JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2022) — Question 2

What is the purpose of the cluster-list attribute within a BGP route reflector group?

Answer options

• A. to disable internal cluster re-advertisements
• B. to facilitate loop detection within the route reflector network
• C. to define the router that first advertised the route to the route reflector
• D. to override the router ID value within the cluster

Correct answer: B

Explanation

The correct answer, B, is accurate because the cluster-list attribute helps in identifying and preventing routing loops by keeping track of the clusters through which the route has passed. Options A, C, and D do not correctly describe the role of the cluster-list attribute, as it does not disable re-advertisements, define the original advertising router, or change the router ID.