PoE/PoE+ Planning and Implementation Guide 2011-09

10-3
Planning and Implementation for the 3500 Switches
Planning Your PoE Configuration
The table in this example configuration shows the PoE power available for
the HP ProCurve 3500-24-PoE switch when configured with an external power
supply.
Figure 10-2. Example of two HP ProCurve 3500-24-PoE Switches connecting to an
HP ProCurve 620 External and Redundant Power Supply (J8696A)
The same considerations apply for the mini-GBIC ports as in the previous
example.
Two HP ProCurve 3500-24-PoE switches can be supported by one 620 RPS/
EPS. This is a full redundant configuration—both of the switches can be
supplied with power should either of their internal power supplies fail. The
620 RPS/EPS can supply system power to keep the switch powered on and
PoE power to supply the attached PoE devices with power.
3500- 24 port
switches
620 RPS/EPS
Source of
Power
Watts
Available
# of Ports Powered and
Average watts/Port from
internal supply
Redundant # of Ports
Powered and Average
watts/Port
Internal PoE
Power Supply
398 24 @ average 15.4 W each for
a total of 369.6 W
None
Internal plus
External PoE
Power Supply
398 + 388 24 @ 15.4 W each for a total
of 369.6 W
24 @ average 15.4 W each
for a total of 369.6 W
External PoE
Power Supply
(failed Internal
PoE Power
Supply)
388 24 @ average 15.4 W each for
a total of 369.6 W
None