350-001 · Question #58
What action will a BGP route reflector take when it receives a prefix marked with the community attribute NO ADVERTISE from a client peer?
The correct answer is D. It will not advertise the prefix to any peers. BGP requires that all BGP peers in the same autonomous system form an iBGP session with all peers in the autonomous system. This is too difficult in many environments. Route reflectors are fully functional iBGP speakers that form iBGP sessions with other iBGP speakers, and they…
Question
What action will a BGP route reflector take when it receives a prefix marked with the community attribute NO ADVERTISE from a client peer?
Options
- AIt will advertise the prefix to all other client peers and non-client peers.
- BIt will not advertise the prefix to EBGP peers.
- CIt will only advertise the prefix to all other IBGP peers.
- DIt will not advertise the prefix to any peers.
How the community answered
(52 responses)- A6% (3)
- B2% (1)
- C4% (2)
- D88% (46)
Explanation
BGP requires that all BGP peers in the same autonomous system form an iBGP session with all peers in the autonomous system. This is too difficult in many environments. Route reflectors are fully functional iBGP speakers that form iBGP sessions with other iBGP speakers, and they also perform a second function - they forward routes from other iBGP speakers to route reflector clients. The route reflector clients and clients form a cluster.
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