CCDE: Cisco Certified Design Expert (Practical) — Question 186

Router R1 is a BGP speaker with one peering neighbor over link "A". When the R1 link/interface "A" fails, routing announcements are terminated, which results in the tearing down of the state for all BGP routes at each end of the link. What is this a good example of?

Answer options

• A. fault isolation
• B. resiliency
• C. redundancy
• D. fate sharing

Correct answer: D

Explanation

This scenario exemplifies fate sharing because the BGP routes are dependent on the state of the link; when the link fails, both ends lose their routes. In contrast, fault isolation refers to limiting the impact of failures, resiliency focuses on maintaining service during failures, and redundancy involves having backup systems to prevent outages.