Which two statements about IBGP multipath are true? (Choose two.)
A.
The IGP metric of the BGP next hop can be different from the best-path IGP metric if you
configure the router for unequal-cost IBGP multipath.
B.
The IGP metric of the BGP next hop must be the same as the best-path IGP metric.
C.
The equivalent next-hop-self is performed on the best path from among the IBGP multipaths
before it is forwarded to external peers.
D.
The path should be learned from an external neighbor.
E.
The router BGP process must learn the path from a confederation-external or external neighbor.
F.
The router BGP process must learn the path from an internal neighbor.
Answer B looks much better than A.
Next hops must be DIFFERENT, but IGP metrics of all these next hops must be the SAME.
B is correct. Simulated it.
A and F are correct. Please see the following:
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13753-25.html#bgpmpath
A is correct because of the use of the words unequal-cost IBGP multipath as per John Doe’s link above.
B is not STRICTLY correct because if you use unequal-cost IBGP multipath the metrics can be different meaning B is wrong.
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13753-25.html#bgpmpath
“The IGP metric to the BGP next hop should be equal to the best-path IGP metric, unless the router is configured for unequal-cost iBGP multipath.”
This is a classically pedantic use of words to confuse.