PoE problem with non PoE devices on 3650 switches

[marccollard]

We get a lot of PoE error messages:

C3650#show log

Aug  4 10:47:23.223 MET: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/1: PD removed
Aug  4 10:47:23.224 MET: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/1: Power given, but Power Controller does not report Power Good

C3650#show power inline | i 1/0/1
Gi1/0/1   auto   faulty     0.0     n/a                 n/a   30.0

We receive these PoE error messages on switch ports which don't have any PoE devices connected. To be more specific, we see this mainly happening on ports which have very old (10Mbit/HalfDuplex) devices connected.

C3650#sh int status | i 1/0/1
Gi1/0/1                      connected    903        a-half   a-10 10/100/1000BaseTX

These devices don't have any PoE capabilities. However, the switch seems to think they do:

C3650#sh platform ilpower port GigabitEthernet 1/0/1 | i PD Detected
    PD Detected            Yes

Even after the specific port is disconnected (patch cable removed) the switch detects a PoE device...

All system behind these "faulty" ports seem to function propperly.

Anybody an idea how to resolve this?

[Mark Malone]

There is obviously some underlying issue here maybe ios problem but as a quick fix you could try turn POE off for the specific port if its not required

power inline never

[pwwiddicombe]

Saw the same issue with an old voicemail device that was connected via 10bt to AUI interface adapter.  PoE had to be disabled, and all was well.