Free Juniper JN0-683 Actual Exam Questions - Question 12 Discussion
You are troubleshooting a DCI connection to another data center The BGP session to the provider is
established, but the session to Border-Leaf-2 is not established. Referring to the exhibit, which
configuration change should be made to solve the problem?
Maybe B, deleting advertise-external could stop the UNDERLAY group from leaking incorrect routes that might block the BGP session with Border-Leaf-2. It’s worth trying if the external routes cause confusion.
It’s D, removing accept-remote-nexthop usually fixes sessions blocked by unrecognized next-hops.
It’s D because accept-remote-nexthop can block BGP sessions if the remote next-hop isn’t recognized. Removing it lets the overlay group accept routes from Border-Leaf-2 properly.
It’s B for me. The UNDERLAY group probably doesn’t need advertise-external since it can cause routing issues or session problems if it’s improperly set. Removing that could clear up why Border-Leaf-2’s BGP session isn’t coming up. Also, the UNDERLAY group usually handles internal connections, so advertising external routes isn’t necessary and might be messing with the neighbor relationship. Options A and C seem unrelated to the session problem, and D is less likely since accept-remote-nexthop would only cause issues if the neighbor advertised next-hops outside the subnet, which we don’t see cl
Option B might fix it since advertise-external isn’t needed for UNDERLAY here and could cause issues with the neighbor session not coming up properly.
Looks like option D makes sense—removing accept-remote-nexthop on the OVERLAY group should help the BGP session with Border-Leaf-2 come up.