3com WX3000 Manuel D’Utilisation
1-4
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.
z
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.
z
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
mode for the device
mode for the device
poe power-management
{ auto | manual }
{ auto | manual }
Required
auto by default.
Enter Ethernet port view
interface interface-type
interface-number
interface-number
—
Se the PoE priority of a port
poe priority { critical | high |
low }
low }
Required
low by default.
Setting the PoE Mode on a Port
PoE mode of a port falls into two types, signal mode and spare mode.
z
Signal mode: DC power is carried over the data pairs (1,2,3,6) of category-3/5 twisted pairs.
z
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
interface-number
—