Deploying Cisco Service Provider Core Network Technologies (SPCORE, legacy) — Question 14

Which IOS XR Software feature supports establishing point-to-point and point-to-multipoint TE tunnels traversing multiple IGP areas and levels allowing headend and tailend routers to reside in different areas?

Answer options

• A. loose hop reoptimization
• B. FRR mode protection
• C. interarea support
• D. loose hop expansion

Correct answer: B

Explanation

The correct answer is B, as FRR mode protection is specifically designed to maintain tunnel integrity across different IGP areas. The other options do not provide the same level of support for TE tunnels across multiple areas, as loose hop reoptimization (A) and loose hop expansion (D) focus on different aspects of traffic engineering, while interarea support (C) is more about connectivity than establishing tunnels.