Designing Cisco Data Center Infrastructure (DCID) — Question 90

A Cisco engineer is configuring MPLS VPN BGP at a customer site that is connected to the provider site by more than one path. MPLS VPN BGP Local Convergence link protection is enabled. After the engineer installs the main forwarding path and the redundant backup path within the BGP, they assign a unique route distinguisher to each VRF table on all PE devices that serve as a backup to the link.

What is a prerequisite for this local convergence to work?

Answer options

• A. IP/GRE is enabled.
• B. Interautonomous system option A (back-to-back VRF) is active.
• C. BGP must support lossless switchover between operational paths.
• D. The system is performing a PE-CE link protection on both ends.

Correct answer: C

Explanation

For local convergence to operate effectively, BGP must be capable of supporting a lossless transition between operational paths, which is why option C is correct. Options A and B are not prerequisites specifically for local convergence, while option D relates to link protection but does not directly address the BGP functionality needed for seamless path switchover.