Table of Contents

1 PoE Configuration· 1-1

PoE Overview· 1-1

Introduction to PoE· 1-1

PoE Features Supported by the Device· 1-2

PoE Configuration· 1-2

PoE Configuration Task List 1-2

Enabling the PoE Feature on a Port 1-3

Setting the Maximum Output Power on a Port 1-3

Setting PoE Management Mode and PoE Priority of a Port 1-4

Setting the PoE Mode on a Port 1-4

Configuring the PD Compatibility Detection Function· 1-5

Upgrading the PSE Processing Software Online· 1-5

Displaying and Maintaining PoE Configuration· 1-6

PoE Configuration Example· 1-6

PoE Configuration Example· 1-6

2 PoE Profile Configuration· 2-1

Introduction to PoE Profile· 2-1

PoE Profile Configuration· 2-1

Configuring PoE Profile· 2-1

Displaying and Maintaining PoE Profile Configuration· 2-2

PoE Profile Configuration Example· 2-3

PoE Profile Application Example· 2-3

 

When configuring PoE, go to these sections for information you are interested in:

l          PoE Overview

l          PoE Configuration

l          PoE Configuration Example

 

 

PoE Overview

Introduction to PoE

Power over Ethernet (PoE)-enabled devices use twisted pairs through electrical ports to supply power to the remote powered devices (PD) in the network and implement power supply and data transmission simultaneously.

Advantages of PoE

l          Reliability: The centralized power supply provides backup convenience, unified management, and safety.

l          Easy connection: Network terminals only require an Ethernet cable, but no external power supply.

l          Standard: PoE conforms to the 802.3af standard and uses a globally uniform power interfaces;

l          Bright application prospect: PoE can be applied to IP phones, wireless access points (APs), chargers for portable devices, card readers, network cameras, and data collection system.

PoE components

PoE consists of three components: power sourcing equipment (PSE), PD, and power interface (PI).

l          PSE: PSE is comprised of the power and the PSE functional module. It can implement PD detection, PD power information collection, PoE, power supply monitoring, and power-off for devices.

l          PD: PDs receive power from the PSE. PDs include standard PDs and nonstandard PDs. Standard PDs conform to the 802.3af standard, including IP phones, Wireless APs, network cameras and so on.

l          PI: PIs are RJ45 interfaces which connect PSE/PDs to network cables.

PoE Features Supported by the Device

Table 1-1 Power supply parameters of PoE device

Device	Input power supply	Number of electrical ports supplying power	Maximum PoE distance	Maximum power provided by each electrical port	Total Maximum PoE output power
WX3024	DC input	24	100 m (328.08 ft.)	25 W	600 W
	AC input				370 W
WX3010	DC input	8	100 m (328.08 ft.)	25 W	125 W
WX3008	DC input	4	100 m (328.08 ft.)	25 W	125 W

 

A PoE-enabled device has the following features:

l          As the PSE, it supports the IEEE802.3af standard. It can also supply power to some PDs that do not support the 802.3af standard.

l          It can deliver data and current simultaneously through data wires (1,2,3,6) of category-3/5 twisted pairs.

l          The PSE processing software on the device can be upgraded online.

l          The device provides statistics about power supplying on each port and the whole equipment, which you can query through the display command.

l          The device provides two modes (auto and manual) to manage the power feeding to ports in the case of PSE power overload.

l          The device provides over-temperature protection mechanism. When the internal temperature of the device exceeds the PoE protection temperature, the device disables the PoE feature on all ports for self-protection.

l          The device supports the PoE profile feature, that is, different PoE policies can be set for different user groups. These PoE policies are each saved in the corresponding PoE profile and applied to ports of the user groups.

 

 

PoE Configuration

PoE Configuration Task List

Complete the following tasks to configure PoE:

Task	Remarks
Enabling the PoE Feature on a Port	Required
Setting the Maximum Output Power on a Port	Optional
Setting PoE Management Mode and PoE Priority of a Port	Optional
Setting the PoE Mode on a Port	Optional
Configuring the PD Compatibility Detection Function	Optional
Upgrading the PSE Processing Software Online	Optional
Displaying and Maintaining PoE Configuration	Optional

 

Enabling the PoE Feature on a Port

Follow these steps to enable the PoE feature on a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type interface-number	—
Enable the PoE feature on a port	poe enable	Required

 

 

Setting the Maximum Output Power on a Port

The maximum power that can be supplied by each Ethernet electrical port of a PoE-enabled device to its PD is 25,000 mW. In practice, you can set the maximum power on a port depending on the actual power of the PD, in the range of 1,000 to 25,000 mW and in the granularity of 1 mW.

Follow these steps to set the maximum output power on a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type interface-number	—
Set the maximum output power on the port	poe max-power max-power	Required 25,000 mW by default.

 

Setting PoE Management Mode and PoE Priority of a Port

When the device is close to its full load in supplying power, you can adjust the power supply of the device through the cooperation of the PoE management mode and the port PoE priority settings. The device supports two PoE management modes, auto and manual. The auto mode is adopted by default.

l          auto: When the device is close to its full load in supplying power, it will first supply power to the PDs that are connected to the ports with critical priority, and then supply power to the PDs that are connected to the ports with high priority. For example: Port A has the priority of critical. When the device PoE is close to its full load and a new PD is now added to port A, the device will power down the PD connected to the port with the lowest priority and turn to supply power to this new PD. If more than one port has the same lowest priority, the device will power down the PD connected to the port with larger port number.

l          manual: When the device is close to its full load in supplying power, it will not make change to its original power supply status based on its priority when a new PD is added. For example: Port A has the priority critical. When the device PoE is close to its full load and a new PD is now added to port A, the device just gives a prompt that a new PD is added and will not supply power to this new PD.

After the PoE feature is enabled on the port, perform the following configuration to set the PoE management mode and PoE priority of a port.

Follow these steps to set the PoE management mode and PoE priority of a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Set the PoE management mode for the device	poe power-management { auto | manual }	Required auto by default.
Enter Ethernet port view	interface interface-type interface-number	—
Se the PoE priority of a port	poe priority { critical | high | low }	Required low by default.

 

Setting the PoE Mode on a Port

PoE mode of a port falls into two types, signal mode and spare mode.

l          Signal mode: DC power is carried over the data pairs (1,2,3,6) of category-3/5 twisted pairs.

l          Spare mode: DC power is carried over the spare pairs (4,5,7,8) of category-3/5 twisted pairs.

Currently, the device does not support the spare mode.

After the PoE feature is enabled on the port, perform the following configuration to set the PoE mode on a port.

Follow these steps to set the PoE mode on a port:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type interface-number	—
Set the PoE mode on the port to signal	poe mode signal	Optional signal by default.

 

Configuring the PD Compatibility Detection Function

After the PD compatibility detection function is enabled, the device can detect the PDs that do not conform to the 802.3af standard and supply power to them.

After the PoE feature is enabled, perform the following configuration to enable the PD compatibility detection function.

Follow these steps to configure the PD compatibility detection function:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enable the PD compatibility detection function	poe legacy enable	Required Disabled by default.

 

Upgrading the PSE Processing Software Online

The online upgrading of PSE processing software can update the processing software or repair the software if it is damaged. Before performing the following configuration, download the PSE processing software to the flash of the device .

Follow these steps to upgrade PSE processing software online:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Upgrade the PSE processing software online	poe update { refresh | full } filename	Required The specified PSE processing software is a file with the extension .s19.

 

Displaying and Maintaining PoE Configuration

To do…	Use the command…	Remarks
Display the PoE status of a specific port or all ports of the device	display poe interface [ interface-type interface-number ]	Available in any view
Display the PoE power information of a specific port or all ports of the device	display poe interface power [ interface-type interface-number ]
Display the PSE parameters	display poe powersupply

 

PoE Configuration Example

PoE Configuration Example

Networking requirements

As shown in Figure 1-1, Switch A supports PoE, Switch B can be PoE powered.

l          The GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 ports of Switch A are connected to Switch B and an AP respectively; the GigabitEthernet 1/0/8 port is intended to be connected with an important AP.

l          The PSE processing software of Switch A is first upgraded online. The remotely accessed PDs are powered by Switch A.

l          The power consumption of the accessed AP is 2,500 mW, and the maximum power consumption of Switch B is 12,000 mW.

l          It is required to guarantee the power feeding to the PDs connected to the GigabitEthernet 1/0/8 port even when Switch A is under full load.

Figure 1-1 Network diagram for PoE

 

Configuration procedure

# Upgrade the PSE processing software online.

<SwitchA> system-view

[SwitchA] poe update refresh 0290_021.s19

# Enable the PoE feature on GigabitEthernet 1/0/1, and set the PoE maximum output power of GigabitEthernet 1/0/1 to 12,000 mW.

[SwitchA] interface GigabitEthernet 1/0/1

[SwitchA-GigabitEthernet1/0/1] poe enable

[SwitchA-GigabitEthernet1/0/1] poe max-power 12000

[SwitchA-GigabitEthernet1/0/1] quit

# Enable the PoE feature on GigabitEthernet 1/0/2, and set the PoE maximum output power of GigabitEthernet 1/0/2 to 2500 mW.

[SwitchA] interface GigabitEthernet 1/0/2

[SwitchA-GigabitEthernet1/0/2] poe enable

[SwitchA-GigabitEthernet1/0/2] poe max-power 2500

[SwitchA-GigabitEthernet1/0/2] quit

# Enable the PoE feature on GigabitEthernet 1/0/8, and set the PoE priority of GigabitEthernet 1/0/8 to critical.

[SwitchA] interface GigabitEthernet 1/0/8

[SwitchA-GigabitEthernet1/0/8] poe enable

[SwitchA-GigabitEthernet1/0/8] poe priority critical

[SwitchA-GigabitEthernet1/0/8] quit

# Set the PoE management mode on the device to auto (it is the default mode, so this step can be omitted).

[SwitchA] poe power-management auto

# Enable the PD compatibility detect of the device to allow the device to supply power to part of the devices noncompliant with the 802.3af standard.

[SwitchA] poe legacy enable

 

Introduction to PoE Profile

On a large-sized network or a network with mobile users, to help network administrators to monitor the PoE features of the device, the device provides the PoE profile features. A PoE profile is a set of PoE configurations, including multiple PoE features.

Features of PoE profile:

l          Various PoE profiles can be created. PoE policy configurations applicable to different user groups are stored in the corresponding PoE profiles. These PoE profiles can be applied to the ports used by the corresponding user groups.

l          When users connect a PD to a PoE-profile-enabled port, the PoE configurations in the PoE profile will be enabled on the port.

PoE Profile Configuration

Configuring PoE Profile

Follow these steps to configure PoE profile:

To do…			Use the command…	Remarks
Enter system view			system-view	—
Create a PoE profile and enter PoE profile view			poe-profile profilename	Required If the PoE file is created, you will enter PoE profile view directly through the command.
Configure the relevant features in PoE profile	Enable the PoE feature on a port		poe enable	Required Disabled by default.
	Configure PoE mode for Ethernet ports		poe mode { signal | spare }	Optional signal by default.
	Configure the PoE priority for Ethernet ports		poe priority { critical | high | low }	Optional low by default.
	Configure the maximum power for Ethernet ports		poe max-power max-power	Optional 15,400 mW by default.
Quit system view			quit	—
Apply the existing PoE profile to the specified Ethernet port	In system view		apply poe-profile profile-name interface interface-type interface-number [ to interface-type interface-number ]	Use either approach.
	In Ethernet port view	Enter Ethernet port view	interface interface-type interface-number
		Apply the existing PoE profile to the port	apply poe-profile profile-name

 

Note the following during the configuration:

1)        When the apply poe-profile command is used to apply a PoE profile to a port, some PoE features in the PoE profile can be applied successfully while some cannot. PoE profiles are applied to the devices according to the following rules:

l          When the apply poe-profile command is used to apply a PoE profile to a port, the PoE profile is applied successfully only if one PoE feature in the PoE profile is applied properly. When the display current-configuration command is used for query, it is displayed that the PoE profile is applied properly to the port.

l          If one or more features in the PoE profile are not applied properly on a port, the device will prompt explicitly which PoE features in the PoE profile are not applied properly on which ports.

l          The display current-configuration command can be used to query which PoE profile is applied to a port. However, the command cannot be used to query which PoE features in a PoE profiles are applied successfully.

2)        PoE profile configuration is a global configuration, and applies synchronously in the intelligent resilient framework (IRF) system.

3)        Combination of Unit creates a new Fabric. In the newly created Fabric, the PoE profile configuration of the Unit with the smallest Unit ID number will become the PoE profile configuration for the Fabric currently in use.

4)        Split of Fabric results in many new Fabrics. In each newly created Fabric, the PoE profile configuration of each Unit remains the same as it was before the split.

Displaying and Maintaining PoE Profile Configuration

To do…	Use the command…	Remarks
Display the detailed information about the PoE profiles created on the device	display poe-profile { all-profile | interface interface-type interface-number | name profile-name }	Available in any view

 

PoE Profile Configuration Example

PoE Profile Application Example

Network requirements

As shown in Figure 2-1, Switch A supports PoE.

GigabitEthernet 1/0/1 through GigabitEthernet 1/0/10 of Switch A are used by users of group A, who have the following requirements:

l          The PoE function can be enabled on all ports in use.

l          Signal mode is used to supply power.

l          The PoE priority for GigabitEthernet 1/0/1 through GigabitEthernet 1/0/5 is Critical, whereas the PoE priority for GigabitEthernet 1/0/6 through GigabitEthernet 1/0/10 is High.

l          The maximum power for GigabitEthernet 1/0/1 through GigabitEthernet 1/0/5 ports is 3,000 mW, whereas the maximum power for GigabitEthernet 1/0/6 through GigabitEthernet 1/0/10 is 15,400 mW.

Based on the above requirements, two PoE profiles are made for users of group A.

l          Apply PoE profile 1 for GigabitEthernet 1/0/1 through GigabitEthernet 1/0/5;

l          Apply PoE profile 2 for GigabitEthernet 1/0/6 through GigabitEthernet 1/0/10.

Figure 2-1 PoE profile application

 

Configuration procedure

# Create Profile1, and enter PoE profile view.

<SwitchA> system-view

[SwitchA] poe-profile Profile1

# In Profile1, add the PoE policy configuration applicable to GigabitEthernet 1/0/1 through GigabitEthernet 1/0/5 ports for users of group A.

[SwitchA-poe-profile-Profile1] poe enable

[SwitchA-poe-profile-Profile1] poe mode signal

[SwitchA-poe-profile-Profile1] poe priority critical

[SwitchA-poe-profile-Profile1] poe max-power 3000

[SwitchA-poe-profile-Profile1] quit

# Display detailed configuration information for Profile1.

[SwitchA] display poe-profile name Profile1

Poe-profile: Profile1, 3 action

poe enable

poe max-power 3000

poe priority critical

# Create Profile2, and enter PoE profile view.

[SwitchA] poe-profile Profile2

# In Profile2, add the PoE policy configuration applicable to GigabitEthernet 1/0/6 through GigabitEthernet 1/0/10 ports for users of group A.

[SwitchA-poe-profile-Profile2] poe enable

[SwitchA-poe-profile-Profile2] poe mode signal

[SwitchA-poe-profile-Profile2] poe priority high

[SwitchA-poe-profile-Profile2] poe max-power 15400

[SwitchA-poe-profile-Profile2] quit

# Display detailed configuration information for Profile2.

[SwitchA] display poe-profile name Profile2

Poe-profile: Profile2, 2 action

poe enable

poe priority high

# Apply the configured Profile1 to GigabitEthernet 1/0/1 through GigabitEthernet 1/0/5 ports.

[SwitchA] apply poe-profile Profile1 interface GigabitEthernet1/0/1 to GigabitEthernet1/0/5

# Apply the configured Profile2 to GigabitEthernet 1/0/6 through GigabitEthernet 1/0/10 ports.

[SwitchA] apply poe-profile Profile2 interface GigabitEthernet1/0/6 to GigabitEthernet1/0/10