On our BGP session to Route Server 1 (206.108.225.1 & 2001:504:27::d1af:0:1) i have lost the BFD session.
My Juniper router shows the state as "Down".
Is this intentional? An accident of the upgrades? Is my configuration wrong? Anyone else noticing this?
My configuration is an interval of 1000 ms, multiplier 3.
MICE is configured as 500 * 3
tcpdump shows your BFD control packets coming in, but bird is not
responding.
I'm seeing the same issue with 206.108.255.137 (Inteliquent AS 40160) on IPv4 and 2001:504:27:0:0:B7F8::1 (Compudyne, AS47096) on IPv6. Everyone else is consistent between the two route servers.
This thread from 2020 talks about someone having BFD issues after a reboot, which they fixed by restarting BFD in BIRD. That might be something to try if we run out of other ideas: https://www.mail-archive.com/bird-users@network.cz/msg05382.html
Before I try that, have you tried flapping your BGP session?
-- Richard