H3C Technologies H3C S3100 Series Switches - Manual (Page 667)

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more than one port has the same lowest priority, the switch will power down the PD connected to
the port with larger port number.
z 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 Command Description
Enter system view system-view —
Set the PoE management mode for
the switch poe power-management { auto |
manual }
Required
auto by default.
Enter Ethernet port view
interface interface-type
interface-number
—
Se the PoE priority of a port poe priority { critical | high | 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, 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 Command Description
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Set the PoE mode on the port to
signal
poe mode signal
Optional
signal by default.
Configuring the PD Compatibility Detection Function
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.
After the PoE feature is enabled, perform the following configuration to enable the PD compatibility
detection function.