Viewing PoE status on all ports

Syntax: 


show power-over-ethernet brief

Displays the port power status:

PoE Port

Lists all PoE-capable ports on the switch.

Power Enable

Shows Yes for ports enabled to support PoE (the default) and No for ports on which PoE is disabled.

Power Priority

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

Alloc by

Displays how PoE is allocated (usage, class, value).

Alloc Power

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

Actual Power

The power actually being used on that port.

Configured Type

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

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.
Power Class
Shows the 802.3af power class of the PD detected on the indicated port. Classes include:

  • 0: 0.44 to 12.95 watts can be drawn by the PD. Default class.

  • 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

The show power-over-ethernet brief displays this output:

show power-over-ethernet brief command output 

switch(config)# show power-over-ethernet brief

 Status and Counters - System Power Status

  System Power Status  : No redundancy
  PoE Power Status     : No redundancy

  Available: 600 W Used: 9 W Remaining: 591 W

  Module A Power
  Available: 408 W Used: 9 W Remaining: 399 W

  POE   | Power   Power     Alloc Alloc  Actual Configured  Detection  Power
  Port  | Enable  Priority  By    Power  Power  Type        Status     Class
  ----- + ------- --------- ----- ------ ------ ----------- ---------- ----
  A1    | Yes     low       usage 17 W   0.0 W              Searching  0
  A2    | Yes     low       usage 17 W   0.0 W              Searching  0
  A3    | Yes     low       usage 17 W   0.0 W              Searching  0
  A4    | Yes     low       usage 17 W   0.0 W              Searching  0
  A5    | Yes     low       usage 17 W   0.0 W              Searching  0
  A6    | Yes     low       usage 17 W   8.4 W              Delivering 2
  A7    | Yes     low       usage 17 W   0.0 W              Searching  0
  A8    | Yes     low       usage 17 W   0.0 W              Searching  0
  A9    | Yes     low       usage 17 W   0.0 W              Searching  0

You can also show the PoE information by slot:

Showing the PoE information by slot

switch(config)# show power-over-ethernet slot A

 Status and Counters - System Power Status for slot A

  Maximum Power      : 408 W           Operational Status  : On
  Power In Use       :   9 W +/- 6 W   Usage Threshold (%) : 80