03-25-2014 07:12 AM
We are doing a big remote rollout of these switches. I now have had 3 of them where it appears POE is not working on. We only have 3 !AP 105s drawing power but the ports are dark. If I do a sh poe interface command the ports that the IAP's are plugged into show (code=24).
GE0/0/22: Administratively Enable, Port status: Off
Maximum power: 30000 mW, Power consumption: 0 mW
Port voltage: 0 mV, Port current: 0 mA
PD class: Class-3, Priority: Low, PSE port status: off, (code=24)
03-25-2014 07:23 AM
Code 24 indicates that there is a "Voltage injection into the port". We're planning to replace the codes with more human understandable code in a upcoming maintenance release.
How are the IAPs cabled up? Are these IAPs already in the ceiling or just on a small patch cord connected to the S1500? If in the ceiling, any chance to bring them down and direct connect the switch on a short patch cord and see if the problem persists. It could indicate an issue with the longer run.
03-25-2014 07:25 AM
The AP's are already mounted in the ceiling, plus these have been deployed to remote locations. I don't have physical access to the equipment. I did have a tech connect the AP's directly to the switch with a small patch cord and we had the same result.
03-25-2014 07:42 AM
Yeah I already have. The first in line tech told me to reset the switch to factory defaults. I can't do it at the moment because the switch is in production. I was just checking to see if anybody out here had run into this issue and had a solution instead of resetting the switch.
03-25-2014 07:49 AM
Have you tried removing the poe-profile and re-applying to the ports in question. That should reset the PoE settings versus doing a factory default. Also, has rebooting had any effect?
Also, we have seen this once before:
But I think the issue was caused by another device (not the APs) sending power down the line. What else might be connected to the switch?
03-25-2014 08:00 AM
The upstream port is connected to a Att router which does have POE enabled. Att manages the router so I cannot change the POE settings on it. What's wierd is we have deployed about 20 of these switches with the same hardware and the same configuration and they have all worked except these 3. So far.......
03-25-2014 08:09 AM
It may not be the router upstream. Besides the APs, what else is attached, any little switches/hubs or other devices? Any possibility you can have everything disconnected but the IAPs and see if the issue disappears then slowly add devices?
03-25-2014 10:30 AM
I had a field tech on location who unplugged patch cords one at a time. POE did eventually start working. We couldn't determine exactly what device was causing this because we had a short time frame to work in. What's wierd is that we plugged everything back in and POE for the access points continued to work. I don't know what to make of it....