Viewing the PoE status on specific ports

Syntax:


show power-over-ethernet <port-list>

Displays the following PoE status and statistics (since the last reboot) for each port in <port-list> :

Power Enable

Shows Yes for ports enabled to support PoE (the default) and No for ports on which PoE is disabled. For ports on which power is disabled, this is the only field displayed by show power-over-ethernet <port-list> .

Priority

Lists the power priority (Low, High, and Critical) configured on ports enabled for PoE. (For more on this topic, see Configuring PoE operation.)

Allocate by

How PoE is allocated (usage, class, value).

Detection Status
  • Searching: The port is trying to detect a PD connection.
  • Delivering: The port is delivering power to a PD.
  • Disabled: On the indicated port, either PoE support is disabled or PoE power is enabled but the PoE module does not have enough power available to supply the port's power needs.
  • Fault: The switch detects a problem with the connected PD.
  • Other Fault: The switch has detected an internal fault that prevents it from supplying power on that port.
Over Current Cnt

Shows the number of times a connected PD has attempted to draw more than 15.4 watts for PoE or 24.5 watts for PoE+. Each occurrence generates an Event Log message.

Power Denied Cnt

Shows the number of times PDs requesting power on the port have been denied because of insufficient power available. Each occurrence generates an Event Log message.

Voltage

The total voltage, in volts, being delivered to PDs.

Power

The total power, in watts, being delivered to PDs.

LLDP Detect

Port is enabled or disabled for allocating PoE power, based on the link-partner's capabilities via LLDP.

Configured Type

If configured, shows the user-specified identifier for the port. If not configured, the field is empty.

Value

The maximum amount of PoE power allocated for that port (expressed in watts). Default: 17 watts for PoE; 33 watts for PoE+

Power Class
Shows the power class of the PD detected on the indicated port. Classes include:
  • 0: 0.44 to 12.95 watts

  • 1: 0.44 to 3.84 watts

  • 2: 3.84 to 6.49 watts

  • 3: 6.49 to 12.95 watts

  • 4: For PoE+; up to 25.5 watts can be drawn by the PD

MPS Absent Cnt

Shows the number of times a detected PD has no longer requested power from the port. Each occurrence generates an Event Log message. ("MPS" refers to the "maintenance power signature.")

Short Cnt

Shows the number of times the switch provided insufficient current to a connected PD.

Current

The total current, in mA, being delivered to PDs.

If you want to view the PoE status of ports A6 and A7, you would use show power-over-ethernet A6-A7 to display the data:

show power-over-ethernet <port-list> output

switch(config)# show power-over-ethernet slot A6-A7

 Status and Counters - Port Power Status for port A6

  Power Enable      : Yes
                                        LLDP Detect     : enabled
  Priority          : low               Configured Type : 
  AllocateBy        : value             Value           : 17 W
  Detection Status  : Delivering        Power Class     : 2

  Over Current Cnt  :0                  MPS Absent Cnt  : 0
  Power Denied Cnt  :0                  Short Cnt       : 0

  Voltage           : 55.1 V            Current         : 154 mA
  Power             : 8.4 W

 Status and Counters - Port Power Status for port A7

  Power Enable      : Yes
                                        LLDP Detect     : disabled
  Priority          : low               Configured Type : 
  AllocateBy        : value             Value           : 17 W
  Detection Status  : Searching         Power Class     : 0

  Over Current Cnt  :0                  MPS Absent Cnt  : 0
  Power Denied Cnt  :0                  Short Cnt       : 0

  Voltage           : 0 V               Current         : 0 mA
  Power             : 0 W