3Com WX3000 Setting PoE Management Mode and PoE Priority of a Port, Poe power-management, Low

Setting PoE Management Mode and PoE Priority of a Port

When the device is close to its full load in supplying power, you can adjust the power supply of the device through the cooperation of the PoE management mode and the port PoE priority settings. The device supports two PoE management modes, auto and manual. The auto mode is adopted by default.

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auto: When the device is close to its full load in supplying power, it will first supply power to the PDs that are connected to the ports with critical priority, and then supply power to the PDs that are connected to the ports with high priority. For example: Port A has the priority of critical. When the device PoE is close to its full load and a new PD is now added to port A, the device will power down the PD connected to the port with the lowest priority and turn to supply power to this new PD. If more than one port has the same lowest priority, the device will power down the PD connected to the port with larger port number.

manual: When the device is close to its full load in supplying power, it will not make change to its

original power supply status based on its priority when a new PD is added. For example: Port A has the priority critical. When the device PoE is close to its full load and a new PD is now added to port A, the device just gives a prompt that a new PD is added and will not supply power to this new PD.

After the PoE feature is enabled on the port, perform the following configuration to set the PoE management mode and PoE priority of a port.

Follow these steps to set the PoE management mode and PoE priority of a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Set the PoE management	poe power-management	Required
mode for the device	{ auto manual }	auto by default.
Enter Ethernet port view	interface interface-type	—
	interface-number
Se the PoE priority of a port	poe priority { critical high	Required
	low }	low by default.

Setting the PoE Mode on a Port

PoE mode of a port falls into two types, signal mode and spare mode.

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Signal mode: DC power is carried over the data pairs (1,2,3,6) of category-3/5 twisted pairs.

Spare mode: DC power is carried over the spare pairs (4,5,7,8) of category-3/5 twisted pairs.

Currently, the device does not support the spare mode.

After the PoE feature is enabled on the port, perform the following configuration to set the PoE mode on a port.

Follow these steps to set the PoE mode on a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type	—
	interface-number

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