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.

Internal and

redundant 408/204* watts

EPS

available to ports 1-24. Only if the

 

internal power supply fails.

406 watts available to ports 1-48.

406 watts available to ports 1-24 (provided by the internal source). 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