According to the standard of the IEEE 802.3 af, PoE switches
can use twisted-pair idle line to supply power , can also use
the twisted pair Signal line to supply power , PD equipment
shall supply power at the same time support the free line of
power supply and signal lines in two ways.
IEEE 802.3 at switches provide backward compatibility ability,
support at 802.3 PoE switches can use only support on the
IEEE 802.3 af of PD equipment.
8.2. POE Configuration
8.2.1.
Set port POE function
The user can enable or close port PoE function. By default, the access layer switch port of PoE
function is enable, the core switches PoE function is closed.Please configure the following at the
interface mode.
If you use interface range command batch configuration port PoE
function,Due to the range command is configuration interfaces
one by one, a port PoE function were switched on or off, will affect
the equipment global supply management. So maybe can appear
in the process of configuration interface to electricity up and down
phenomenon, which belongs to the normal phenomenon.
Command
Function
Switch# configure terminal
Enter global configuration mode
Switch(config)# interface gigabitEthernet
port-id
Enter interface configuration mode,
specified to configure the physical port
Switch(config-if-GigabitEthernet-0/1)#
poe
enable
Enable remote power supply of the port
Switch(config-if-GigabitEthernet-0/1)#
no
poe enable
Close port of the remote power supply
Switch(config)#
end
Back in privileged mode
Switch# write
Save Settings to parameter file