Implementing Cisco Service Provider Advanced Routing Solutions (SPRI) — Question 94

An engineer is implementing LFA FRR on PE routers to allow unicast traffic to rapidly converge around link or node failures. The engineer configured IS-IS on the newly deployed routers in the data center in the same exchange as other routers. Which additional action must the engineer take before configuring LFA on the PE routers?

Answer options

• A. Configure IP Cisco Express Forwarding on each router.
• B. Configure the isis network point-to-multipoint command on each router.
• C. Configure MPLS on each router.
• D. Configure the isis network point-to-point command on each router.

Correct answer: D

Explanation

The correct answer is D because configuring the isis network point-to-point command is necessary for establishing a point-to-point topology, which is required for LFA FRR to function effectively. The other options, while related to router configurations, do not directly pertain to the necessary topology for LFA FRR.