Hi, There were reports here in the list that some BFD peers do not allow connections from non-standard ports and bird do not choose source port specifically. So you might need to tune your sysctl like that:
net.ipv4.ip_local_port_range = 49152 65535 Not sure if this is the case, but I would try that first. Regards, Alexander On Tue, Jan 16, 2024 at 9:15 AM Lukas Haase via Bird-users <bird-users@network.cz> wrote: > > Hello, > > My BFD session between bird work fine but the ones but the ones to VyOS > (which uses FFR) just won't connect: > > # birdc show bfd sess > BIRD 2.0.8 ready. > bfd1: > IP address Interface State Since Interval Timeout > 172.20.215.131 --- Init 10:39:14.183 1.000 10.000 > 172.20.215.130 --- Up 10:42:03.901 0.100 0.500 > > 172.20.215.131 is here a VyOS box and its FFR config looks like: > > ! > bfd > peer 172.20.215.129 multihop local-address 172.20.215.131 > detect-multiplier 10 > transmit-interval 100 > receive-interval 100 > exit > ! > exit > ! > end > > > For reference, my bird config is trivially: > > protocol bfd > { > interface "local-ibgp" { > min rx interval 100 ms; > min tx interval 100 ms; > idle tx interval 500 ms; > multiplier 10; > }; > neighbor 172.20.215.130 local 172.20.215.129 multihop; > neighbor 172.20.215.131 local 172.20.215.129 multihop; > } > > > I have turned off firewall. What else could go wrong? > > > Thanks, > Luke