We have an odd problem and I am looking to see if anyone else has seen this.
We have two 3560G-48PS switches running 12.2(35)SE, each has 12 or so 1142 APs connected. These are connected to a 1500kVa UPS which is in turn connected to emergency power that can switch to generator. When we lose power the UPS takes over for about 1 or 2 seconds before the generator kicks in. When this happens the switch loses connection to all of the APs. The switch DOES NOT reboot, and it still powers the APs (though on a sh power inline these now show as ieee PD). If I do a "power in never" then switch back to "power inline auto" it then will not even power the APs back up. A power cycle or a "reload" on the switch corrects the issue.
This happens on two separate switches, we have seen it with two different model UPS units. It also does it when we switch from generator back to house power.
We are able to reproduce the issue by just quickly pulling the plug on the UPS and plugging it back in.
A sh log shows nothing but the ports disconnecting.