[BFD] BFD is Not working after system reboot.

16 Jul 2020

      Hello.
BFD is Not working normally.
My configuration is shown below.

OS: Ubuntu 18.04
Kernel: 4.15.0-54-generic
BIRD ver: 1.6.8
==================================
protocol bfd {
        multihop {
            min rx interval 300 ms;
            min tx interval 300 ms;
            multiplier 3;
        };
}

protocol bgp as1 {
        import all;
        export all;

        local ~ as ~;
        neighbor ~  as ~;
        enable route refresh off;
        hold time 90;
        bfd on;
}

protocol bgp as2 {
        import all;
        export all;

        local ~ as ~;
        neighbor ~  as ~;
        enable route refresh off;
        hold time 90;
        bfd on;
}
==================================

After system reboot(# shutdown -r now), BGP neighbor is established, But
BFD sessions are stuck in 'INIT' status. And BIRD does not send BFD packets.
BFD sessions have recovered after restart protocol bfd1(# birdc restart
bfd1).

Is it a normal situation?
I think BFD has to start the mechanism after BGP neighbor is UP.
Is there any missing part of my configurations?
Please check it.

Regards

[BFD] BFD is Not working after system reboot.

seunghwan hwang