You are facing BGP scaling issues and decide to add dedicated route reflectors to your network. You notice that VPN routes are not being advertised by your route reflectors.Which three actions can you take to solve this? (Choose three.)
A.
Add a static default route to inet.3 and/or inet6.3 on the route reflectors.
B.
Add a full mesh of MPLS LSPs between all of the route reflectors.
C.
Add MPLS LSPs between the route reflectors and their client routers.
D.
Add a static default route to inet.3 and/or inet6.3 on all of the client routers.
E.
Use rib-groups to add IGP routes to inet.3 and/or inet6.3 on the route reflectors.
isn’t it A, D and E right ?
i was wrong -> A,C,D is correct!
You mean A, C and E.
i think it should be B, C and D
in MPLS we need full mesh between RRs to make all routes advertised through the network
So what’s the final answer?
The answer is A,C,E. It mention the posible ways to resolve the problem of hidden routes when the RR is not in the forwarding path.
When the RR receives a route of a client, the RR will try to resolve the protocol next-hop of the BGP route looking the inet.3, as the RR is not in the forwarding path there will not be any entry in inet.3 and the route will be hidden. To solve this problem you can copy the inet.0 to the inet.3, make the RR to resolve in the inet.0, add LSPs to all PEs or install a default route in inet.3.