Which two statements about route reflectors are true? (Choose two.)

Question

Options

• ARoutes received from nonclient peers are reflected to route reflector clients as well as nonclient
• BRoutes received from nonclient peers are reflected to route reflector cluster as well as OSPF
• CIf a router received an iBGP route with the originator-ID attribute set to its own router ID, the route
• DRoutes received from a route reflector client is reflected to other clients and nonclient peers.
• EIf a route reflector receives a route with a cluster-list attribute containing a different cluster ID, the

• A
  3% (1)
• B
  3% (1)
• C
  95% (37)

Explanation

Route Reflectors (RR) operate under specific reflection rules to prevent iBGP routing loops. (D) is true: routes received from a client peer are reflected to all other clients AND all non-client peers - this is the core function of the RR for client-originated routes. (C) is true: the ORIGINATOR_ID attribute is set to the originating router's BGP router-ID when a route is first reflected. If the RR receives a route with an ORIGINATOR_ID matching its own router-ID, it silently discards the route to prevent loops. Choice A is incorrect: routes received from non-client iBGP peers are only reflected to clients, NOT to other non-clients (that would violate the iBGP split-horizon rule that the RR is designed to relax selectively). Choice E is also incorrect: a cluster-list containing a DIFFERENT cluster ID does NOT cause the route to be dropped - only a matching cluster ID would.

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