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

10-5
Planning and Implementation for the HP 3500-PoE Switches
Planning the PoE Configuration
If any of the mini-GBIC ports are used (21-24) the corresponding RJ-45 port
will not be supplied with PoE power. This needs to be taken into consideration
when planning per-port PoE wattage.
For example, if port 24 is used for a mini-GBIC, then J45-port 24 is disabled.
The PoE power that was supplied to RJ45-port 24 is returned to the total
available pool of PoE power.
The table in this example configuration shows the PoE power available for
the HP 3500-24-PoE Switch when configured with an external power supply.
Figure 10-2. Example of two HP 3500-24-PoE Switches connecting to an
HP 620 External and Redundant Power Supply (J8696A)
Note: The same considerations apply for the mini-GBIC ports as in the
previous example.
Two HP 3500-24-PoE Switches can be supported by one HP 620 RPS/EPS. This
is a full redundant configuration—both of the switches can be supplied with
power should either of their internal power supplies fail. The HP 620 RPS/EPS
Source of
Power
Watts
Available
Number of Ports Powered
and Average watts/Port
Redundant Number of Ports
Powered and Average watts/
Port
Internal PoE
Power
Supply
398 24 @ average 15.4 W each for
a total of 369.6 W
None
HP 3500
24 port
switches
HP 620 RPS/EPS