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Power Over Ethernet (PoE) Operation for the Series 2600-PWR Switches
General PoE Operation
Disconnecting a PD from a port causes the switch to stop providing PoE power
to that port and makes the power available to other ports configured for PoE
operation. If the PoE demand becomes greater than the available power, the
switch transfers power from lower-priority ports to higher-priority ports.
(Ports not currently providing power to PDs are not affected.)
Note 15.4 watts of available power is required for the switch to begin delivering
power to a port, such as when a newly connected PD is detected or when
power is released from higher priority ports. Depending on power demands,
lower-priority ports on a switch with high PoE power demand may occasion-
ally lose power due to the demands of higher-priority ports. (Refer to
“Power
Priority” on page 11-7.)
Table 1. Port-Group Maximum Power Allocations
PoE Power PoE for Switch 2626-PWR PoE for Switch 2650-PWR
Sources
Internal Only 406 watts available to ports 1-24. 406 watts available to ports 1-48.
Internal and redundant 408/204* watts 406 watts available to ports 1-24
EPS available to ports 1-24. Only if the (provided by the internal source).
internal power supply fails. 408/204* watts available to ports
25-48 (provided by the EPS
source).
EPS Only 408/204* watts available to ports
1-24. (The EPS provides PoE
power to ports 1-24 only if the
internal power supply fails.)
The internal power supply has
failed, and the EPS provides 408/
204* watts to ports 1-48. Note that
38 watts of this power are always
allocated exclusively to ports 1-24
or 25-48.)
* If both EPS ports on the HP 600 RPS/EPS or both ports of a pair on the HP 610 EPS
are connected to switches, each switch can receive 204 watts of power. If a single
switch is connected to the EPS ports, that switch can receive 408 watts.
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 or HP 610 EPS unit may be less than the number of
ports powered when both the switch and the HP 600 RPS/EPS or HP 610 EPS
unit are supplying power. In the default configuration the number and location
of ports with redundant PoE power is determined by three factors:
11-6