You are using a Layer 3 VPN to connect two customer sites. The VPN routes for the customer networks appear as hidden in the bgp.l3vpn.0 routing table on the PE routers. What is causing this problem?
A.
The routes use overlapping IP addresses.
B.
There is a routing loop in the service provider backbone.
C.
There is not an established MPLS LSP between the two PE routers.
inet.3 is used to resolve BGP next hops such in the case of a L3VPN. inet.3 is populated by LDP and RSVP , thus an LSP between the PE must be established
Since learning is taking place this rules out the rest and overlap isn't something a route would get hidden by. The fact that there is no data-path, that being the LSP in this case does make it hidden/unusable.
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