Example: Configuring PoE on All Interfaces

This example shows how to configure PoE on all interfaces of the device.

• Requirements
• Overview
• Configuration
• Verification

Requirements

Before you begin, configure Ethernet interfaces.

Overview

This example shows how to configure PoE on all interfaces of the device. Within the example, the power port priority is set to low, the maximum power available to a port is set to 15.4 watts, PoE power consumption logging is enabled with the default telemetries settings, the PoE management mode is set to static, and the reserved power in case of a spike in PoE consumption is set to 15 watts.

Configuration

Step-by-Step Procedure

To configure PoE:

1. Enable PoE.

   [edit]user@host# edit poe interface all

2. Set the power port priority.

   [edit poe interface all]user@host# set priority low

3. Set the maximum PoE wattage available for a port.

   [edit poe interface all]user@host# set maximum-power 15.4

4. Enable logging of PoE power consumption.

   [edit poe interface all]user@host# set telemetries

5. Set the PoE management mode.

   [edit]user@host# set poe management static

6. Reserve power wattage in case of a spike in PoE consumption.

   [edit]user@host# set poe guard-band 15

Verification

To confirm that the configuration is working properly, perform these tasks:

• Verifying the Status of PoE Interfaces
• Verifying PoE Global Parameters

Verifying the Status of PoE Interfaces

Purpose

Verify that the PoE interfaces on the device are enabled and set to the desired priority settings. (The device used here is SRX240 Services Gateway).

Action

From operational mode, enter the show poe interface command.

Interface Admin status Oper status Max power Priority Power consumption Class
 ge-0/0/0 Enabled      Searching   15.4W     Low      0.0W                0
 ge-0/0/1 Enabled      Powered-up  15.4W     High     6.6W                0
 ge-0/0/2 Disabled     Disabled    15.4W     Low      0.0W                0
 ge-0/0/3 Disabled     Disabled    15.4W     Low      0.0W                0

Meaning

The show poe interface command lists PoE interfaces configured on the SRX Series device, with their status, priority, power consumption, and class. This output shows that the device has four PoE interfaces of which two are enabled with default values. One port has a device connected that is drawing power within expected limits.

Verifying PoE Global Parameters

Purpose

Verify global parameters such as guard band, power limit, and power consumption.

Action

From operational mode, enter the show poe controller command.

Controller  Maximum   Power          Guard band  Management
index       power     consumption
   0        150.0 W    0.0 W         0 W         Static

Meaning

The show poe controller command lists the global parameters configured on the SRX Series device such as controller index, maximum power, power consumption, guard band, and management mode along with their status

Related Topics

• Junos OS Feature Support Reference for SRX Series and J Series Devices
• Understanding Power over Ethernet
• Example: Configuring PoE on an Individual Interface
• Example: Deleting a PoE Interface