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

12-8
Planning and Implementation for the HP 3800-PoE+ Switches
Planning the PoE+ Configuration
HP 3800-48G-PoE+-4SFP+ or HP 3800-48G-PoE+-4XG
Switch Configurations
The table in this example configuration contains entries that show the PoE/
PoE+ power available for the HP 3800-48G-PoE+-4SFP+ or HP 3800-48G-
PoE+-4XG Switch when using only one power supply.
PoE power requirements are figured differently for the HP 3800-48G-PoE+-
4SFP+ or HP 3800-48G-PoE+-4XG Switch. In the default configuration PoE/
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/PoE+ power first. For example, if the highest priority
ports have been configured to be 23, 24 and 47, 48, then they will receive PoE/
PoE+ power before the lower priority ports.
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
Two 1000 watt
Power Supplies
127 W for
system use, and
573 W + 700 W
(for a max of 720
W) for PoE+ @
110 V
24 @ average 30 W each for
a total of 720 W
24 @ average 15.4 W each
24 @ average 7.5 W each
19 @ average 30 W
each for a total of
570 W
Two 1000 watt
Power Supplies
127 W for
system use, and
873 W + 1000 W
(for a max of 720
W) for PoE+ @
220 V
24 @ average 30 W each for
a total of 720 W
24 @ average 15.4 W each
24 @ average 7.5 W each
24 @ average 30 W
each for a total of
720 W