1194 CHAPTER 93: POE CONFIGURATION
■ PSE
PSE is a module or subcard. PSE manages its own PoE interfaces independently.
PSE examines the Ethernet cables connected to PoE interfaces, searches for the
devices, classifies them, and supplies power to them. When detecting that a PD is
unplugged, the PSE stops supplying power to the PD.
An Ethernet interface with the PoE capability is called PoE interface. Currently, a
PoE interface can be an FE or GE interface.
■ PD
A PD is a device accepting power from the PSE. There are standard PDs and
nonstandard PDs. A standard PD refers to the one that complies with IEEE 802.3af.
The PD that is being powered by the PSE can be connected to other power supply
units for redundancy backup.
Protocol Specification The protocol specification related to PoE is IEEE 802.3af.
PoE Configuration
Task List
Complete these tasks to configure PoE:
Configuring the PoE
Interface
You can configure a PoE interface in either of the following two ways:
■ Adopting the command line.
■ Configuring a PoE configuration file and applying the file to the specified PoE
interface(s).
Usually, you can adopt the command line to configure a single PoE interface, and
adopt a PoE configuration file to configure multiple PoE interfaces at the same
time.
c
CAUTION: You can adopt either mode to configure, modify, or delete a PoE
configuration parameter under the same PoE interface.
The PSE supplies power for a PoE interface in the following two modes:
■ For a device with only signal cables, power is supplied over signal cables.
■ For a device with spare cables and signal cables, power can be supplied over
spare cables or signal cables.
Task Remarks
“Configuring the PoE Interface” on page 1194 Required
“Configuring PD Power Management” on page 1196 Optional
“Configuring a Power Alarm Threshold for the PSE” on page 1197 Optional
“Upgrading PSE Processing Software Online” on page 1197 Optional
“Configuring a PD Disconnection Detection Mode” on page 1198 Optional
“Enabling the PSE to Detect Nonstandard PDs” on page 1198 Optional
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