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  • 1.  MPLS no-cspf question

    Posted 04-23-2015 22:39

    Hi all,

     

    I have a question about MPLS configuration

     

    I have setup a simple lab for this in my MX80

     

    CE1---R1---R2---CE2

     

    On R1, R2, I use ospf for the igp and advertise the lo0 to each other. iBGP for signaling and RSVP MPLS on top of it.

    I manually configure the LSP and everything is fine because I just simply copy the config from Juniper KB.

     

    However, the LSP was down after the above setup.

     

    I found some passage and configure no-cspf under protocol mpls. After that, all connection goes up.

     

    I am wondering why no-cspf will bring the connection up. Do I need to configure this once I manually configure the LSP? CSPF can be enabled if let the router calculate the LSP?

     

    Thanks!

     



  • 2.  RE: MPLS no-cspf question
    Best Answer

    Posted 04-23-2015 22:54

    Hi,

     

    for CSPF to work, you need to populated the traffic engineering database (TED). With IS-IS, traffic-enigineering extensions are enabled per default in JUNOS. However, with OSPF you have to configure "set protocols ospf traffic-engineering" to populate the TED. Alternatively you can disable CSFP like you did.

     

    Cheers,

    Carsten



  • 3.  RE: MPLS no-cspf question

    Posted 04-24-2015 00:27

    It works!

    Thanks a lot!