H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – PoE
H3C S7500E Series Ethernet Switches Chapter 1 PoE Configuration
1-8
 Note:
If the sudden increase of the power of the PD results in PSE power overload, power
supply to the PD on the PoE interface with a lower priority will be stopped.
If the guaranteed remaining PSE power (power allocated to the critical PoE interface
subtracted from maximum PSE power, regardless of whether PoE is enabled for the
PoE interface) is lower than the maximum power of the PoE interface, you will fail to set
the priority of the PoE interface to critical. Otherwise, you can succeed in setting the
priority to critical, and this PoE interface will preempt the power of other PoE interfaces
with a lower priority level. In the latter case, the PoE interfaces whose power is
preempted will be powered off, but their configurations will remain unchanged. When
you change the priority of a PoE interface from critical to a lower level, the PDs
connecting to other PoE interfaces will have an opportunity of being powered.
I. Configuration prerequisites
Enable PoE for PoE interfaces.
II. Configuration procedure
Follow these steps to configure PD power management:
To do… Use the command… Remarks
Enter system view
system-view
—
interface interface-type
interface-number
Configure the power
priority for the PoE
interface in PoE
interface view
poe priority { critical |
high | low }
poe-profile profile-name
[ index ]
Configur
e the
power
priority
for a
PoE
interface
Configure the power
priority for the PoE
interface in PoE
configuration file view
poe priority { critical |
high | low }
Use either
command.
By default, the
power priority of
a PoE interface
is low.
Configure a PD power
management priority policy
poe pd-policy priority
Optional
By default, no
PD power
management
priority policy is
configured.
1.7 Configuring the PoE Monitoring Function
The PoE monitoring function involves monitoring of PoE power, PSE and PD.