Verification

Upon checking the RIB, the output clearly indicates that in the event of a P2-P3 link failure, the backup path from P2 to the destination router PE5 avoids using the P2-P7 link. This behavior aligns with the configuration within the same SRLG, where SRLG protection is requested.

Backup path in the RIB

The backup path now traverses via P6 and then P7 instead:

RP/0/RP0/CPU0:P2#show isis fast-reroute detail 5.5.5.5/32
L2 5.5.5.5/32 [30/115] Label: 16005, medium priority
   Installed Jan 01 07:43:32.347 for 00:00:14
     via 23.0.0.3, GigabitEthernet0/0/0/0, Label: 16005, P3, SRGB Base: 16000, Weight: 0
       Backup path: TI-LFA (srlg), via 26.0.0.6, GigabitEthernet0/0/0/1 P6, SRGB Base: 16000, Weight: 0, Metric: 140
         P node: P6.00 [6.6.6.6], Label: ImpNull
         Q node: P7.00 [7.7.7.7], Label...