Power Over Ethernet (PoE/PoE+) Operation

Configuring PoE Operation

ProCurve(config)# int A7 poe-value 4

ProCurve(config)# show power-over-ethernet A7

Status and Counters - Port Power Status for port A7

Power Enable

: Yes

 

 

 

 

LLDP Detect

: enabled

Priority

: low

 

 

 

 

 

 

 

 

Configured Type

:

AllocateBy

 

 

 

 

 

: value

 

 

 

 

Value

: 4 W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Class

: 2

Detection Status

 

: fault

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Over Current Cnt

: 1

 

 

 

 

 

 

 

 

 

MPS Absent Cnt

: 0

Power Denied Cnt

: 2

 

 

 

 

 

 

 

 

 

Short Cnt

: 0

Voltage

: 55.1 V

 

 

 

 

Current

: 154 mA

Power

: 8.4 W

 

 

 

 

 

 

Figure 11-2. Example Showing PoE Power Value Set Too Low for the PDConfiguring PoE Redundancy (Chassis Switches Only)

When PoE redundancy is enabled, PoE redundancy occurs automatically. The switch keeps track of power use and won’t supply PoE power to additional PoE devices trying to connect if that results in the switch not having enough power in reserve for redundancy if one of the power supplies should fail.

Syntax: [no] power-over-ethernet redundancy [n+1 full]Allows you to set the amount of power held in reserve for redundancy.The no option means that all available power can be allocated to PDs.Default: No PoE redundancy enforced.

n+1: One of the power supplies is held in reserve for redundancy. If a single power supply fails, no powered devices are shut down. If power supplies with different ratings are used, the highest- rated power supply is held in reserve to ensure full redundancy.

full: Half of the available power supply is held in reserve for redundancy. If power supplies with different ratings are used, the highest-rated power supply is held in reserve to ensure full redundancy.

See the PoE Planning and Implementation Guide for more information about PoE redundancy and power supplies, available on the ProCurve website at www. procurve.com

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