Extreme Networks ExtremeWare 7.3.0, Command Reference Manual

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ExtremeWare Software 7.3.0 Command Reference Guide 1899
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Power Over Ethernet Commands
Power over Ethernet (PoE) is an effective method of supplying 48 VDC power to certain types of
powered devices (PDs) through Category 5 or Category 3 twisted pair Ethernet cables. PDs include the
Altitude 300 wireless port, IP telephones, laptop computers, web cameras, and other devices. With PoE,
a single Ethernet cable supplies power and the data connection, reducing costs associated with separate
power cabling and supply. PoE for ExtremeWare includes a method of detection to assure that power is
delivered only to devices that meet the IEEE 802.3af specification for PoE.
Summary of PoE Software Features
The Alpine FM-32Pi PoE Module supports the following PoE software features:
• Configuration and control of the power distribution for PoE at the system (slot) level
• Configuration and control of the power distribution for PoE at the port level
• Real time detection of powered devices on the line
• Monitor and control of PoE fault conditions
• Support for configuring and monitoring PoE status at the port level
• Management of an over-subscribed power budget
Port Power Management
When you connect PDs, the Alpine FM-32Pi PoE Module automatically discovers and classifies those
that are AF-compliant. The following functions are supported for delivering power to specific ports:
• Enabling the port for discovery and classification
• Enabling power delivery to a discovered device
• Enforcing port power limits by denying power to a device that exceeds the power limit
• Enforcing class limits by denying power to a device that exceeds the class limit
• Reporting and tracking port power faults
• Managing power budgets and allocation
For more conceptual information about configuring and managing PoE, see the ExtremeWare Software
User Guide .