Chapter 8 Configuring Power Over Ethernet; Power Management Modes - Cisco 4500M Software Manual

Configuring Power over Ethernet
Note Before reading this chapter, read "Preparing for Installation" section of the
Catalyst 4500 Series Installation Guide. It is important to ensure that your installation site has enough
power and cooling to accommodate the additional electrical load and heat introduced by PoE.
This chapter describes how to configure Power over Ethernet (PoE) on the Catalyst 4500 series switch.
This chapter contains the following sections:
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Catalyst 4500 series switches can sense if a powered device is connected to a PoE module. They can
supply PoE to the powered device if there is no power on the circuit. (If there is power on the circuit, the
switch does not supply it.) The powered device can also be connected to an AC power source and supply
its own power to the voice circuit.
A powered device is any device connected to the switch that requires external power or can utilize PoE,
Note
for example, an access point or Cisco IP phone.
For complete syntax and usage information for the switch commands used in this chapter, refer to the
Note
Catalyst 4500 Series Switch Cisco IOS Command Reference and related publications at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/index.htm.

Power Management Modes

If your switch has a module capable of providing PoE to end stations, you can set each interface on the
module to automatically detect and apply PoE if the end station requires power.
OL-6696-01
Power Management Modes, page 8-1
Configuring Power Consumption for Powered Devices on an Interface, page 8-3
Displaying the Operational Status for an Interface, page 8-6
Displaying the PoE Consumed by a Module, page 8-7
C H A P T E R
Software Configuration Guide—Release 12.2(25)EW
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