Setting Router Type

You can specify whether the router behaves as an IS-IS station router, area router, or both.

is-type

Use to configure the router to act as either a station router (level 1), an area router (level 2), or as both a station router and an area router (level-1-2).
Always configure the type of IS-IS router.
Level-1-2 is the default.
Example host1(config-router)#is-type level-2-only
Use the no version to restore the default value, level-1-2.
See is-type