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  1. Senior Member
    Join Date
    Dec 2014

    Default TCP/UDP port 646

    A bit of confusion i have here

    Is the router that initiate the ldp session dependent on whether it is the highest loopback id or is it based on the port number 646?
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  2. Resident Underachiever EdTheLad's Avatar
    Join Date
    May 2005
    Globe trotter, nfa

    CCNP/CCIP/IE Written
    LDP by default advertises its RID as the transport address, the RID can be explicitly configured or the highest loopback, or if no loopback highest interface ip. The highest ip address between peers becomes active for the tcp session, the active side will have a src port of 646.
    Networking, sometimes i love it, mostly i hate it.Its all about the $$$$
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