Name
down-when-looped — interface
Synopsis
down-when-looped no down-when-looped
Configures
Loopback detection
Default
Disabled
Description
This command tells the interface to go down when a loopback is detected. The default behavior is for the interface to remain up when the device is placed in loopback, so you can place a DCE device such as a CSU/DSU in loopback and ping the interface. This allows you to test the cable between the router and the DCE device.
Use the no form of this command to disable this
behavior. If this command is given, the interface shuts down when the
DCE device (CSU/DSU) is placed in loopback mode.
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