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Overview of Solution U-PEs and S-PEs establish T-LDP adjacencies to build PW overlay network topology U-PEs assume role as active or passive to initiate signaling MS-PW TLV provides information for U-PEs and S-PEs to process MS-PW signaling Unique key Direction Peer PW ID allows backward compatibility and eliminates the need for global PW id MS-PW established through LDP by sending LM to one or more T-LDP peers in succeeding direction Intelligent choice of “next hop S-PE” through local policies, BGP or other routing topology information |