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

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Name

async mode — interface

Synopsis

async mode {dedicated | interactive}
no async mode {dedicated | interactive}

Configures

The mode the user receives when connecting to an async interface

Default

Disabled

Description

The mode can be either dedicated or interactive.

dedicated

The interface is reserved for PPP and SLIP connections. No user prompt ever appears on a dedicated line when a user connects. Instead, the connection parameters are negotiated automatically.

interactive

Users are given a prompt when they connect to this interface. It is up to the user to start PPP or SLIP, or to interact directly with the router from the command prompt. The autoselect command can be used to detect PPP packets on an interactive async line and start PPP automatically. autoselect is not needed on dedicated mode async lines.

Example

On the first interface (async1), we set up a dedicated interface, which means that an IOS prompt doesn’t appear when a user connects to the router through this interface. We make the second interface interactive, allowing the user to enter IOS commands and requiring her to start PPP or SLIP manually.

interface async1
  peer default ip address 10.10.1.1
  async mode dedicated
  encapsulation ppp
!
interface async2
  peer default ip address 10.10.1.2
  async mode interactive

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