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

11-9
Planning and Implementation for the HP 3500-PoE yl Switches
Planning the PoE or PoE+ Configuration
HP 3500-48G-PoE yl Switch Configuration
PoE power requirements are figured differently for the HP 3500-48G-PoE yl
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 It is the ports configured with the highest priority of either bank (1-24 or 25-
48) that will 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 11-3. Example of an HP 3500-48G-PoE yl Switch
External PoE
Power Supply
(failed Internal
PoE Power
Supply)
388 24 @ average 15.4 W each for
a total of 369.6 W
None
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
All 25 ports can receive up to 15.4
watts of PoE power
or
48 ports can receive up to 7.5
watts of PoE power
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 25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None