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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
power inline
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.
power inline
{
auto
[
max
max-wattage
] |
neve
r |
static
[
max
max-wattage
]}
no power inline
{
auto
|
never
|
static
}
Syntax Description
Defaults
The default is
auto
(enabled).
The maximum wattage is 15400 milliwatts.
Command Modes
Interface configuration
Command History
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.
Note
The switch never powers any Class 0 or Class 3 device if the
power inline
max
max-wattage
command
is configured for less than 15.4 W.
auto
Enable powered-device detection. If enough power is available,
automatically allocate power to the PoE port after device detection.
max
max-wattage
(Optional) Limit the power allowed on the port. The range is 4000 to
15400 milliwatts. If no value is specified, the maximum is allowed.
never
Disable device detection, and disable power to the port.
static
Enable powered-device detection. Pre-allocate (reserve) power for a port
before the switch discovers the powered device.
Release
Modification
12.1(19)EA1
This command was introduced.
12.2(25)SE
The
static
and
max
max-wattage
options were added.
