IS-IS must be enabled in order for the protocol to be active.
Careful planning is essential to implement commands that can affect the behavior of global and interface levels.
To configure IS-IS on a router, use the config>router router-name>isis [isis-instance] command.
IS-IS also supports the concept of multi-instance IS-IS which allows separate instances of the IS-IS protocol to run independently of the 7210 SAS router. Separate instances are created by adding a different instance ID as the optional parameter in the config>router>isis command.
Not all 7210 SAS platforms support use of multi-instances simultaneously. For more information, see the preceding configuration notes.