Network Router User Manual

4-36
Layer 3 Switching Software Feature and Configuration Guide
78-6235-04, Cisco IOS Release 12.0(10)W5(18)
Chapter 4 Configuring Interfaces
Configuring the ATM Uplink Interface (Catalyst 8540)
SVC Example
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 connect two switch
routers with ATM interfaces through an ATM cloud of other switches:
Switch Router A
Router(config)# interface atm 1/0/0
Router(config-if)# ip address 192.192.192.1 25..255.255.0
Router(config-if)# atm pvc 1 0 5 qsaal
Router(config-if)# atm pvc 2 0 16 ilmi
Router(config-if)# atm esi-address 111111111111.00
Router(config-if)# map-group SVC
Router(config-if)# exit
Router(config)# map-list SVC
Router(config-map-list)# ip 192.192.192.2 atm-nsap BB.000000000000000000000000.222222222222.00 broadcast
Switch Router B
Router(config)# interface atm 1/0/0
Router(config-if)# ip address 192.192.192.2 25..255.255.0
Router(config-if)# atm pvc 1 0 5 qsaal
Router(config-if)# atm pvc 2 0 16 ilmi
Router(config-if)# atm esi-address 222222222222.00
Router(config-if)# map-group SVC
Router(config-if)# exit
Router(config)# map-list SVC
Router(config-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.
show atm vc [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.