Implementing Cisco Service Provider Advanced Routing Solutions (SPRI) — Question 14

Which statement about BFD on Cisco IOS XR Software is true?

Answer options

• A. Cisco IOS XR router must use LDP to route back to the Cisco IOS router to establish the peer relationship.
• B. Cisco IOS XR Software does not support BFD multihop for IPv4.
• C. Cisco IOS XR router must use dynamic routing or a static route back to the Cisco IOS router to establish the peer relationship.
• D. BFD is not compatible between Cisco IOS XR and Cisco IOS Software.

Correct answer: C

Explanation

The correct answer is C because a Cisco IOS XR router requires either dynamic routing protocols or a static route to establish a peer relationship with a Cisco IOS router. Option A is incorrect since LDP is not a requirement for establishing BFD sessions. Option B is false because Cisco IOS XR does support BFD multihop for IPv4. Option D is incorrect as BFD is designed to be compatible between Cisco IOS XR and Cisco IOS Software.