Configuring The Maximum Poe Interface Power; Configuring Poe Interface Power Management - HPE 5820X Series Configuration Manuals

Configuring the maximum PoE interface power

The maximum PoE interface power is the maximum power that the PoE interface can provide to the
connected PD. If the PD requires more power than the maximum PoE interface power, the PoE
interface does not supply power to the PD.
To configure the maximum PSE power:
Step
1. Enter system view.
2. Enter PoE interface view.
3. Configure the maximum
power for the PoE interface.

Configuring PoE interface power management

The power supply priority of a PD depends on the priority of the PoE interface. The priority levels of
PoE interfaces are critical, high and low in descending order. Power supply to a PD is subject to PoE
interface power management policies.
All PSEs implement the same PoE interface power management policies. When a PSE supplies
power to a PD, the following actions occur:
•
If the PoE interface power management is not enabled, no power will be supplied to a new PD
when the PSE power is overloaded.
•
If the PoE interface power management priority policy is enabled, the PD with a lower priority is
first powered off to guarantee the power supply to the PD with a higher priority when the PSE
power is overloaded.
19 watts guard band is reserved for each PoE interface on the device to prevent a PD from being
powered off because of a sudden increase of the PD power. When the remaining power of the PSE
where the PoE interface resides is lower than 19 watts and no priority is configured for the PoE
interface, the PSE does not supply power to the new PD; when the remaining power of the PSE
where the PoE interface resides is lower than 19 watts, but priority is configured for the PoE interface,
the interface with a higher priority can preempt the power of the interface with a lower priority to
ensure the normal working of the higher priority interface.
If the sudden increase of the PD power results in PSE power overload, power supply to the PD on
the PoE interface with a lower priority will be stopped to ensure the power supply to the PD with a
higher priority.
If the guaranteed remaining PSE power (the maximum PSE power minus the 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, 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.
Configuration prerequisites
Enable PoE for PoE interfaces.
Configuration procedure
To configure PoE interface power management:
Command
system-view
interface interface-type
interface-number
poe max-power max-power
194
Remarks
N/A
N/A
Optional.
The default is 30000 milliwatts.