Example for Configuring PoE

Networking Requirements

In Figure 1, the switch is deployed at the access layer on the network. The IP phones connected to the switch are deployed outdoors and APs are deployed on the external wall of the office. It is difficult to connect power supplies to these devices. The user wants the switch to provide power for these devices and save deployment costs.

AP1 provides wireless access to the office network of the bank, and so it cannot be powered off and requires the highest power supply priority. IP Phone1 processes heavy service traffic, and so it requires a high power supply priority and cannot be powered off.

Figure 1 Networking diagram of the PoE application

Configuration Roadmap

The switch must support PoE and have PoE power supplies installed.

The configuration roadmap is as follows:

Configure the power supply priority on GigabitEthernet0/0/2 and GigabitEthernet0/0/1 so that AP1 and IP phone1 are provided with power preferentially.
Configure the maximum output power on GigabitEthernet0/0/1, GigabitEthernet0/0/3, and GigabitEthernet0/0/2 to limit the power of these interfaces and prevent damage to the device.

Procedure

Set the maximum output power on GigabitEthernet0/0/1, GigabitEthernet0/0/3, and GigabitEthernet0/0/2 to 15 W, 15 W, and 20 W respectively. Output power is measured in mW on the device.

<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] poe power 15000
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] poe power 15000
[Switch-GigabitEthernet0/0/3] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] poe power 20000
[Switch-GigabitEthernet0/0/2] quit

Set the power supply priority on GigabitEthernet0/0/2 to critical.

[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] poe priority critical
[Switch-GigabitEthernet0/0/2] quit

Set the power supply priority on GigabitEthernet0/0/1 to high.

[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] poe priority high
[Switch-GigabitEthernet0/0/1] quit

Verify the configuration.

# Check the PoE power supply status of the interface on the device.

[Switch] display poe power-state
PORTNAME            POWERON/OFF  ENABLED  FAST-ON  PRIORITY STATUS
--------------------------------------------------------------------------------
GigabitEthernet0/0/1     on      enable   -        high     Powered
GigabitEthernet0/0/2     on      enable   -        Critical Powered
GigabitEthernet0/0/3     on      enable   -        Low      Powered
GigabitEthernet0/0/4     on      enable   -        Low      Powered
GigabitEthernet0/0/5     off     enable   -        Low      Detecting
GigabitEthernet0/0/6     off     enable   -        Low      Detecting
GigabitEthernet0/0/7     off     enable   -        Low      Detecting  
GigabitEthernet0/0/8     off     enable   -        Low      Detecting 
GigabitEthernet0/0/9     off     enable   -        Low      Detecting
GigabitEthernet0/0/10    off     enable   -        Low      Detecting
GigabitEthernet0/0/11    off     enable   -        Low      Detecting
GigabitEthernet0/0/12    off     enable   -        Low      Detecting
GigabitEthernet0/0/13    off     enable   -        Low      Detecting
GigabitEthernet0/0/14    off     enable   -        Low      Detecting
GigabitEthernet0/0/15    off     enable   -        Low      Detecting
GigabitEthernet0/0/16    off     enable   -        Low      Detecting
GigabitEthernet0/0/17    off     enable   -        Low      Detecting
GigabitEthernet0/0/18    off     enable   -        Low      Detecting
GigabitEthernet0/0/19    off     enable   -        Low      Detecting
GigabitEthernet0/0/20    off     enable   -        Low      Detecting
GigabitEthernet0/0/21    off     enable   -        Low      Detecting
GigabitEthernet0/0/22    off     enable   -        Low      Detecting
GigabitEthernet0/0/23    off     enable   -        Low      Detecting
GigabitEthernet0/0/24    off     enable   -        Low      Detecting

Configuration Files

#
sysname Switch
#
interface GigabitEthernet0/0/1
 poe priority high
 poe power 15000
#
interface GigabitEthernet0/0/2
 poe priority critical
 poe power 20000
#
interface GigabitEthernet0/0/3
 poe power 15000
#
return