Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 275

With Internal BGP, there is a requirement for all peers to be logically fully meshed, where all IBGP routers must peer with all other IBGP routers. For scaling purposes, there are two mechanisms that were developed to bypass this requirement. What are they? (Choose two.)

Answer options

• A. Confederations
• B. IBGP to EBGP route redistribution
• C. BGP peer filtering
• D. Route reflectors.

Correct answer: A, D

Explanation

The correct answers are Confederations and Route reflectors because they both allow for a reduction in the number of peer connections required in an IBGP environment. Confederations divide the IBGP network into smaller, manageable segments, while Route reflectors enable routers to share routing information without requiring a full mesh, which is not the case for the other options.