300-320 Question #600: Real Exam Question with Answer & Explanation

The correct answer is C: Router reflector. A Route Reflector (RR) eliminates the iBGP full-mesh requirement by acting as a central point that reflects routes to all iBGP clients. Clients only need a single iBGP session with the RR instead of sessions with every other iBGP peer, dramatically reducing the number of neighbor

Question

An engineer is designing an IBGP solution and must mitigate the full-mesh requirement without increasing the number of BGP neighbor relationship achieve this goal?

Options

AConfederation
BAS path prepend
CRouter reflector
DDirectly connected IBGP peers

Explanation

A Route Reflector (RR) eliminates the iBGP full-mesh requirement by acting as a central point that reflects routes to all iBGP clients. Clients only need a single iBGP session with the RR instead of sessions with every other iBGP peer, dramatically reducing the number of neighbor relationships. Confederation (A) also breaks full-mesh but does so by creating sub-ASes, which introduces additional eBGP-like peering between confederation members and increases administrative complexity. AS path prepend (B) is a traffic engineering tool, not a topology solution. Directly connected iBGP peers (D) does not address full-mesh reduction.

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