PoE/PoE+ Planning and Implementation Guide 2011-09

12-5
Planning and Implementation for the E3800 Switches
Planning Your PoE or PoE+ Configuration
HP E3800-48G-PoE+-4SFP+ or HP E3800-48G-PoE+-
4XG Switch Configurations
The table in this example configuration contains entries that show the PoE/
PoE+ power available for the E3800-48G-PoE+-4SFP+ or E3800-48G-PoE+-
4XG Switch when using only one power supply.
PoE power requirements are figured differently for the E3800-48G-PoE+-
4SFP+ or E3800-48G-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.
Figure 12-3. Example of a E3800-48G-PoE+-4SFP+ or E3800-48G-PoE+-4XG Switch
with one power supply installed
In this configuration there is no backup if the power supply fails. All switch
power and PoE power will be lost.
Up to 17 ports can supply 30
watts of PoE+
or
33 ports can supply up to 15.4
watts of PoE power
Source of
Power
Watts
Available
# of Ports Powered and
Average watts/Port
Redundant # of Ports
Powered and Average watts/
Port
One 1000 watt
Power Supply
185 W for
system use,
and 515 W for
PoE+ @ 110 V
17 @ average 30 W each for
a total of 510 W
33 @ average 15.4 W each
48 @ average 7.5 W each
None