HP PROCURVE 2520 User manual

Power over Ethernet
HP ProCurve Power over Ethernet (PoE/PoE+)
Planning and Implementation Guide

Power over Ethernet (PoE/PoE+)
Planning and Implementation Guide

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Publication Number
5991-8574
February 2010
Applicable Products
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HP ProCurve Switch 2910al-24G-PoE+ (J9146A)
HP ProCurve Switch2910al-48G-PoE+ (J9148A)
HP ProCurve Switch 5406zl (J8697A)
HP ProCurve Switch 5406zl-48G (J8699A)
HP ProCurve Switch 5412zl (J8698A)
HP ProCurve Switch 5412zl-96G (J8700A)
HP ProCurve Switch 3500-24-PoE (J9471A)
HP ProCurve Switch 3500-48-PoE (J9473A)
HP ProCurve Switch 3500yl-24G-PWR (J8762A)
HP ProCurve Switch 3500yl-48G-PWR (J8693A)
HP ProCurve 3500yl-24G-PoE+ Switch (J9310A)
HP ProCurve 3500yl-48G-PoE+ Switch (J9311A)
HP ProCurve Switch zl Power Supply Shelf (J8714A)
HP ProCurve Switch 8206zl (J9475A)
HP ProCurve Switch 8212zl (J8715A)
HP ProCurve Switch 2626-PWR (J8164A)
HP ProCurve Switch 2650-PWR (J8165A)
HP ProCurve Switch 2600-8-PWR with Gigabit
Uplink
(J8762A)
HP ProCurve Switch 2610-24/12PWR (J9086A)
HP ProCurve Switch 2610-24-PWR (J9087A)
HP ProCurve Switch 2610-48-PWR (J9089A)
HP ProCurve Switch xl PoE Module (J8161A)
HP ProCurve 24-Port 10/100/100 PoE+ zl Module (J9307A)
HP ProCurve 20-Port 10/100/1000 PoE+/4-Port
MiniGBIC Module
(J9308A)
HP ProCurve 24-Port 10/100 PoE+ zl Module (J9478A)
HP ProCurve 600 Redundant and
External Power Supply (J8168A)
HP ProCurve 610 External Power Supply (J8169A)
HP ProCurve 620 Redundant and External
Power Supply
(J8696A)
HP ProCurve 630 Redundant and/or External
Power Supply
(J9443A)
HP ProCurve 1500W PoE+ zl Power Supply (J9306A)
HP ProCurve 2520-8-PoE (J9137A)
HP ProCurve 2520-24-PoE (J9138A)
HP ProCurve 2520G-8-PoE (J9298A)
HP ProCurve 2520G-24-PoE (J9299A)

iii
Contents
1 Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Power Through the Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
PoE Capabilities of the Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
HP ProCurve 2520 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
HP ProCurve 2520G Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
HP ProCurve 2600 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
HP ProCurve 2610 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Power Redundancy for the 2600 and 2610 Switches . . . . . . . . . . 1-10
HP ProCurve 2910al Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Power Redundancy for the 2910al Switches . . . . . . . . . . . . . . . . 1-12
HP ProCurve 3500-PoE Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Power Redundancy for the 3500 Switches . . . . . . . . . . . . . . . . . . 1-14
HP ProCurve 3500yl-PWR Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Power Redundancy for the 3500yl PWR Switches . . . . . . . . . . . . 1-15
HP ProCurve 3500yl-PoE+ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Power Redundancy for the 3500yl PoE+ Switches . . . . . . . . . . . 1-16
HP ProCurve 5400zl/8200zl Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Power Redundancy for the5400zl/8200zl Switches . . . . . . . . . . . 1-19
PoE/PoE+ Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Why Mixing Power Supplies is NOT Supported . . . . . . . . . . . . . . 1-20
PoE Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
PoE/PoE+ Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Configuring PoE Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
HP ProCurve PoE and PoE+ Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
HP ProCurve Switch xl PoE Module . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
ProCurve Switch zl 24 port Gig-T PoE Module (J8702A) . . . . . . . . . . 1-23
ProCurve Switch zl 20 port Gig-T + 4 port mGBIC
Module (J8705A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

iv
HP ProCurve 24-Port 10/100/1000 PoE+ zl Module (J9307A) . . . . . . 1-24
HP ProCurve 20-Port 10/100/1000 PoE+/4 Port MiniGBIC
zl Module (J9308A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
HP ProCurve 24-Port 10/100 PoE+ zl Module (J9478A) . . . . . . . . . . . 1-25
Quick Reference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
2 Operating Rules
Overview of Switch PoE Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Configuring PoE/PoE+ Power Using
the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Allocating PoE Power by Class or User-defined
Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Switch Port Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Switch Priority Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
PoE Power Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Line Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
PD Power Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
PD Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Provisioning Power for PoE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
HP ProCurve 2520-PoE Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
HP ProCurve 2600-PWR Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
HP ProCurve 2610-PWR Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
HP ProCurve 2910al PoE+ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
PoE/PoE+ Allocation Using LLDP Information . . . . . . . . . . . . . . 2-15
HP ProCurve 3500-PoE Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
PoE Allocation Using LLDP Information . . . . . . . . . . . . . . . . . . . 2-17

v
HP ProCurve 3500yl PWR Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
PoE/PoE+ Allocation Using LLDP Information . . . . . . . . . . . . . . 2-18
HP ProCurve 3500yl PoE+ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
PoE/PoE+ Allocation Using LLDP Information . . . . . . . . . . . . . . 2-19
HP ProCurve 5400zl/8200zl Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Maximum PoE Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
PoE Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
HP ProCurve Switch xl PoE Module for the 5300xl Switch . . . . . . . 2-23
3 Planning and Implementation for the
2520 and 2520G Switches
Planning the PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
HP ProCurve 2520-8-PoE and 2520G-8-PoE Configurations . . . . . . . . 3-2
HP ProCurve 2520-24-PoE and 2520G-24-PoE Configurations . . . . . . 3-3
4 Planning and Implementation for the
2600-PWR Switches
Planning the PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
ProCurve 2600-8-PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
ProCurve 2626-PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
ProCurve 2650-PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
5 Planning and Implementation for the
2610-PWR Switches
Planning Your PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
ProCurve 2610-24/12PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . 5-2
ProCurve 2610-24-PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
ProCurve 2610-48-PWR Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

vi
6 Planning and Implementation for the Switch xl PoE
module
Planning Your PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
ProCurve Switch PoE xl Module Configurations with
a 600 RPS/EPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
ProCurve Switch PoE xl Module Configurations with
a 610 EPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
7 Planning and Implementation for the
2910al PoE+ Switches
Planning Your PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
ProCurve 2910al-24G-PoE+ Configuration . . . . . . . . . . . . . . . . . . . . . . 7-2
ProCurve 2910al-48G-PoE+ Configuration . . . . . . . . . . . . . . . . . . . . . . 7-4
8 Planning and Implementation for the 3500 Switches
Planning Your PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
HP ProCurve 3500-24-PoE Switch Configuration . . . . . . . . . . . . . . . . . 8-2
HP ProCurve 3500-48-PoE Switch Configuration . . . . . . . . . . . . . . . . . 8-4
9 Planning and Implementation for the 3500yl Switches
Planning Your PoE or PoE+ Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
HP ProCurve 3500yl-24G-PWR Configuration . . . . . . . . . . . . . . . . . . . . 9-2
HP ProCurve 3500yl-48G-PWR Configuration . . . . . . . . . . . . . . . . . . . . 9-4
HP ProCurve 3500yl-24G-PoE+ Configuration . . . . . . . . . . . . . . . . . . . 9-7
HP ProCurve 3500yl-48G-PoE+ Configuration . . . . . . . . . . . . . . . . . . . 9-9
10 Planning and Implementation for the
5400zl/8200zl Switches
Planning Your PoE Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Power Configuration for HP ProCurve 5406zl/8206zl
PoE Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Power Configuration for HP ProCurve 5406zl/8206zl
PoE/PoE+ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Power Configuration for HP ProCurve 5412zl/8212zl
PoE Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

vii
Power Configuration for HP ProCurve 5412zl/8212zl
PoE/PoE+ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Configuration Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
HP ProCurve 5406zl Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
ProCurve 5406zl and 8206zl Configurations using the
Power Supply Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
Example Configuration for HP ProCurve 5406zl With
One PoE/PoE+ Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
Example Configuration for HP ProCurve 8206zl With
One PoE/PoE+ Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16
Example Configuration for HP ProCurve 8206zl with
Two PoE/PoE+ Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
HP ProCurve 8206zl Configurations using the
Power Supply Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
HP ProCurve 5412zl/8212zl Configurations . . . . . . . . . . . . . . . . . . . . 10-18
Standard J8712A Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 10-18
Standard J8713A Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
Mixed J8712A and J8713A Configurations . . . . . . . . . . . . . . . . . 10-25
Using the HP ProCurve 1500W PoE+ zl Power
Supply (J9306A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28
ProCurve 5412zl/8212zl Configurations using the Power
Supply Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-30
11 Infrastructure Requirements
Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Physical Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2
Racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

viii
Glossary
A Planning Considerations
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Specific Considerations for the 2910al-PoE Switches . . . . . . . . . . . . . . . . A-2
Specific Considerations for the 3500-PoE Switches . . . . . . . . . . . . . . . . . A-3
Specific Considerations for the 3500yl-PWR Switches . . . . . . . . . . . . . . . A-4
Specific Considerations for the 3500yl-PoE+ Switches . . . . . . . . . . . . . . . A-5
Specific Considerations for the 5400zl/8200zl Switches . . . . . . . . . . . . . . A-6
Index

1-1
Introduction
1
Introduction
This chapter provides an overview of:
■Power over Ethernet (PoE/PoE+).
■A list of reasons why you might want to implement PoE in your network
environment.
■How PoE supplies power over twisted pair cable.
■The capabilities of the devices used to provide PoE.
Overview
Power over Ethernet technology allows IP telephones, wireless LAN Access
Points and other appliances to receive power as well as data over existing LAN
cabling, without needing to modify the existing Ethernet infrastructure.
Power over Ethernet has become a standard feature of ethernet switches, as
the cost of adding power supplies to the Ethernet switches is small. IEEE
802.3af is an extension to the existing Ethernet standards. It offers the first
truly international standard for power distribution (consider how many
different AC power plugs exist worldwide).
Almost all appliances require both data connectivity and a power supply. Just
as telephones are powered from the telephone exchange through the same
twistedpair that carries the voice, we can now do the same thing with Ethernet
devices.
The technology is bound to make a big impact in the world of embedded
computing. In the realm of embedded computers, where the systems are
increasingly connected to LANs and the internet, the advantages of providing
power and data through a single cable should be obvious. Consider a typical
application: a system for a multi-level car parking garage that includes security
cameras, information signs, call-for-help telephones and vehicle sensors. Such
a system is distributed over a significant area, where main power is not easily
available. A single link to a PoE Ethernet Switch makes implementing this
system less expensive and faster than using a non-PoE switch.

1-2
Introduction
Overview
Introduction
Since the original introduction of PoE, the IEEE has initiated a new project
called 802.3at which is commonly referred to as PoE+. This project enhances
PoE in a couple of very important ways. First, it provides up to 30W of power
to a Powered Device (PD), 25.5 watts to the device and 4.5 for line loss, and
allows this power to also run on cabling designed for 1000BASE-T. Secondly,
it provides a new mechanism for communicating power capability and
requirements using the 802.1ab Link Layer Discovery Protocol (LLDP). This
protocol addition allows PoE+ switches to deliver power more efficiently and
thereby provide power to more devices for a given power supply capacity. The
new standard is going to be a superset of the 802.3af because it provides all
the same functionality, and more. The table below shows the capabilities of
802.3af versus 802.3at.
In order for 802.3at to provide higher power, Class D (Cat5e) or better cables
are required. 802.3at also increases the minimum output voltage of the Power
Source Equipment (PSE) from 44 volts to 50 volts. For this reason, you may
note that ProCurve PoE+ devices use a 54 volt power supply.
Note The detection and classification functions ensure that if two PoE sources are
attached together, power will not be improperly applied.
Classification Discovery
Power to PD Physical Logical
<25.5W 802.3at 802.3at
<12.95W 802.3af
802.3at
802.3at

1-3
Introduction
Overview
Introduction
Power over Ethernet connections to embedded computers will allow a less
expensive installation (no AC cabling, lower labor costs), facilitate updating
the installation and repositioning of end devices (wireless access points,
security cameras, and so forth) without electricians, while maintaining full
control over every node through the internet.
Figure 1-1 shows a typical system implemented to power telephones and
wireless access points. The PoE Ethernet switches are installed to supply
power over the twisted pair LAN cables to run phones or other appliances as
required.
Figure 1-1. Example of a Typical Implementation
5406zl Switch
3500yl-48G-PWR 3500yl-24G-PWR
Wireless
Access
Points
Cameras
Cameras
Phones
Phones
Mitel 3300
IP PBX
Wireless
Access
Points
620 RPS/EPS
Power Supply Shelf

1-4
Introduction
Power Through the Cable
Introduction
Here are some reasons why you might want to do this:
■Simplifies installation and saves space - only one set of wires to bring to
your appliance.
■Saves time and money - there is no need to pay for additional electrical
power runs or to delay your installation schedule to make them.
■Minimal disruption to the workplace - the appliance can be easily moved,
to wherever you can lay a LAN cable.
■Safer - no AC voltages need to be added for additional network devices.
■As well as the data transfer to and from the appliance, you can use SNMP
network management infrastructure to monitor and control the
appliances.
■Appliances can be shut down or reset remotely - no need for a reset button
or power switch.
■When implementing wireless LAN systems it simplifies the radio
frequency (RF) survey task, as the access point can easily be moved and
wired in.
Power Through the Cable
A standard CAT5 Ethernet cable has four twisted pairs. Only two of these pairs
are used for 10Base-T and 100Base-TX data; all four are used for 1000Base-T
data. The specification allows two options for using these cables for power:
■The spare pairs are used. The pair on pins 4 and 5 are connected
together and form the positive supply, and the pair on pins 7 and 8 are
connected and form the negative supply.
■The data pairs are used. Since Ethernet pairs are transformer coupled
at each end, it is possible to apply DC power to the center tap of the
isolation transformer without upsetting the data transfer. In this mode of
operation the pair on pins 1 and 2 and the pair on pins 3 and 6 can be of
either polarity.
The 802.3af standard does not allow both pairs (spare and data) to be used -
a choice must be made. The Power Sourcing Equipment (PSE) applies power
to either set of wires. HP ProCurve Networking switches, as a PSE, supply
PoE power over the “data pair” or, pins 1 and 2, and the pair on pins 3 and 6.
The Powered Device (PD) must be able to accept power from both options
because mid-span equipment must (according to the specification) supply
power over the “spare pair” or pins 4 and 5, and the pair on pins 7 and 8.

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PoE Capabilities of the Products
Introduction
An obvious requirement of the specification is to prevent damage to existing
Ethernet equipment. A discovery process, run from the PSE, examines the
Ethernet cables, looking for devices that comply with the specification. It does
this by applying a small current-limited voltage to the cable and checks for the
presence of a 25k ohm resistor in the remote device. Only if the resistor is
present, will the full wattage be applied, but this is still current-limited to
prevent damage to cables and equipment in fault conditions.
Once discovered, a different voltage is applied, and based upon the current
drawn, the class of device can be determined. This indicates how much power
is to be drawn. The 802.3at standard provides both a physical classification
and a logical classification, which is even more precise.
The PD must continue to draw a minimum current. If it does not (for example,
when the device is unplugged) then the PSE removes the power and the
discovery process begins again.
PoE Capabilities of the Products
These switches are designed to be used primarily in wiring closets directly
connected to computers, printers, and servers to provide dedicated
bandwidth to those devices. Additionally, they support the PoE standard IEEE
802.3af, and the PoE+ IEEE 802.3at standard. They can supply power over a
twisted-pair cable to power devices such as telephones, wireless access
points, IP Gateways, and audio and video remote monitoring.
The HP ProCurve PoE switch devices are multi-port switches that can be used
to build high-performance switched workgroup networks with PoE. These
switches are store-and-forward devices that offer low latency for high-speed
networking. The PoE switches are designed to support Redundant Power
Supply and Power over Ethernet (PoE and/or PoE+) technologies.

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PoE Capabilities of the Products
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HP ProCurve 2520 Switches
The 2520 (J9137A), has 8 Integrated PoE auto-sensing 10/100Base-TX RJ-45
ports with two dual-personality Gigabit Uplink ports.
The 2520 (J9138A), has 24 Integrated PoE auto-sensing 10/100Base-TX RJ-45
ports and two 10/100/1000Base-TX uplink ports, with two dual-personality
Gigabit Uplink ports.
These switches also support some pre-standard PoE devices. For a list of these
devices, see the FAQs for your switch model. This feature must be enabled; it
is not a default feature.
The dual-personality ports have either auto-sensing 10/100/1000Base-T
RJ-45 or mini-GBIC connectivity. The dual-personality ports do not support
PoE.

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PoE Capabilities of the Products
Introduction
HP ProCurve 2520G Switches
The 2520G (J9298A), has 8 Integrated PoE auto-sensing 10/100/1000Base-TX
RJ-45 ports with two dual-personality Gigabit Uplink ports.
The 2520G (J9299A), has 24 Integrated PoE auto-sensing 10/100/1000Base-TX
RJ-45 ports including four dual-personality Gigabit Uplink ports.
These switches also support some pre-standard PoE devices. For a list of these
devices, see the FAQs for your switch model. This feature must be enabled; it
is not a default feature.
The dual-personality ports have either auto-sensing 10/100/1000Base-T
RJ-45 or mini-GBIC connectivity. The dual-personality ports do not support
PoE.

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PoE Capabilities of the Products
Introduction
HP ProCurve 2600 Switches
The 2650-PWR (J8165A), has 48 Integrated PoE auto-sensing 10/100Base-TX
RJ-45 ports with two dual-personality Gigabit Uplink ports.
The 2626-PWR (J8164A), has 24 Integrated PoE auto-sensing 10/100Base-TX
RJ-45 ports with two dual-personality Gigabit Uplink ports.
The 2600-8-PWR with Gigabit Uplink (J8762A), has 8 Integrated PoE auto-
sensing 10/100Base-TX RJ-45 ports with one dual-personality Gigabit Uplink
port. The 2600-8-PWR also supports some pre-standard PoE devices. For a list
of these devices, see the FAQs for your switch model. This feature must be
enabled; it is not a default feature.
The dual-personality ports have either auto-sensing 10/100/1000Base-T
RJ-45 or mini-GBIC connectivity. The dual-personality ports do not support
PoE.
PoE
Power
Fault
Dual-Personality Port:
10/100/1000-T (T) or Mini-GBIC (M)
(Port T is IEEE Auto MDI/MDIX)
Status
Reset Clear Console
PoE-Integrated 10/100-TX Ports (1 - 8)  (Ports are HP Auto-MDIX)
ProCurve
Switch 2600-PWR
J8762A
*Spd mode: off = 10 Mbps, flash = 100 Mbps, on = 1000 Mbps
Link
Mode
LED
Mode
Spd
Act
FDx
Test
EPS
Fan
234
Link Mode
1Link Mode
5678T
Link Mode
PoE
*
M
!Use only one (T or M) for Port 9
RPS

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Introduction
PoE Capabilities of the Products
Introduction
HP ProCurve 2610 Switches
These switches support some pre-standard PoE devices. For a list of these
devices, see the FAQs for your switch model. This feature must be enabled; it
is not a default feature.
The 2610-48-PWR (J9089A), has 48 Integrated PoE auto-sensing
10/100Base-TX RJ-45 ports with four Gigabit Uplink ports.
The 2610-24-PWR (J9087A), has 24 Integrated PoE auto-sensing 10/100Base-
TX RJ-45 ports with four Gigabit Uplink ports.
The 2610-24/12PWR (J9086A), has 12 Integrated PoE auto-sensing 10/100Base-
TX RJ-45 ports with four Gigabit Uplink ports.
For more information, refer to the Management and Configuration Guide on
the ProCurve Web site. To display the list of downloadable manuals, click on
the following link: www.hp.com/go/procurve/manuals.
(You may want to bookmark this Web page for easy access in the future.)

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PoE Capabilities of the Products
Introduction
Power Redundancy for the 2600 and 2610 Switches
The internal power supply in these switches provides both the 12V (RPS) and
50V (EPS) circuits. If either the 12V or 50V fails, the power supply shuts down
which will bring down all switch and PoE connections. Therefore it is
important to provide a redundant power supply for both the 12V and 50V
circuits. Thus when you connect EPS from a 600 RPS/EPS device to one of
the 2600-PWR Switches or one of the 2610-PWR Switches, you should also
connect the RPS as well to provide full redundant power.
The 2600-PWR Switches and 2610-PWR Switches can be connected to a 600
RPS/EPS and receive full redundant power from the RPS part of the unit for
switch operation, if the internal power supply in the switch fails. If multiple
switches are connected to the RPS ports and several switches lose power at
the same time, the switch attached to the lowest RPS port number receives
power. The 600 RPS/EPS unit can provide all the power necessary to keep one
switch running.
EPS power from the 600 RPS/EPS is the PoE capability of the device. It
supplies backup and additional PoE power for the ports of the 2600-PWR and
2610-PWR switches.
The 610 EPS can also be used for this purpose, to supply PoE power only. The
610 EPS cannot supply RPS power, it can only supply PoE power. Refer to
chapter three, four, and five for more information on capabilities and
connectivity of these switches, components and accessories.