300-320 · Question #661
Which two design failures will result in clients receiving duplicate copies of the same route?
The correct answer is B. Clients having sessions with reflectors in several clusters C. Clients having IBGP sessions with other clients. In BGP route reflector (RR) design, two flaws cause duplicate route delivery. (B) If a client has IBGP sessions with reflectors in multiple clusters, each cluster will independently reflect the same route to that client, resulting in duplicates. (C) If clients have direct IBGP…
Question
Which two design failures will result in clients receiving duplicate copies of the same route?
Options
- AClients not having sessions with all reflectors in a cluster
- BClients having sessions with reflectors in several clusters
- CClients having IBGP sessions with other clients
- DModification of route BGP attributes on route reflectors before reflecting
- EHaving confederations configured in parallel to route reflectors
How the community answered
(42 responses)- A12% (5)
- B64% (27)
- D19% (8)
- E5% (2)
Explanation
In BGP route reflector (RR) design, two flaws cause duplicate route delivery. (B) If a client has IBGP sessions with reflectors in multiple clusters, each cluster will independently reflect the same route to that client, resulting in duplicates. (C) If clients have direct IBGP sessions with each other in addition to receiving routes via their route reflector, they will receive the same route twice - once from the RR and once directly from the peer client. Both failures violate the core principle that a route reflector cluster should be the single source of reflected routes for its clients.
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