I'm having a weird issue with a 275. Also have a TAC case open.
I have a 275 mounted out on the scoreboard of our school's softball field. This connects back to the network via a separate p2p wireless link. This has worked well, up until now.
I recently purchased two new controllers (7220) and loaded 6.5.0.0 on to them. The reason is to support some 315s which I also just purchased. I will be moving all of my APs to these controllers.
I moved the 275 to the new controllers/software. It booted up ok, loaded the new software and rebooted successully. However, it only stayed up for about 2 minutes and went "down". After being down for around 45 minutes it came back up again, but once again just for 2 minutes. This pattern repeats over and over again.
One of the times while it was up, I moved it back to my old controller/software. It worked fine there, with no issues at all.
I removed the 275 and brought it to my office, plugged it directly into a POE switch there and upgraded it again. It does not display the same behaviour when connected directly to a POE switch. It works fine on the 6.5 software and new controller.
So, it would seem that the 6.5 software does not "like" the POE injector I have out on the softball field scoreboard, however 6.4.3.8 does "like" it. At least that's what I'm assuming.
The question I have, is that why would one version of software be ok with the injector and another not be ok with it? Or is there something else potentially happening?