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Note�

Term

Use in this Manual

Powered Device. This is an IEEE 802.3af-compliant device that receives

its power through a direct connection to a 10/100Base-TX PoE RJ-45 port

on the switch. Examples of PDs include Voice-over-IP (VoIP) telephones,

wireless access points, and remote video cameras.

port-number

Refers to the type of power prioritization where, within a priority class,

priority

the switch assigns the highest priority to the lowest-numbered port, the

second-highest priority to the second lowest-numbered port, and so-on.

Note that power priority rules apply only if PoE provisioning on the switch

becomes oversubscribed.

PoE

Power-Over-Ethernet; the method by which PDs receive power from the

switch (in compliance with the IEEE 802.3af standard).

PSE

Power-Sourcing Equipment. A PSE, such as a Switch 2626-PWR or 2650-

PWR, provides power to IEEE 802.3af-compliant PDs directly connected

to 10/100Base-TX PoE RJ-45 ports on the switch. The Switch 2626-PWR

and 2650-PWR are endpoint PSEs.

RPS

Redundant Power Supply; for example, an HP 600 RPS/EPS. An RPS

device provides power to a switch if the switch's internal power supply

fails. RPS power does not provision PoE ports on a switch whose internal

power supply has failed. See also "EPS", above.

General PoE Operation

Configuration Options

In the default configuration, all 10/100Base-TX ports on the switch are config

ured to support PoE operation. You can:

■

Disable or re-enable per-port PoE operation on some ports to help

control power usage and avoid oversubscribing PoE on the switch.

Configure per-port priority for allocating power in case the switch

■

becomes oversubscribed and must drop power for some lower-

priority ports to support the demand on other, higher-priority ports.

Configure a global power threshold on the switch to act as a trigger

■

for sending a notice when the switch exceeds or goes below a specific

level of PoE power consumption.

The PoE ports on your switch support standard networking links and PoE

links. Thus, you can connect either a non-PoE device or a PD to a PoE-enabled

port without reconfiguring the port.

General PoE Operation