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

8-8
Planning and Implementation for the HP 2910-PoE+ al Switches
Planning the PoE Configuration
The table in this example configuration contains entries that show the PoE+
power available for the HP 2910-48G-PoE+ al Switch when connecting to an
external power supply.
Figure 8-4. Example of an HP 2910-48G-PoE+ al Switch connecting to an
HP 630 RPS/EPS
1
The HP 630 RPS/EPS power supply is rated at 398 watts, however, 388 watts are supplied to
the switch due to line loss on the EPS cable.
The switch can receive redundant power from the HP 630 RPS/EPS should
the switch’s internal power supply fail.
HP 2910al 48 port
switch
HP 630 RPS/EPS
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
382 25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None
Internal plus
External PoE+
power Supply
382 + 388
1
1 - 24 25 - 48
24 @ average 30.0 W each for
a total of 720
48 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
24 @ average 30.0 W each for
a total of 360 W
48 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
External PoE+
Power Supply
(failed Internal
Power Supply)
388
1
12 @ average 30W each for a
total of 360 W
25 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each
None