To place a line into dedicated asynchronous mode using Serial Line Internet Protocol (SLIP) or PPP encapsulation, use the async mode dedicatedcommand in interface configuration mode. To return the line to interactive mode, use the no form of this command.

async mode dedicated

no async mode dedicated

Syntax Description

This command has no arguments or keywords.

Command Default

Asynchronous mode is disabled.

Command Modes

Interface configuration

Command History

Usage Guidelines

With dedicated asynchronous network mode, the interface will use either SLIP or PPP encapsulation, depending on which encapsulation method is configured for the interface. An EXEC prompt does not appear, and the router is not available for normal interactive use.

If you configure a line for dedicated mode, you will not be able to use the async dynamic address command because there is no user prompt.


The following example assigns an IP address to an asynchronous line and places the line into network mode. Setting the stop bits to 1 enhances performance.

interface async 4
 async default ip address
 async mode dedicated
 encapsulation slip
line 20
 location remote computer
 stopbits 1
 speed 115200

Related Commands

Release Modification
10.0 This command was introduced.
Command Description
async dynamic address Specifies dynamic asynchronous addressing.
async mode interactive Returns a line that has been placed into dedicated asynchronous network mode to interactive mode, thereby enabling the slip and ppp EXEC commands.

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