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

ManualsBrandsHP ManualsNetwork HardwareHP 5412R-92G-PoE+/2SFP+ (No PSU) v2 zl2 Switch
919293949596979899100
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Planning and Implementation for the HP 3500-PoE yl Switches
Introduction
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.
Note The dual-personality ports have either auto-sensing 10/100/1000Base-T RJ-45
or SFP connectivity. The SFP ports do not support PoE. If any of the SFP ports
are used, the corresponding RJ-45 port will not be supplied with PoE power.
Power Redundancy for the HP 3500-PoE yl Switches
The internal power supply in these switches provides both the 12V (RPS) and
50V (EPS) circuits. If the 50V portion of the power supply fails, it will only shut
down the PoE connections. However, if the 12V portion of the power supply
fails, it will shut down the entire switch. Therefore it is important to provide
a redundant power supply for both the 12V and 50V circuits. It is recommended
that both EPS and RPS be connected to provide full redundancy.
The HP 3500-PoE yl Switches can be connected to an HP 620 RPS/EPS
(J8696A) 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 two
switches are connected to the RPS ports and both switches lose power at the
same time, they both receive redundant power. The HP 620 RPS/EPS unit can
provide all the power necessary to keep two switches running.
If maximum PoE power is to be used on all 48 ports, it becomes necessary to
connect an HP 620 RPS/EPS, since the internal power supply only has enough
power to supply 24 ports with maximum wattage. In this case, there is no
redundancy.
HP 3500-PoE+ yl Switches
The HP 3500-48G-PoE+ yl Switch (J9311A) has 44 PoE-integrated auto-
sensing 10/100/1000Base-T RJ-45 ports with four dual-personality gigabit
uplink ports.