Power Inline - Cisco Catalyst 3550 Command Reference Manual

power inline

Use the power inline delay shutdown seconds initial seconds command for certain IEEE-compliant
powered devices that require multiple reloads during initialization. With this setting, the switch
continues to provide power during initialization. Without the delay shutdown keywords, the switch
immediately removes power when linkdown occurs on the connected device.
When the switch is connected to a Cisco powered device, the delay shutdown keywords are not needed.
Although you can configure a delay shutdown time, it does not take any action on a connected Cisco
device.
To avoid product damage, you should not connect any device that is not IEEE-compliant during the
Caution
delay shutdown time interval. When the delay shutdown keywords are active on a port, the port remains
powered after unplugging the IEEE-compliant powered device for the configured time interval.
The initial time period begins when the IEEE-compliant powered device is detected by the switch. If
linkdown occurs on the connected device during the initial time period, the shutdown time determines
how long the switch continues to provide power to the device.
Use the no power inline delay shutdown seconds initial seconds interface configuration command to
return to the default setting.
Examples This example shows how to disable PoE detection and to not power a PoE port:
Switch(config-if)# power inline never
This example shows how to enable PoE detection and to automatically power a PoE port:
Switch(config-if)# power inline auto
This example shows how to configure a shutdown time delay for an IEEE powered device:
Switch(config-if)# power inline delay shutdown 20 initial 90
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands Command
show interfaces
properties
show power inline
Catalyst 3550 Multilayer Switch Command Reference
2-290
Description
transceiver Displays the inline power status for a PoE port.
Displays the power status for the specified PoE port or for all
PoE ports.
Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
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