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

7-7
Planning and Implementation for the HP 2620-PoE+ Switches
Planning the PoE Configuration
One HP 2620-24-PoE+ switch can be supported by one HP 630 RPS/EPS. This
is a full redundant configuration. The switch can be supplied with power
should the internal power supply fails. The HP 630 RPS/EPS can supply system
power to keep the switch powered on and PoE+ power to supply the attached
PoE+ devices with power.
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.
HP 2620-48-PoE+ Configuration
PoE+ power requirements are figured differently for the HP 2620-48-PoE+
Switch. The table in this example configuration contains entries that show the
PoE+ power available for the HP 2620-48-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 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.
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
Internal PoE+
Power Supply
364 12 @ average 30W each for a
total of 360 W
24 @ average 15.4 W each
24 @ average 7.5 W each
None
Internal plus
External PoE+
Power Supply
364 + 388
1
24 @ average 30.0 W each for
a total of 720
24 @ average 15.4 W each
24 @ average 7.5 W each
12 @ average 30.0 W each
for a total of 360 W
24 @ average 15.4 W each
24 @ average 7.5 W each
External PoE+
Power Supply
(failed Internal
PoE Power
Supply)
388
1
12 @ average 30W each for a
total of 360 W
24 @ average 15.4 W each
24 @ average 7.5 W each
None