Cisco Catalyst 3750 Software Configuration Manual page 671

Chapter 28 Configuring IP Unicast Routing
Command
Step 6 exit
Step 7
interface interface-id
Step 8
ip router isis [area tag]
Step 9
clns router isis [area tag]
Step 10 ip address ip-address-mask
Step 11 end
Step 12 show isis [area tag] database detail
Step 13
copy running-config startup-config
To disable IS-IS routing, use the no router isis area-tag router configuration command.
This example shows how to configure three routers to run conventional IS-IS as an IP routing protocol.
In conventional IS-IS, all routers act as Level 1 and Level 2 routers (by default).
Router A
Switch(config)# clns routing
Switch(config)# router isis
Switch(config-router)# net 49.0001.0000.0000.000a.00
Switch(config-router)# exit
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config-router)# exit
Router B
Switch(config)# clns routing
Switch(config)# router isis
Switch(config-router)# net 49.0001.0000.0000.000b.00
Switch(config-router)# exit
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# ip router isis
Switch(config-if)# clns router isis
Switch(config-router)# exit
78-15870-01
Purpose
Return to global configuration mode.
Specify an interface to route IS-IS, and enter interface configuration mode.
If the interface is not already configured as a Layer 3 interface, enter the no
switchport command to put it into Layer 3 mode.
Configure an IS-IS routing process for ISO CLNS on the interface and
attach an area designator to the routing process.
Enable ISO CLNS on the interface.
Define the IP address for the interface. An IP address is required on all
interfaces in an area enabled for IS-IS if any one interface is configured for
IS-IS routing.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring ISO CLNS Routing
28-69