Setting Poe Management Mode And Poe Priority Of A Port; Setting The Poe Mode On A Port - H3C S3100 Series Operation Manual

Setting PoE Management Mode and PoE Priority of a Port

When a switch is close to its full load in supplying power, you can adjust the power supply of the switch
through the cooperation of the PoE management mode and the port PoE priority settings. S3100 series
switches support two PoE management modes, auto and manual. The auto mode is adopted by default.
auto: When the switch 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
switch PoE is close to its full load and a new PD is now added to port A, the switch 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 switch will power down the PD connected to
the port with larger port number.
manual: When the switch 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 switch PoE is close to its full load and a new PD is now added to port
A, the switch 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.
Table 1-5 Set the PoE management mode and PoE priority of a port
Operation
Enter system view
Set the PoE management mode for
the switch
Enter Ethernet port view
Se the PoE priority of a port

Setting the PoE Mode on a Port

PoE mode of a port falls into two types, signal mode and spare mode.
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, S3100 series Ethernet switches do 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.
Table 1-6 Set the PoE mode on a port
Operation
Enter system view
Enter Ethernet port view
Command
system-view
poe power-management { auto |
manual }
interface interface-type
interface-number
poe priority { critical | high | low }
Command
system-view
interface interface-type
interface-number
1-4
Description
—
Required
auto by default.
—
Required
low by default.
Description
—
—