Power Inline Consumption - Cisco catalyst 3750 Command Reference Manual

power inline consumption

power inline consumption
Use the power inline consumption global or interface configuration command to override the amount
of power specified by the IEEE classification for the device by specifying the wattage used by each
powered device. Use the no form of this command to return to the default power setting.
The default keyword appears only in the global configuration command.
Note
Syntax Description
wattage
Defaults
The default power on each Power over Ethernet (PoE) port is 15400 milliwatts.
Command Modes Global configuration
Interface configuration
Command History Release
12.2(25)SEC
Usage Guidelines When Cisco powered devices are connected to PoE ports, the switch uses Cisco Discovery Protocol
(CDP) to determine the actual power consumption of the devices, and the switch adjusts the power
budget accordingly. This does not apply to IEEE third-party powered devices. For these devices, when
the switch grants a power request, the switch adjusts the power budget according to the powered-device
IEEE classification. If the powered device is a Class 0 (class status unknown) or a Class 3, the switch
budgets 15400 milliwatts for the device, regardless of the actual amount of power needed. If the powered
device reports a higher class than its actual consumption or does not support power classification
(defaults to Class 0), the switch can power fewer devices because it uses the IEEE class information to
track the global power budget.
By using the power inline consumption wattage configuration command, you can override the default
power requirement specified by the IEEE classification. The difference between what is mandated by
the IEEE classification and what is actually needed by the device is reclaimed into the global power
budget for use by additional devices. You can then extend the switch power budget and use it more
effectively.
For example, if the switch budgets 15400 milliwatts on each PoE port, you can connect only 24 Class 0
powered devices. If your Class 0 device power requirement is actually 5000 milliwatts, you can set the
consumption wattage to 5000 milliwatts and connect up to 48 devices. The total PoE output power
available on a 24-port or 48-port switch is 370,000 milliwatts.
Catalyst 3750 Switch Command Reference
2-438
power inline consumption default wattage
no power inline consumption default
Specify the power that the switch budgets for the port. The range is 4000
to 15400 milliwatts.
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
OL-8552-07