poe power-reserved (AP system profile view)

Function

The poe power-reserved command configures the percentage of the reserved PoE power against the total PoE power on an AP.

The undo poe power-reserved command restores the default percentage of the reserved PoE power against the total PoE power on an AP.

By default, the percentage of the reserved PoE power against the total PoE power on an AP is 0%.

Format

poe power-reserved power-reserved

undo poe power-reserved

Parameters

Parameter	Description	Value
power-reserved	Specifies the percentage of the reserved PoE power against the total PoE power.	The value is an integer that ranges from 0 to 100, in percentage.

Views

AP system profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The AP can dynamically allocate power to each interface according to the power consumption of each interface. The power consumption of a PD keeps changing when the PD is running. The system periodically calculates the total power consumption of all the PDs. If the total power consumption exceeds the upper threshold of the AP, the system cuts off the power of the PDs on the interfaces of low priority to ensure that other PDs can run normally.

Sometimes, however, the power consumption increases sharply and the available power of the system cannot support the burst increase of power. At this time, the system has not calculated and found that the total power consumption exceeded the upper threshold; therefore, the system does not cut off power low-priority interfaces in time. As a result, the PoE power supply is shut down for overload protection, and all PDs are powered off.

This problem can be solved by running the poe power-reserved command to set proper reserved power. When there is a burst increase in power consumption, the reserved power can support the system running. Then the system has time to power off interfaces of low priority to ensure stable running of other PDs.

Precautions

You can set the maximum output power of an AP using the poe max-power (AP system profile view) command. The available PoE power is the configured maximum output power. If no maximum output power is configured, the available PoE power is the total power provided by the PoE power supply.

This function is supported only by the AP4050DN-E, AP4050DN-HD, AP7050DN-E, AP8082DN, AP8182DN, AP2050DN-E, AP2051DN-E, R250D-E, R251D-E, AD9431DN-24X, AD9430DN-24, AD9430DN-12.

Example

# Set the percentage of reserved PoE power to the total PoE power to 10%.

<HUAWEI> system-view
[HUAWEI] wlan 
[HUAWEI-wlan-view] ap-system-profile name apsys1
[HUAWEI-wlan-ap-system-prof-apsys1] poe power-reserved 10