Hello, is there something special to configure, for bird ospf knowns, which IP addresses belong to the one neighbour router? I have bird in ospf area 2. The ospf peer is in area 2 and in area 0. bird ospf learns all prefixes and routes from that peer and shows them in its lsadb. However, it copies no routes to the kernel routing table. I assume, bird does not understand, that this peer is the gateway. Can someone please have a look at the "topology" output and give me a hint about the "unreachable" notices! 93.189.172.3 is the ospf id of the peer, according to its IP address in area 0. 93.189.172.85 is birds IP address. The peer has .86 in that network. Regards, Roger. bird> show ospf topology all area 0.0.0.2 router 93.189.172.3 unreachable network 93.189.172.84/30 metric 10 router 93.189.172.85 distance 0 router 93.189.172.3 metric 10 network 93.189.172.84/30 dr 93.189.172.3 unreachable router 93.189.172.85 router 93.189.172.3