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

11-5
Planning and Implementation for the HP 3500-PoE yl Switches
PoE Provisioning
PoE/PoE+ Allocation Using LLDP Information
You can have the port automatically configure certain PoE link partner devices
if the devices supports advertising of its PoE needs. By enabling PoE LLDP
detection, available information about the power usage of the PD will be used
by the switch to configure the power allocation. The default configuration is
for PoE information to be ignored if detected through LLDP.
For more configuration information, refer to the Management and
Configuration Guide for your switch at www.hp.com/networking/support. Auto
search on “3500”, select your switch model from the list, and click Display
selected. Then click on the links that have “Manuals” in them to get to the web
page that lists the available manuals.
HP 3500-PoE+ yl Switches
■ The HP 3500-24G-PoE+ yl Switch can supply up to 398 watts of PoE power
across ports 1-24 for PoE+ applications compatible with the IEEE 802.3at
standard.
■ The HP 3500-48G-PoE+ yl Switch can supply up to 398 watts of PoE power
across ports 1-48 for PoE+ applications compatible with the IEEE 802.3at
standard. This reduces the average per port wattage by half as compared
to the HP 3500-24G-PoE+ yl Switch
An external power supply, the HP 630 Redundant and/or External (HP 630
RPS/EPS) power supply (J9443A
) can be connected to either of the 3500-PoE+
yl Switches to provide redundant or extra PoE+ power. The HP 630 RPS/EPS
provides up to 388 watts of PoE+ power at 54 volts. The 630 RPS/EPS power
supply is rated at 398 watts, however, 388 watts are supplied to the switch due
to line loss on the EPS cable.
Table 11-2. PoE Power Provisioning for the 3500-PoE+ yl Switches
PoE Devices Internal Only Internal and External External Only
PoE for 3500-24G-PoE+
yl Switch
398 watts available
to ports 1-24.
786 watts available to ports 1-24
(provided by the internal and
external source). 388 watts
available as backup in case of
failure, provided by the external
source.
If the switch’s internal power
supply has failed, 388 watts
available to ports 1-24 from the
external source.
PoE for 3500-48G-PoE+
yl Switch
398 watts available
to ports 1-48.
786 watts available to ports 1-48
(provided by the internal and
external source).
If the switch’s internal power
supply has failed, 388 watts
available to ports 1-48 from the
external source.