Intermittent network flappage (ACLs)? Maybe a tcpdump would have provided more insight, than just rebooting the servers...

On 3/16/06, Bill Perez <billieperez at gmail.com> wrote:

Hi,

I have been running Hobbit 4.2.1 on Fedora Core 4 for several months now. Today, in the middle of a normal day when there was supposedly nothing going on that would have caused this, about 30 servers started reporting red connectivity, then a few minutes later would switch back to green, then back to red again - causing very many alerts to go out. There doesn't seem to be anything similar about the servers that this was happening to, it was just random. I was able to ping these servers from the hobbit server, so it didn't seem like there was really a connectivity issue for hobbit getting to them. I restarted the hobbit service, rebooted the server, checked the logs (nothing was logged the time it started happening). I then moved all the logs to a different directory and restarted the service. After about 1/2 hr things went back to normal. Does anyone know what might cause this strange behavior and anything to do to prevent it from happening in the future.

Thanks in advance, Billie