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

10-6
Planning and Implementation for the HP 3500-PoE Switches
Planning the PoE Configuration
can supply system power to keep the switch powered on and PoE power to
supply the attached PoE devices with power.
HP 3500-48-PoE Switch Configuration
PoE power requirements are determined differently for the HP 3500-48-PoE
Switch. In the default configuration PoE power priority is determined by port
number, with the lowest numbered port (port 1) having the highest priority,
and the highest numbered port (port 48) having the lowest priority.
Note The ports configured with the highest priority of either bank (1-24 or 25-48)
receive PoE power first. For example, if the highest priority ports have been
re-configured to be 23, 24 and 47, 48, then they will receive PoE power before
the lower priority ports.
Figure 10-3. Example of an HP 3500-48-PoE Switch
Source of
Power
Watts
Available
Number of Ports Powered
and Average watts/Port from
internal supply
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
Internal plus
External PoE
Power Supply
398 + 388 24 @ 15.4 W each for a total
of 369.6 W
24 @ average 15.4 W each
for a total of 369.6 W
External PoE
Power Supply
(failed Internal
PoE Power
Supply)
388 24 @ average 15.4 W each for
a total of 369.6 W
None
24 ports can receive up to 15.4
watts of PoE power
or
48 ports can receive up to 7.0
watts of PoE power