Power Inline - Cisco Catalyst 3550 Command Reference Manual

Chapter 2 Catalyst 3550 Switch Cisco IOS Commands

power inline

Use the power inline interface configuration command to enable or disable the Power over Ethernet
(PoE) ports on the Catalyst 3550-24PWR switch. Use the no form of this command to return to the
default settings.
Syntax Description
auto
never
delay {shutdown
seconds initial
seconds}
Defaults The default is auto.
No delay time is configured.
Command Modes Interface configuration
Command History Release
12.1(12c)EA1
12.1(19)EA1
Usage Guidelines This command is supported only on PoE-capable ports. PoE ports were previously referred to as inline
power ports in earlier versions of the command reference.
When you configure a port by using the power inline auto interface configuration command, the port
autonegotiates by using the configured speed and duplex settings to determine the power requirements
of the connected device (whether or not it is a powered device). After the power requirements are
determined, the switch hardcodes the interface by using the configured speed and duplex settings
without resetting the interface.
When you configure a port by using the power inline never command, the command disables the
detection and power for the PoE-capable port, and the port reverts to the configured speed and duplex
settings.
If a port has a Cisco powered device connected to it, you should not use the power inline never
command to configure the port. A false link-up can occur on the port, placing it into an error-disabled
state.
OL-8566-02
power inline {auto | never} | [delay {shutdown seconds initial seconds}]
no power inline
Enable powered-device detection. If enough power is available,
automatically allocate power to the PoE port after device detection.
Disable device detection and disable power to the port.
(Optional) Power shutdown delay time. The keywords have these meanings:
•
•
Modification
This command was introduced.
The delay shutdown seconds initial seconds keywords were added.
shutdown seconds—Time that the switch continues to provide power to
the device after linkdown. The range is 0 to 20 seconds.
initial seconds—Initial time that the power shutdown delay is in effect.
The range is 0 to 300 seconds.
Catalyst 3550 Multilayer Switch Command Reference
power inline
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