Refer to the exhibit. An engineering team must update the network configuration so that data traffic from router A to router D continues in case of a network outage between routers B and C. During a…

While matching IGP and LDP hello timers can aid faster convergence, it does not guarantee that LDP will be ready on a new path precisely when the IGP switches to it.

LDP Session Protection is used to maintain existing LDP sessions and labels through control plane restarts or brief IGP adjacency flaps, not to ensure LDP readiness on newly converged IGP paths.

BFD accelerates link failure detection for IGPs, which can speed up IGP convergence, but it does not address the synchronization issue between IGP and LDP on a new path.

The symptom of IGP switching to an alternate path but label forwarding not occurring indicates that the IGP has converged faster than LDP on the new path, leading to traffic blackholing. Enabling MPLS LDP IGP Synchronization on all routers forces the IGP to delay advertising a link's reachability until LDP has fully established an adjacency and exchanged labels over that link, ensuring MPLS traffic can be forwarded immediately when the IGP selects the path.