What could be the cause?

LDP neighbors are discovered but no LDP session is established. What could be the cause?

LDP neighbors are discovered but no LDP session is established. What could be the cause?

A.
There is no TCP connectivity between the neighbor loopback addresses.

B.
There is an LDP/TDP protocol mismatch.

C.
There is no TCP connectivity between neighbor’s adjacent interfaces.

D.
MPLS is not enabled on neighbor router.



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