Power Inline - Cisco catalyst 3750 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

power inline

Use the power inline interface configuration command to configure the power management mode on
the Power over Ethernet (PoE) ports. Use the no form of this command to return to the default settings.
Syntax Description
auto
max max-wattage
never
static
Defaults The default is auto (enabled).
The maximum wattage is 15400 milliwatts.
Command Modes Interface configuration
Command History Release
12.1(19)EA1
12.2(25)SE
Usage Guidelines This command is supported only on PoE-capable ports. If you enter this command on a port that does
not support PoE, this error message appears:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# power inline auto
% Invalid input detected at '^' marker.
In a switch stack, this command is supported on all ports in the stack that support PoE.
Use the max max-wattage option to disallow higher-power powered devices. With this configuration,
when the powered device sends Cisco Discovery Protocol (CDP) messages requesting more power than
the maximum wattage, the switch removes power from the port. If the powered-device IEEE class
maximum is greater than the maximum wattage, the switch does not power the device. The power is
reclaimed into the global power budget.
The switch never powers any Class 0 or Class 3 device if the power inline max max-wattage command
Note
is configured for less than 15.4 W.
OL-8552-07
power inline {auto [max max-wattage] | never | static [max max-wattage]}
no power inline {auto | never | static}
Enable powered-device detection. If enough power is available,
automatically allocate power to the PoE port after device detection.
(Optional) Limit the power allowed on the port. The range is 4000 to
15400 milliwatts. If no value is specified, the maximum is allowed.
Disable device detection, and disable power to the port.
Enable powered-device detection. Pre-allocate (reserve) power for a port
before the switch discovers the powered device.
Modification
This command was introduced.
The static and max max-wattage options were added.
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Catalyst 3750 Switch Command Reference
power inline
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