[2281610.659683] bird[1016]: segfault at 44 ip 00007ff854953550 sp 00007fff5bb1df70 error 4 in bird[7ff85492d000+57000] That's only thing I've got... Sometimes it works 4-5 months without problem, sometimes it crashes twice a day :/ Bird running as a ospf DR in nbma mode on 4 vlan's system: Debian 6.0 with custom kernel (3.1.1) Dec 9 09:13:02 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 9 09:17:46 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 9 09:18:31 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 9 09:18:33 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 9 09:22:13 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 9 17:18:31 rt-ospf1 bird: OSPF: Bad packet from 172.32.0.97 - bad checksum Dec 13 16:15:54 rt-ospf1 bird: OSPF: Bad packet from 172.33.0.10 - bad checksum Dec 13 19:50:47 rt-ospf1 bird: KIF: Invalid broadcast address 172.31.1.255 for vlan2001 Broadcast address it's now fixed, but it shouldn't segfault bird. Help :(