Hello, I have two OSPF protocols, one for IPv4 and one for IPv6. I’ve set the lo interface for both, but it only shows up for IPv4: protocol ospf ospf_ipv4 { merge external; ipv4 { import all; import keep filtered; import limit 200 action block; import filter { if (net ~ [ 0.0.0.0/0 ]) then { reject; } else { igp_metric = ospf_metric1; accept; } }; export all; export filter { if (proto = "kernel_grt_ipv4" || proto = "direct1") then { ospf_metric2 = 64; ospf_tag = 1336561914; accept; } else reject; }; }; area 0.0.0.0 { interface "lo" { stub; }; include "/etc/bird.lag-*.conf"; interface "wg0" { cost 200; }; }; }; protocol ospf v3 ospf_ipv6 { merge external; ipv6 { import all; import keep filtered; import limit 200 action block; import filter { if (net ~ [ ::/0 ]) then { reject; } else { igp_metric = ospf_metric1; accept; } }; export filter { if (proto = "kernel_grt_ipv6" || proto = "direct1") then { ospf_tag = 1336561914; accept; } else reject; }; }; area 0.0.0.0 { interface "lo" { stub; }; include "/etc/bird.lag-*.conf"; interface "wg0" { cost 200; }; }; }; edge03-stolon ~ # birdc BIRD 2.15.1 ready. bird> show ospf interface ospf_ipv6 "lo" ospf_ipv6: bird> show ospf interface ospf_ipv4 "lo" ospf_ipv4: Interface lo (45.91.126.241/32) Type: nbma Area: 0.0.0.0 (0) State: Waiting (stub) Priority: 1 Cost: 10 ECMP weight: 1 Hello timer: 10 Poll timer: 20 Wait timer: 40 Dead timer: 40 Retransmit timer: 5 Designated router (ID): 0.0.0.0 Designated router (IP): 0.0.0.0 Backup designated router (ID): 0.0.0.0 Backup designated router (IP): 0.0.0.0 It looks like a bug to me, but perhaps I missed something. -- Alarig