Hi, You do not need to define neighbors for BGP sessions explicitly in your BFD config. They are created automatically for BGP sessions with BFD enabled. In that case, I suppose, you won't get errors for the missing neighbors. Regards, Alexander On Mon, Apr 29, 2024 at 1:16 PM Fran via Bird-users <bird-users@network.cz> wrote:
Hello there,
I get the error message:
"<ERR> bfd1: Socket error: Destination address required"
(ubuntu 22.04, bird via ppa 2.15.1) running BFD and MP-BGP via IPv6 over wireguard interfaces. Not all BGP neighbors are reachable.
Relevant (I hope) config:
log "/var/log/bird/bird.log" all;
protocol device { }
protocol bfd { accept ipv6 direct; interface "wg_blue*"; interface "wg_green" { multiplier 3; interval 500 ms; }; neighbor 2001:db8:f000::2 dev "wg_green" local 2001:db8:f000::1; neighbor 2001:db8:f000:ffff::2 dev "wg_blue2" local 2001:db8:f000:ffff::1; neighbor 2001:db8:f000:fffc::5 dev "wg_blue1" local 2001:db8:f000:fffc::1; neighbor 2001:db8:f000:fffc::4 dev "wg_blue1" local 2001:db8:f000:fffc::1; neighbor 2001:db8:f000:fffc::3 dev "wg_blue1" local 2001:db8:f000:fffc::1; neighbor 2001:db8:f000:fffc::2 dev "wg_blue1" local 2001:db8:f000:fffc::1; }
protocol bgp EXAMPLE { local as 65001; neighbor 2001:db8:f000::2 as 65044; direct; med metric yes; ipv4 { ... }; ipv6 { ... }; bfd on; }
If I remove the BFD config for the non-established BGP neighbors, the error message disappears (although there are still non-established BFD sessions for established BGP neighbors (BFD not yet confed on the other end)).
At first I did not create neighbor statements for BFD, then I added "dev" and "local" options - no improvement.
No revelations with "debug protocols all".
Any ideas? Thanks a lot!
Best,
fran