Configuring Pd Power Management - 3Com MSR 50 Series Configuration Manual

2180 C 123: P E C
HAPTER O
Configuring PD Power
Management
n
ONFIGURATION
To do...
Configure the power
priority for the PSE
Configure a PSE
power management
priority policy
The power priority of a PD depends on the priority of the PoE interface. The
priority levels of PoE interfaces include critical, high and low in descending order.
Power supply to a PD is subject to PD power management policies.
all PSEs implement the same PD power management policies. When the PSE
supplies power to a PD,
By default, no power will be supplied to a new PD if the PSE power is
■
overloaded.
Under the control of a priority policy, the PD with a lower priority is first
■
powered off to guarantee the power supply to the new PD with a higher
priority when the PSE power is overloaded.
If the guaranteed remaining PSE power (maximum PSE power - power allocated to
the critical PoE interface, 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, 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 seizing power.
Configuration prerequisites
Enable PoE for PoE interfaces.
Configuration procedure
Follow these steps to configure PD power management:
To do...
Enter system view
Use the command...
poe priority { critical | high |
low } [ pse pse-id ]
poe pse-policy priority
Use the command...
system-view
Remarks
Optional
By default, the power priority level of
the PSE is low.
The support of the pse pse-id
argument varies with devices.
Optional
By default, no PSE power
management priority policy is
configured.
Remarks
-