Enabling IS-IS Globally

IS-IS must be enabled globally on the device.

Use the router isis command in global configuration mode to globally enable IS-IS on the intermediate system.

The following example shows how to globally enable IS-IS routing on the device:

System(rw)->configure
System(rw-config)->router isis
System(rw-config-isis)->

The IS-IS type for the intermediate system defaults to Level 1 and 2. You can change the IS-IS type for the intermediate system to IS-IS type Level 1 or IS-IS type Level 2.

Use the is-type command to configure the IS-IS type for the intermediate system.