300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

By Cisco · Question Mode

QuestionQ145

MPLS and Segment Routing

A regional service provider provides connectivity for several midsize businesses that run mission-critical applications between multiple offices connected via PE1 and PE2. Links throughout the service provider network are connected using shared resources, and an SR-TE tunnel is in use to route traffic over different paths depending on congestion policies. The networking team must implement SR updates to reduce downtime in the event of a link failure.

Which action must the team take to meet the requirements?

Question Image

  • A Implement BGP timers to support immediate reconvergence when the BGP neighbor relationship status changes.
  • B Implement VRFs to segment the network and avoid large-scale network outages when a link fails.
  • C Implement targeted LDP neighbors to prevent unwanted LDP relationships from forming.
  • D Implement SRLG protection to Identify a post-convergence backup path
Explanation

Because the network links share underlying physical resources, a failure on one link could also affect what appears to be an alternate backup path if that path relies on the same shared resource. Implementing SRLG (Shared Risk Link Group) protection allows the network to identify and compute a post-convergence backup path that avoids links sharing the same risk group as the primary path. This ensures that when a link fails, traffic can be rerouted onto a genuinely diverse path, minimizing downtime for the mission-critical applications traversing the SR-TE tunnel. The other options address unrelated aspects: BGP timer tuning only affects BGP peering convergence, VRFs provide traffic segmentation rather than failure protection, and targeted LDP sessions manage LDP neighbor relationships rather than link-failure backup path selection.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!