Refer to the exhibit. A large enterprise is migrating its network to use MPLS VPNs between different business divisions. Within the core, routes are shared between the routers using OSPF, and each connected link maintains an MPLS neighbor relationship. Which action must the migration team take so that LDP neighbor relationships are maintained if a directly-connected link goes down?

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B. Implement LDP sync between routers that are directly connected to each business division. LDP synchronization (LDP Sync) ensures that LDP only establishes neighbor adjacencies and starts distributing labels on an interface after the IGP (OSPF in this case) has fully converged and formed its own adjacency over that same interface, preventing traffic blackholing during IGP reconvergence when a link fails or recovers.

Answer

A. Implement targeted LDP sessions between directly connected routers and between routers that Targeted LDP sessions are used for LDP adjacencies between non-directly connected routers or over tunnels and do not directly address the synchronization issue between LDP and IGP convergence on a directly connected link.

Answer

C. Implement LDP sync between routers that are directly connected to each business division. This option is identical to option B; however, B is designated as the correct answer.

Answer

D. Implement targeted LDP sessions between routers that are directly connected to each business Targeted LDP sessions are for non-directly connected LDP neighbors and are not designed to synchronize LDP and IGP state on a direct link experiencing failures.

Refer to the exhibit. A large enterprise is migrating its network to use MPLS VPNs between different business divisions. Within the core, routes are shared between the routers using OSPF, and each…

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