Routing

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Ask questions and share experiences about ACX Series, CTP Series, MX Series, PTX Series, SSR Series, JRR Series, and all things routing, including portfolios and protocols.

  • 1.  Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

    Posted 01-09-2012 21:38

    Hi Experts

     

    Whey CSPF (Traffic Engineering Database) is required for MPLS Fast Failover in MPLS? Because as I believe it is required for MPLS traffic engineering (that is link colouring, bandwidth reservation etc).

     

    Thanks for the reply



  • 2.  RE: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

    Posted 01-15-2012 02:29

    Hi Aeroplane,

     

    The detour bypass lsp that is to be used in case of link failure should be adequate to accommodate all TE specs needed by the protected lsp.

     

    BR



  • 3.  RE: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??
    Best Answer

    Posted 01-17-2012 09:26

    Hi

     

    The detour (fast reroute) inherits the link colouring from the protected LSP although bypass LSP (link/node protection) does not. But you can manually specify the link colouring/bandwidth for the detour and bypass LSP. Since link colouring and bandwidth reversation etc requires the CSPF thats why FRR, Link/Node protection needs the CSPF.

     

    HTH



  • 4.  RE: Why CSPF is required for Fast Failover (FRR, Link/Node Protection)??

    Posted 01-17-2012 12:43

    Thanks for both. How we can specify the contrainsts for detours?