Configuring Poe Power Management; Configuring Pse Power Management - H3C S7500E Series Operation Manual

Operation Manual – PoE
H3C S7500E Series Ethernet Switches
Caution:
After a PoE configuration file is applied to a PoE interface, other PoE configuration
files can not take effect on this PoE interface.
If a PoE configuration file is already applied to a PoE interface, you must execute
the undo apply poe-profile command to remove the application to the interface
before deleting or modifying the PoE configuration file.
If you have configured a PoE interface through the command line, you cannot
configure it through a PoE configuration file again. If you want to reconfigure the
interface through a PoE configuration file, you must first remove the command line
configuration on the PoE interface.
You must use the same mode (command line or PoE configuration file) to configure
the poe max-power max-power and poe priority { critical | high | low }
commands.

1.6 Configuring PoE Power Management

PoE power management involves PSE power management and PD power
management.

1.6.1 Configuring PSE Power Management

Where the maximum PoE power may be lower than the sum of the maximum power
required by all PSEs, PSE power management is applied to guarantee power supply to
important PSEs. Where the maximum PoE power of the device is higher than the sum
of the maximum power required by all PSEs, it is unnecessary to enable PSE power
management.
Power supply to a PSE is subject to PSE power management policies.
When the PoE power supplies power to a PSE,
By default, no power will be supplied to a new PSE when the PoE power is
overloaded.
Under the control of a priority policy, the PSE with a lower priority is first
disconnected to guarantee the power supply to the new PSE with a higher priority
when the PoE power is overloaded.
The power priority levels of PSE include critical, high and low in descending order.
If the guaranteed remaining PoE power (guaranteed maximum PoE power – power
allocated to the critical PSE, regardless of whether PoE is enabled for the PSE) is lower
than the maximum power of the PSE, you will fail to set the power priority of the PSE to
critical. Otherwise, you can succeed in setting the power priority to critical, and this
1-6
Chapter 1 PoE Configuration