3Com Switch 4500 26-Port User Manual

PoE Configuration 75
Setting the Maximum
Power Output on a Port
The maximum power that can be supplied by an Ethernet port of the Switch 4500
26-Port PWR and Switch 4500 50-Port PWR to its PD is 15400 mW. In practice,
you can set the maximum power on a port depending on the actual power of the
PD, with a range from 1000 to 15400 mW and in the increment of 100 mW.
Perform the following configuration in Ethernet Port View to set the maximum
power supplied by a port..
Tab le 68 Setting the Maximum power on a port
By default, the maximum power on a port is 15400 mW.
Setting Power Supply
Management Mode in
Overload and Port
Priority
The power supply management mode and the port priority settings will work
together to control the power feeding of the switch when the switch is reaching
its full power load in supplying power.
When AC power input is adopted for the switch, The maximum main total power
that can be supplied by the PWR switches is 300 W. By default, when the Switch
reaches its full load in supplying power, it will manage the power supply to its
ports in
auto mode.
z auto mode — when the switch is reaching 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 is reaching 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 low 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 logical port number.
z manual mode — when the switch is reaching its full load in supplying power, it
will neither take the priority into account nor make change to its original power
supply status. For example:
Port A has the priority critical. When the Switch is reaching 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.
Setting the Power Supply Management Mode on the Switch
Perform the following configuration in System View.
Operation Command
Set the maximum power supplied by a port poe max-power max-power
Restore the default maximum power on the port undo poe max-power

3Com Switch 4500 26-Port Specifications

General

Brand	3Com
Model	Switch 4500 26-Port
Category	Switch
Language	English