Catalyst 9300-LM PoE Issue with AIR-AP1832I-E-K9 Wireless APs

[fabio-correia]

Hello,

I seem to be having a PoE problem with AIR-AP1832I-E-K9 WAPs connecting to C9300-LM switches. This AP model has worked fine for a good few years connected to a C3560 switch. The switch has been replaced with a 9300-LM and power is granted for a short period and then removed, repeatedly.

Syslog messages:

Jul 6 14:18:16 BST: %ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/17: Power Controller reports power Imax error detected
Jul 6 14:18:26 BST: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/17: PD removed

Running the command 'debug ilpower controller' shows an inconsistency with the port connected to that specific AP. 

Port Gi1/0/16 and Gi1/0/17 are both connected to AIR-AP1832I-E-K9 APs and the numbers for Gi1/0/16 are pretty much the same as other ports where we have APs connected. Gi1/0/17 is connected to the problematic AP and the PoE numbers are anomalous.

Jul 9 15:30:25 BST: ILP:: ILP:Gi1/0/16:power real 4465, min 3516, max 8372, police 0, overdraw: 0

Jul 9 15:30:25 BST: ILP:: ILP:Gi1/0/17:power real 12669, min 11162, max 14344, police 0, overdraw: 0

Thanks

Fábio

[marce1000]

   - Enable LLDP on the ports where these APs are connected too
   - Check software version and upgrade to https://software.cisco.com/download/home/286322102/type/282046477/release/Dublin-17.12.3
     if applicable , and or especially if it is  on a somewhat older software version , 

 M.

[Haydn Andrews]

What was said above but also try running a cable diagnostic as there may also be a cable fault