9-3
Planning and Implementation for the 3500yl Switches
Planning Your PoE or PoE+ Configuration
Planning and
Implementation for the
3500yl Switches
The table in this example configuration contains entries that show the PoE
power available for the 3500yl-24G-PWR when connected to an external power
supply.
Figure 9-2. Example of two 3500yl-24G-PWR Switches connecting to a HP
ProCurve 620 External and Redundant Power Supply (J8696A)
The same considerations apply for the mini-GBIC ports as in the previous
example.
Two 3500yl-24G-PWR switches or two 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.
3500yl 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 @ average 15.4 W each
and 24 @ 7.5 W each
or
36 @ average 15.4 W each
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
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