Is LLDP enabled on the switch, and is the config resitrcting the power per port in any way, shape, or form? On the switch (if it's Aruba switch), you can run
2920-CompSwitch# show power-over-ethernet 11
Status and Configuration Information for port 11
Power Enable : Yes PoE Port Status : Delivering
PLC Class/Type : 4/2 Priority Config : low
DLC Class/Type : 4/2 Pre-std Detect : off
Alloc By Config : value Configured Type :
Alloc By Actual : value PoE Value Config : 30
PoE Counter Information
Over Current Cnt : 0 MPS Absent Cnt : 0
Power Denied Cnt : 0 Short Cnt : 0
LLDP Information
PSE Allocated Power Value : 30.0 W PSE TLV Configured : dot3, MED
PD Requested Power Value : 25.5 W PSE TLV Sent Type : dot3
MED LLDP Detect : Enabled PD TLV Sent Type : dot3
Power Information
PSE Voltage : 56.3 V PSE Reserved Power : 30.0 W
PD Amperage Draw : 151 mA PD Power Draw : 8.6 W
Refer to command's help option for field definitions
2920-CompSwitch#