300-410 Question 147
Single answerIn a BGP network, a route reflector is configured to reduce the number of iBGP peerings. When a route reflector receives a route from a non-client iBGP peer, what is the expected behavior when propagating this route?
- A
The route reflector propagates the route to all client peers only.
- B
The route reflector propagates the route to all non-client peers only.
- C
The route reflector propagates the route to both client and non-client peers.
- D
The route reflector does not propagate the route to any peers.
Show answer and explanation
Correct answer: A
Explanation
In BGP route reflection, a route reflector is designed to reduce the number of iBGP peerings while maintaining loop-free routing. When it receives a route from a non-client peer, it propagates the route only to its client peers. This behavior avoids the formation of routing loops in the iBGP topology and adheres to the rules of BGP route reflection.
- A. Correct.
Correct. A route reflector propagates routes received from non-client peers to client peers, but not to other non-client peers, as per BGP route reflection rules.
- B. Incorrect.
Incorrect. A route reflector does not propagate routes from a non-client peer to another non-client peer to avoid routing loops.
- C. Incorrect.
Incorrect. A route reflector cannot propagate a route received from a non-client peer to both client and non-client peers due to BGP route reflection rules that prevent loops.
- D. Incorrect.
Incorrect. A route reflector still propagates routes to client peers if received from a non-client peer, so it does not discard the route entirely.