> Did not know that both had stopped. Conflicting IP addresses was just a > suggestion. May not be the problem at all. With bonding, breaking one > might break both down at the MAC level ... > > Hmmm ... which bond mode are you using? Why mode 4 of course. > >> The box with the problem just so happens to be the only box using >> bonding, 802.1q and a four port Qlogic Netxen NIC. I think the >> chances of there being a problem between these three more likely than >> some 'ghost' boxes getting assigned the same ip addresses when I am >> the only admin around. > > If you are the only admin, then its not that likely. Then again, I once > had a power spike reset a wireless router on my network without me > knowing. Default settings were close by not quite right, and it took me > a couple of days to track down the problem :-( Too bad there are no defaults that use the subnet assigned to the school or the 192.168.0.0/16 (no, not my idea - inherited) > > If it was working, then suddenly stops, then something must have > changed. I gather you have some configuration and change management > system in place? Backups of conf files? > Hahaha, that was the best part. It just stopped. And stayed that way too after a reboot, reboot of switches and only started working again when I ran tcpdump for some reason. But another colleague did find this in the iLo report: Repaired Network 07/06/2010 12:35 07/06/2010 12:00 2 Network Adapters Redundancy Reduced (Slot 10, Port 3) Repaired Network 07/06/2010 12:35 07/06/2010 12:00 2 Network Adapters Redundancy Reduced (Slot 10, Port 4) Repaired Network 07/06/2010 12:35 07/06/2010 12:00 2 Network Adapters Redundancy Reduced (Slot 10, Port 1) Repaired Network 07/06/2010 12:01 07/06/2010 12:00 1 Network Adapter Link Down (Slot 10, Port 2) Time to ask the HP chap what this is all about.