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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

ignore-dcd — interface

Synopsis

ignore-dcd
no ignore-dcd

Configures

Determination of a link’s status

Default

A DTE serial interface monitors the DCD signal

Description

This command tells the interface to ignore the DCD signal and use the DSR signal to determine whether the link is up or down. By default, all DTE serial interfaces monitor the DCD signal for the link’s status.

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