Viewing the global PoE power status of the switch

Syntax:

show power-over-ethernet

Displays the switch's global PoE power status, including:

  • Pre-standard Detect

    Shows whether PoE for pre-802.3af-standard powered devices is enabled on the switch. (Default: Off; shows On when PoE for pre-802.3af-standard powered devices has been enabled.)

  • Operational Status

    Indicates whether PoE power is available on the switch. (Default: On; shows Off if PoE power is not available. Shows Faulty if internal or external PoE power is oversubscribed or faulty.)

  • Usage Threshold (%)

    Lists the configured percentage of available PoE power provisioning the switch must exceed to generate a usage notice in the form of an Event Log message and an SNMP trap. If this event is followed by a drop in power provisioning below the threshold, the switch generates another SNMP trap and Event Log message. Event Log messages are also sent to any optionally configured debug destinations. (Default: 80%)

  • Total Available Power

    Lists the maximum PoE wattage available to provision active PoE ports on the switch. This is the amount of usable power for PDs.

  • Total Failover Power

    Lists the amount of PoE power available in the event of a single power supply failure. This is the amount of power the switch can maintain without dropping any PDs.

  • Total Redundancy Power

    Indicates the amount of PoE power held in reserve for redundancy in case of a power supply failure.

  • Total Remaining Power

    The amount of PoE power still available.

    brief

    Displays PoE information for each port. See Viewing PoE status on all ports.

    <port-list>

    Displays PoE information for the ports in port-list. See Viewing the PoE status on specific ports.

The show power-over-ethernet displays data similar to that shown in Output for the show power-over-ethernet command.

Output for the show power-over-ethernet command

HP Switch(config)# show power-over-ethernet

 Status and Counters - System Power Status

  Pre-standard Detect  : On
  System Power Status  : No redundancy
  PoE Power Status     : No redundancy

 Chassis power-over-ethernet

  Total Available Power  :  600 W
  Total Failover Power   :  300 W
  Total Redundancy Power :    0 W
  Total Used Power       :    9 W +/- 6W
  Total Remaining Power  :  591 W

 Internal Power
        1  300W/POE  /Connected.
        2  300W/POE  /Connected.
        3  Not Connected.
        4  Not Connected.
 External Power
        EPS1  /Not Connected.
        EPS2  /Not Connected.

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:

Output for the show power-over-ethernet brief command

HP 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

HP 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

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:

Output for the show power-over-ethernet <port-list> command

HP 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