We did see something similar and chalked it up to an electrical storm that caused some interesting "brown out" conditions on campus. It appeared that there was a commercial power event, but the switches never completely lost power. For us, it hit 2 WS-C2960X-24PS-L switches on 15.0(2)EX5. We lost several phones and a couple of access points with the same power inline IEEE PD signature. One switch survived a power cycle, the other became a boat anchor RMA'd by Cisco. At the same time, two of the four access points died, one on each switch.
On Tue, Aug 11, 2015 at 9:47 AM, Lee H Badman <[email protected]> wrote: > We’re also going through TAC on this, but I’d like to see if anyone else > is seeing similar in their Cisco switching environment and might have > perspective to share. > > We have an odd, seemingly spontaneous condition where PoE stops working > on a port or two, with only switch reboot bringing it back. Most recent > switch: WS-C3560X-48 on 15.0(2)SE7. > > Problem/discovery flow: > > > - One AP out of several on switch goes down > - Access switch, “show power inline” shows problem AP port has lost > it’s PoE detection signature and is only showing IEEE PD > - All other AP ports are fine > - For problem port, remove PoE (Power Inline Never) then restore PoE > (Power Inline Auto)- Port now dead, will not come back -also do shut/no > shut,makes no difference to condition > - No error disable on port. No obvious reason for switch being out. > - Show environment/post commands reveal no issues with switch power or > power controller > - Only a reboot restores PoE to problem port > > > Seeing the same sort of condition on PoE camera ports as well- seems very > much to be a pure switch issue, nothing to do with AP version/model in this > case. > > Does this ring familiar for anyone? > > Regards, > > Lee Badman > > > > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > -- Randy Mahurin Office of Information Technology Boise State University 1910 University Drive, Boise, ID, 83725-1249 Phone: (208) 426-4003 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
