Administrator Guide

Configuring PoE or PoE+
Configuring PoE or PoE+ is a two-step process:
1. Connect the IEEE 802.3af/802.3at-compliant powered device directly to a port.
2. Enable PoE or PoE+ on the port extender.
Enabling PoE or PoE+ on a Port
By default, PoE or PoE+ are disabled.
Configuration tasks for PoE include:
● Enabling PoE and managing the inline power supplied to the port extender ports using the power inline mode command.
To manage inline power in a port extender, use Configure Class or Static mode. See Configure Power Management Mode
(Class and Static Mode).
● Limiting the maximum amount of power (in milliwatts) available to a powered device using the power inline
{[max_milliwatts] | priority {critical | high | low}} command. See Allocating PoE Power on a PE and
Determining the Power Priority for a Port.
Configuration Tasks for PoE or PoE+
This chapter describes how to configure and manage the PoE or PoE+ feature on C1048P, N2024P, N2048P, N3024P, and
N3048P PE ports.
Configuration tasks for PoE include:
● Configuring Power Management Mode - Class and Static Mode
● Managing Ports using Power Priority and the Power Budget
● Allocating PoE Power to Power Devices to a Connected PE Interface
● Setting the Global Threshold limit PoE Power Budget
● Detecting and Allocating Power for Legacy Powered Devices
● Advertising Extended Power Though dot3–TLVs
● Advertising the Extended Power through MDI
● Deploying VOIP
● Managing PoE on a PE
○ Upgrading the PoE Controller
○ Stopping and Restarting Power Delivery
○ Monitoring the Power Budget
○ Display Power Consumption on the Port Extender
○ Displaying PoE Power Allocation to Power Devices
For a complete listing of all PoE commands, see the Dell Networking OS Command Line Reference Guide.
Manage Ports using Power Priority and the Power
Budget
The allocation and return of power-on ports depends on the total inline power available in the system and the power priority
calculation.
Determining the Power Priority for a Port
The Dell Networking OS uses a sophisticated port prioritization algorithm to determine which ports receive power so that the
PoE and PoE+ ports are powered up and down deterministically.
The Dell Networking OS maintains a sorted list of PoE and PoE+ ports based on these four parameters. To define the power
priority for a port, the Dell Networking OS uses the following four parameters, in order:
Power over Ethernet (PoE)
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