Enabling IPv4 IS-IS Auto FRR

Procedure

1. Run system-view

   The system view is displayed.

2. Run isis [ process-id ]

   The IS-IS process is enabled and the IS-IS view is displayed.

3. Run frr

   The IS-IS Auto FRR view is displayed.

4. (Optional) Run frr-policy route route-policy route-policy-name

   Backup routes are filtered using a filtering policy. Only backup routes that have passed the filtering policy are added to the routing table.

5. Run loop-free-alternate [ level-1 | level-2 | level-1-2 ]

   IS-IS Auto FRR is enabled and the loop-free backup route is created.

   If the IS-IS level is not specified, IS-IS Auto FRR is enabled on Level-1 and Level-2 to create the backup route.

   

   IS-IS can create the loop-free backup route only if the interface cost is in compliance with the traffic protection inequality of IS-IS Auto FRR.