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  • 1.  Which is the best method to make fast failover RSVP path?

    Posted 01-06-2025 07:49

    Hi all,

    Currently i have test RSVP tunnel failover **link down** (in my virtual lab before i test on actual production) and compare with two method as per below. If i'm use BFD (method 1) , when i do continue ping then i can see timeout around 3 second during failover. But if im use "method 2" i get 4 timeout during failover. So my question which is the good mehod in real production environment in your experience?  Is it possible we can make  1 timeout only?

    1.) Using BFD in RSVP with enable link-protection knob under protocol rsvp.

    2.) Not use BFD but just change hello-interval value to "1" under protocol rsvp interface with link-protection enable.

    Thanks and appreciate any feedback



  • 2.  RE: Which is the best method to make fast failover RSVP path?

    Posted 01-28-2025 18:18

    Did you also enable "fast-reroute" or "link-protection" or "node-link-protection" on an [protocols mpls label-switched-path $name]?

    AFAIK the "link-protection knob under protocol rsvp" is a requirement for one of 3 commands from my previous line to work. AFAIK by itself it doesn't do much.


    Original Message


  • 3.  RE: Which is the best method to make fast failover RSVP path?

    Posted 01-29-2025 13:31

    Do you have a secondary standby defined?  Standby switchover should happen in miliseconds.  

    https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/standby-edit-protocols-mpls-label-switched-path-secondary-ex-series.html

    We have found that in practice that we needed to enable aggressive optimization to stop the secondary LSP using any of the same links as the primary.  You lose some other features but for us the instant switchover was more important

    https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/optimize-aggressive-edit-protocols-mpls.html


    Original Message


  • 4.  RE: Which is the best method to make fast failover RSVP path?

    Posted 01-30-2025 20:24

    Hi,

    Below is my config that i test in my lab. The failover improve after i change the "hello-interval" value to 1. But i'm not sure whether it's best practice in real production network or not? Appreciate some feedback

    MX304-1> show configuration protocols rsvp interface ge-0/0/1.2212     
    hello-interval 1;
    link-protection;

    label-switched-path mx304-1-to-PE7-JNPR {
        no-install-to-address;
        from 10.251.2.1;
        to 10.251.2.9;
        ldp-tunneling;
        install 192.0.2.2/32;
        inactive: oam {
            bfd-liveness-detection {
                minimum-interval 3;
                multiplier 3;
                transmit-interval {
                    minimum-interval 3;
                }
                failure-action teardown;
            }
        }
        node-link-protection;
        adaptive;
        inactive: fast-reroute;
        primary MX304-1->PE5->PE7;
        secondary MX304-1->PE5->IGP {
            standby;
        }
    }                        


    Original Message