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