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Planning Your PoE Configuration
HP ProCurve 2650-PWR Configurations
The tables in the two example configurations contain entries that show the
PoE power available when the 2650-PWR is used alone. When used with the
HP 600 RPS/EPS unit, additional PoE power is available to the PoE ports and
PoE power is available should the switch’s internal PoE power supply fail.
Table entries show the PoE power available when the HP 600 RPS/EPS alone
provides PoE power.
In the following examples using the HP ProCurve 2650-PWR switch, reference
is made to two blocks of ports: ports 1-24 and ports 25-48. This applies when
external PoE power is available from an HP 600 RPS/EPS unit. In that case,
the internal switch PoE power supply provides 406 watts of power to ports
1-24 and the HP 600 RPS/EPS provides 368 watts of power to ports 25-48.
If you are using the HP ProCurve Switch 2650-PWR with external PoE power,
the number of ports with available PoE power when the switch is powered by
just the HP 600 RPS/EPS unit may be less than the number of ports powered
when both the switch and the HP 600 RPS/EPS unit are supplying power. In
the default configuration the number and location of ports with redundant
PoE power is determined by three factors:
■ The number of switches drawing external PoE power from the HP 600
RPS/EPS unit. If only a single switch is using external PoE power the HP
600 RPS/EPS provides 368 watts of PoE power. If two switches are using
external PoE power from the HP 600 RPS/EPS, a switch receives 168 watts
of PoE power. Should the switch’s internal PoE power supply fail, the HP
600 RPS/EPS provides power up to the wattage stated above.
■ When the internal PoE power supply fails, no bank of ports, either 1-24 or
25-48, receives all of the external PoE power. The HP 600 RPS/EPS
reserves a minimum of 38 watts for the less-loaded bank of ports. In the
default configuration, at a minimum, the first two ports in the bank (1 and
2 or 25 and 26) will have PoE power.
■ In the default configuration PoE power priority is determined by port
number, with the lowest numbered port having the highest priority.
If redundant PoE power is required, use the example tables to determine how
much power is available to which ports.
Planning
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