Configuring IS-IS to Advertise Specified External Routes to an IS-IS Routing Domain

Context

When the local IS-IS device advertises imported external routes to other IS-IS devices, routing policies can be configured to advertise only the external routes that meet specified conditions if these devices do not require all the imported external routes.

Procedure

Run system-view
The system view is displayed.
Run isis [ process-id ]
The IS-IS view is displayed.
Run filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]
IS-IS is configured to advertise the external routes that meet specified conditions to the IS-IS routing domain.