There is a delay when a fixed switch interface alternates between Up and Down consecutively. Why

To prevent the interface from frequently reporting the status change event, run the carrier { up-hold-time | down-hold-time } interval command to set the delay in reporting the status change event.

By default, the delay in reporting a port Up event is 2000 milliseconds, and the delay in reporting a port Down event is 0 milliseconds.

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