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What's the purpose of P2MP on LDP ?

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  • 1.  What's the purpose of P2MP on LDP ?

    Posted 08-14-2020 00:12
      |   view attached

    Hi,

     

    I got confused on the function of "P2MP". What's it's real purpose ?

    Regarding to my backbone, I don't see any information what is relevant about P2MP.

    My network just need LDP Label with RSVP backup-LSP. 

     

    Or something need it to share routes. Like BGP L3 VPN or L2circuit ?

     

    > show ldp p2mp tunnel

    {master}

     

    > show ldp database p2mp
    Input label database,192.168.146.6:0--192.168.144.2:0
    Labels received: 44

    Output label database,192.168.146.6:0--192.168.144.2:0
    Labels advertised: 44

    Input label database,192.168.146.6:0--192.168.145.2:0
    Labels received: 44

    Output label database,192.168.146.6:0--192.168.145.2:0
    Labels advertised: 44

    Input label database,192.168.146.6:0--192.168.146.2:0
    Labels received: 44

    Output label database,192.168.146.6:0--192.168.146.2:0
    Labels advertised: 44

    Input label database,192.168.146.6:0--192.168.146.8:0
    Labels received: 44

    Output label database,192.168.146.6:0--192.168.146.8:0
    Labels advertised: 44

    Input label database, 192.168.146.6:0--192.168.146.9:0
    Labels received: 31

    Output label database,192.168.146.6:0--192.168.146.9:0
    Labels advertised: 44

    Input label database,192.168.146.6:0--192.168.147.2:0
    Labels received: 45

    Output label database,192.168.146.6:0--192.168.147.2:0
    Labels advertised: 45

    Input label database,192.168.146.6:0--192.168.128.6:0
    Labels received: 44

    Output label database,192.168.146.6:0--192.168.128.6:0
    Labels advertised: 44

    Input label database,192.168.146.6:0--192.168.131.10:0
    Labels received: 43

    Output label database,192.168.146.6:0--192.168.131.10:0
    Labels advertised: 46

    Input label database,192.168.146.6:0--192.168.131.11:0
    Labels received: 43

    Output label database, 192.168.146.6:0--192.168.131.11:0
    Labels advertised: 45

     

    Thanks

    Cloud


    #ldp

    Attachment(s)

    rtf
    Configuration.rtf   2K 1 version


  • 2.  RE: What's the purpose of P2MP on LDP ?
    Best Answer

    Posted 08-14-2020 03:10

    Hello,

     


    @Cloud wrote:

     

    My network just need LDP Label with RSVP backup-LSP. 

     

     


     

    If You followed this example https://www.juniper.net/documentation/en_US/junos/topics/topic-map/ldp-configuration.html#id-configuring-ldp-link-protection and enabled P2MP LDP, then this is expected.

    Do You have a line in Your config that reads "set protocols ldp p2mp"?

    HTH

    Thx

    Alex

     

     

     

     

     

     

     



  • 3.  RE: What's the purpose of P2MP on LDP ?

    Posted 08-16-2020 21:18

    Hi Alex,

     

    As your URL, I think we need it since we enable basic LFA+Dynamic RSVP LSP.

    So, my configuration is included this link.

     

    Best regards,

    Cloud