Use the following CLI syntax to configure an area ID also called an address. A maximum of 3 area-id can be configured.
config>router# isis area-id area-address
The following example configures the router’s area ID.
Example
config>router>isis#
config>router>isis# area-id 49.0180.0001
config>router>isis# area-id 49.0180.0002
config>router>isis# area-id 49.0180.0003
The following example displays the area ID configuration:
A:ALA-A>config>router>isis# info
----------------------------------------------
area-id 49.0180.0001
area-id 49.0180.0002
area-id 49.0180.0003
----------------------------------------------
A:ALA-A>config>router>isis#