HP PROCURVE 2520 Planning And Implementation Guide

8-4
Planning and Implementation for the 3500 Switches
Planning Your PoE Configuration
Planning and
Implementation for the 3500
Switches
HP ProCurve 3500-48-PoE Switch Configuration
PoE power requirements are determined differently for the HP ProCurve 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 8-3. Example of an HP ProCurve 3500-48-PoE Switch
The lowest loaded bank of ports (1-24 or 25-48) has 22 watts reserved. That
power is available for use by the two highest priority ports in the bank, (in a
default configuration ports 1 and 2, or 25 and 26).
For example, the switch starts with 398 watts. Then it reserves 22 watts per
bank leaving 354 watts total for allocation. If ports 1-24 are chosen to be used
then the 22 watts that was held in reserve for that bank of ports will be added
back in for a total of 376 watts.
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
Source of
Power
Watts
Available
# of Ports Powered and
Average watts/Port
Redundant # of Ports
Powered and Average watts/
Port
Internal PoE
Power
Supply
398 25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None

HP PROCURVE 2520 Specifications

General

Brand	HP
Model	PROCURVE 2520
Category	Software
Language	English