Configuring Poe; Overview; Poe Configuration Task List - HP 5500 EI Series Configuration Manual

Configuring PoE

Overview

IEEE 802.3af/802.3at-compliant power over Ethernet (PoE) enables a power sourcing equipment (PSE)
to supply power to powered devices (PDs) through Ethernet interfaces over straight-through twisted pair
cables. Examples of PDs include IP telephones, wireless APs, portable chargers, card readers, Web
cameras, and data collectors. A PD can also use a different power source from the PSE at the same time
for power redundancy.
As shown in
• PoE power—The entire PoE system is powered by the PoE power.
PSE—The PSE supplies power for PDs. A PSE can examine the Ethernet cables connected to PoE
•
interfaces, search for PDs, classify them, and supply power to them. When detecting that a PD is
unplugged, the PSE stops supplying power to the PD. A PSE can be built-in (Endpoint) or external
(Midspan). The switch uses built-in PSEs. To display the mapping between a PSE ID and the slot
number of an interface card, execute the display poe device command.
The PSE ID is the switch member ID × 3 + 1. For example, if the member ID of the device is 3, the
PSE ID of the device is 3 × 3 + 1 = 10.
• PI—An Ethernet interface with the PoE capability is called PoE interface.
PD—A PD receives power from the PSE. You can also connect a PD to a redundant power source for
•
reliability.
Figure 55 PoE system diagram

PoE configuration task list

You can configure PoE settings directly on a PoE interface or by configuring a PoE profile and applying
the PoE profile to PoE interfaces.
Figure 55, a PoE system comprises the following elements:
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