3Com 4210 PWR Configuration Manual page 344

342 C 31: P E C
HAPTER O
Setting the PoE Mode on
a Port
Configuring the PD
Compatibility Detection
Function
ONFIGURATION
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 263 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
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, the Switch 4210 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.
Table 264 Set the PoE mode on a port
Operation
Enter system view
Enter Ethernet port view
Set the PoE mode on the port
to signal
After the PD compatibility detection function is enabled, the switch can detect the
PDs that do not conform to the 802.3af standard and supply power to them.
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
poe mode signal
Description
-
Required
auto by default.
-
Required
low by default.
Description
-
-
Optional
signal by default.