Hello, I've been playing around with BIRD and OSPF for a while now and ran across an error I don't quite understand, while trying to get BIRD to advertise ip addresses on the loopback interface on a debian 10 server. # bird.conf: debug protocoll all; protocol device { scan time 10; }; protocol ospf v3 ospf_ip4 { ipv4 { export filter accept; import filter accept; import keep filtered; }; area 0.0.0.0 { interface "lo", "dummy*" { stub yes; }; }; }; # ip addr show dev lo 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet 10.50.0.1/32 scope global lo valid_lft forever preferred_lft forever inet6 fe80::1/128 scope link valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever Please note that loopback has a ipv6 link local address to get bird to recognize the interface. In theory, this should advertise 10.50.0.1/32 to other ospf routers, yet it doesn't and BIRD complains about LSAs with an invalid prefix This should advertise 10.50.0.1/32 to other routers and add the respective entries to the LSADB, yet bird starts complaing about an invalid LSA: "ospf_ip4: Invalid prefix in LSA (Type: 2001, Id: 0.0.0.0, Rt: 10.50.0.1)", I have attached the debug output of bird. Any help would be appreciated.