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.