Enabling IS-IS for an Interface

1. Enter the configure terminal command to access global configuration mode.
   

   device# configure terminal

2. Enter the interface ethernet command and specify an interface.
   

   device(config)# interface ethernet 1/2
   

3. Enter the ip router isis command to enable IS-IS for the interface.
   

   device(conf-if-eth-1/2)# ip router isis
   

The following example enables IS-IS routing for an interface Ethernet.

device# configure terminal
device(config)# interface ethernet 1/2
device(conf-if-eth-1/2)# ip router isis