PoE Configuration Guide

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Configure perpetual PoE and fast PoE

Updated: September 15, 2025

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Overview

Use this procedure to configure perpetual PoE and fast PoE.

Perform this task to configure Perpetual PoE and Fast PoE.

Before you begin

Configure the perpetual-poe-ha command before connecting the powered device, or manually shut or unshut the port after configuring poe-ha command.

Procedure

1.

enable

Example:

Device> enable

Enables privileged EXEC mode.

Enter your password, if prompted.
2.

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.
3.

interface interface-id

Example:

Device(config)# interface gigabitethernet1/0/4

Specifies the physical port to be configured, and enters interface configuration mode.
4.

power inline port perpetual-poe-ha

Example:

Device(config-if)# power inline port perpetual-poe-ha

Configures perpetual PoE. When you configure perpetual PoE on a port connected to a powered device, the powered device remains powered on during reload.
5.

power inline port poe-ha

Example:

Device(config-if)# power inline port poe-ha

Configures Fast PoE. When you configure Fast PoE, if the switch is power cycled, PD device is powered on within 10-15 seconds of plugging into a power source without waiting for IOS to boot up.
6.

end

Example:

Device(config-if)# end

Returns to privileged EXEC mode.