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adding BFD to existing IPv6 peering

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  • 1.  adding BFD to existing IPv6 peering

    Posted 11-27-2018 00:54

    HI All,

    Need some advise... I have a couple of MX5 routers which are currently peering via several devices, i.e not directly connected.

     

    The peering is currently up and stable.. Is it possible to add BFD without restarting the peering?

     

    I have added the following config on both sides;

     

    set protocols bgp group outside-outside-ipv6 neighbor 2a00:xxx:3::xx traceoptions file bgp-bfd
    set protocols bgp group outside-outside-ipv6 neighbor 2a00:xxx:3::xx traceoptions flag bfd detail
    set protocols bgp group outside-outside-ipv6 neighbor 2a00:xxx:3::xx bfd-liveness-detection minimum-interval 300
    set protocols bgp group outside-outside-ipv6 neighbor 2a00:xxx:3::xx bfd-liveness-detection session-mode multihop

     

    Though unfortunatly both sides shows the exact same output of Admindown state;

     

    law@rt1..net# run show bfd session extensive                                              
                                                      Detect   Transmit
    Address                  State     Interface      Time     Interval  Multiplier
    2a00:xxx:3::xx        Down                     0.000     2.000        3   
     Client BGP, TX interval 0.300, RX interval 0.300
     Local diagnostic None, remote diagnostic None
     Remote state AdminDown, version 1
     Session type: Multi hop BFD
     Min async interval 0.300, min slow interval 2.000
     Adaptive async TX interval 2.000, RX interval 2.000
     Local min TX interval 2.000, minimum RX interval 0.300, multiplier 3
     Remote min TX interval 0.000, min RX interval 0.000, multiplier 0
     Local discriminator 17, remote discriminator 0
     Echo mode disabled/inactive, no-absorb, no-refresh
     Multi-hop min-recv-TTL 1, route table 0, local-address 2a00:xxx:3::xx
      Session ID: 0x1f60dc

    1 sessions, 1 clients
    Cumulative transmit rate 0.5 pps, cumulative receive rate 0.0 pps

     

    (p.s... no logs captured from the bfd trace)

    Do I have to bounce the session??? Or is it possible to bring up BFD on a BGP session transparently??

     

    Thanks in advance...

     

     



  • 2.  RE: adding BFD to existing IPv6 peering
    Best Answer

    Posted 03-03-2019 05:56

    this can go... my bad.. had bfd port blocked on IPv6 control plane ACL.. doh