Salut fellow bird users, we recently tried to simplify the bfd configuration and replaced our existing configuration with the following: -------------------------------------------------------------------------------- # Using BFD virtually everywhere, enable it globally protocol bfd { } ... protocol bgp incoming_r3ge { local as myas; direct; bfd on; ... -------------------------------------------------------------------------------- And now bird repots every second the following message: -------------------------------------------------------------------------------- 2024-08-08 11:00:15.727 <ERR> bfd1: Socket error: Destination address required -------------------------------------------------------------------------------- The router has various interfaces, some tunnel, some wireguard tunnel, some bridges, etc. and I have a bit trouble to spot, what is causing the error message. All interfaces that are used for BGP obviously have an IP address , but many bfd sessions are actually down that I'd expect to be up: -------------------------------------------------------------------------------- bird> show bfd sessions bfd1: IP address Interface State Since Interval Timeout 2a0a:e5c0:10:1:fa5e:3cff:fe2d:eb04 eth0 Down 2024-08-06 1.000 0.000 2a0a:5480:5:2::1 or3ge Down 2024-08-06 1.000 0.000 2a0a:e5c0:10:1::123 eth0 Up 2024-08-06 0.100 0.500 2a0a:e5c0:10:1:fa5e:3cff:fe2d:eafc eth0 Down 2024-08-06 1.000 0.000 2a0a:e5c0:32:1::1 oserver121 Down 2024-08-06 1.000 0.000 2a0a:e5c0:142:2::2 iserver138 Down 2024-08-06 1.000 0.000 2a0a:e5c0:142:3::2 iapured2 Down 2024-08-06 1.000 0.000 2a0a:e5c0:43:2::1 oserver138 Down 2024-08-06 1.000 0.000 2a0a:e5c0:142:1::2 ir3ge Down 2024-08-06 1.000 0.000 2a0a:e5c0:10:1::141 eth0 Up 2024-08-06 0.100 0.500 2a0a:e5c0:10:1::122 eth0 Up 2024-08-06 0.100 0.500 bird> -------------------------------------------------------------------------------- (excluding the two 2a0a:e5c0:10:1:.. ones, they don't have bfd enabled at the moment) Is using protocol bfd {} actually *not* supported? Best regards, Nico -- Sustainable and modern Infrastructures by ungleich.ch