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Routing & Switching · Advanced

Targeted LDP (T-LDP)

An LDP session between non-adjacent routers using unicast hellos, used for pseudowires and remote LFA.

Definition

Targeted LDP discovers peers with unicast hellos to a configured address instead of link multicast, so the routers need not be directly connected. Targeted sessions carry service labels for VPWS/VPLS pseudowires and label information for remote LFA tunnels and session protection.

Example

mpls ldp neighbor 10.255.0.9 targeted

Exam tip

Pseudowire (AToM) signaling uses targeted LDP between PEs.

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