> > On Tue, Nov 02, 2010 at 11:00:39AM -0700, Mahlon E. Smith wrote: > > > > I'm running bird 1.2.4 on a series of FreeBSD OSPF routers. > > > > Had a backhoe go through some fiber this morning (really), and was > > surprised to find that bird didn't update routes automatically. > ... > > > > I don't see anything else to add or modify in the config for checking > > interface status -- did I miss something? My anticipated behavior would > > be that a link down would perform a route update. > > Hello > > BIRD currently does not check or use link up/down state. OSPF routers > generally check reachability using HELLO packets, not by reported link > state, although sometimes this is also implemented. Drawback of HELLO > protocol (to check reachability) is that it has some timeout to find > out that the neighbor became unreachable. By default, it is ~ 40 > seconds, But it is possible to configure it to < 10 seconds (see > hello/wait/dead interface options).
I think BIRD really should check link state. Changing HELLO < 10 secs isn't going to make it much better and will also increase load and network bandwidth. Jocke
