All right. I solved this problem after hours of googling. It is caused by the limit of enteries in IPv6 kernel routing table, which is defined in /proc/sys/net/ipv6/route/max_size and is 4096 by default. But we have more than 4096 IPv6 routes, so it crashed when adding 4097th entry into kernel table. But it also took down OSPF communication. Maybe bird should check this limit and tell more interesting error message? Thanks. Petr Dne 10.12.2010 14:47, Petr Šťastný napsal(a):

Hello,

I have bird6 (1.2.5) running OSPF and BGP. Everything works perfectly until I enable BGP protocol:

bird> enable XXX

10-12-2010 14:37:52 <INFO> Enabling protocol XXX 10-12-2010 14:37:54 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:37:54 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:37:54 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:37:54 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:37:54 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:37:54 <WARN> ... 10-12-2010 14:38:02 <ERR> OSPF: Socket error: Network is unreachable 10-12-2010 14:38:12 <ERR> OSPF: Socket error: Network is unreachable 10-12-2010 14:38:12 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:12 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:12 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:12 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:12 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:12 <WARN> ... 10-12-2010 14:38:22 <ERR> OSPF: Socket error: Network is unreachable 10-12-2010 14:38:25 <WARN> Netlink: No such process 10-12-2010 14:38:25 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:25 <WARN> Netlink: No such process 10-12-2010 14:38:25 <WARN> Netlink: Cannot allocate memory 10-12-2010 14:38:25 <WARN> Netlink: No such process

It is interesting that I also have another router with bird6 running OSPF (the same network) and BGP peer without any problem.

The router has 5 GB of free memory.

bird> show memory BIRD memory usage Routing tables: 46 kB Route attributes: 4952 B Protocols: 72 kB Total: 151 kB

Any idea?

Thanks

Petr Stastny