose Router config interface fastethernet Slot subslot interface or Router config interface gigabitethernet Slot subslot interface Router config if Enters interface configuration mode for the previously configured destination port Router config if shutdown Shuts down the destination port Router config if no snoop interface source port Disables port snooping by the destination port defined in Step 1 on the indicated source port Router config if no shutdown Reenables the interface When you bring the destination port back up snooping mode is disabled and any existing configuration and connections
59. unk Layer 3 Switching Software Feature and Configuration Guide Pas B 78 6235 04 Cisco IOS Release 12 0 10 W5 18 _ Chapter 4 Configuring Interfaces Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Configuring ISL VLAN Encapsulation W Campus Figure 4 2 Example of an ISL VLAN Bridging Configuration Bridge group 1 1 0 1 1 10 9 VLAN 50 es encap isl 50 Campus encap isl 100 switch router VLAN 100 1 0 1 2 3 0 1 Bridge group 2 17489 To configure the Layer 3 VLANs shown in Figure 4 2 perform the following steps beginning in global configuration mode Command Purpose Router config interface fastethernet slot subslot interface subinterface Router config subif Enters subinterface configuration mode Router config subif encapsulation isl vlan id Specifies ISL encapsulation for the Ethernet frames sent from this subinterface with a header that maintains the specified VLAN ID between network nodes Router config subif bridge group bridge group Assigns the subinterface a bridge group number Note When you are configuring VLAN routing skip this step Router config subif interface fastethernet slot subslot interface Router config if Enters interface configuration mode to configure the Fast Ethernet main interface Router config if bridge group bridge group Assigns the main
60. ws a Catalyst 8540 deployed as a Layer 3 switch CSR to be connected to a Catalyst 8540 deployed as an ATM switch MSR Figure 4 6 shows an example application of the ATM uplink in which traffic from a LAN switch is aggregated at the Catalyst 8540 CSR and then passed to the ATM network over the ATM uplink The Layer 3 enabled ATM uplink supports RFC 1483 Multiprotocol Encapsulation over ATM which provides for the mapping of Layer 3 addresses to ATM virtual circuits and traffic shaping Refer to the Guide to ATM Technology for additional information on RFC 1483 Figure 4 6 Layer 3 Traffic with ATM Uplink Wiring closet y ATM uplink Catalyst 8540 CSR ATM network Catalyst 8540 MSR 32973 Layer 3 Switching Software Feature and Configuration Guide 78 6235 04 Cisco 10S Release 12 0 10 W 5 18 a 427 Chapter4 Configuring Interfaces WE Configuring the ATM Uplink Interface Catalyst 8540 amp Note The ATM uplink interface module does not work in a Catalyst 8540 MSR when the ATM router module is present Configuring the ATM Uplink Interface Catalyst 8540 This section describes the default configuration of the ATM uplink interface initial configurations you should perform for a newly installed interface and optional configurations you can do to customize the interfaces to the requirements of your network L Note The ATM uplink interface module consists of one OC 12c or OC 3c port and o

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