Specifications

Configuring Asynchronous Lines and Interfaces
How to Configure Asynchronous Interfaces and Lines
DC-19
Cisco IOS Dial Technologies Configuration Guide
Configuring a Typical Asynchronous Interface
To configure an asynchronous interface, use the following commands beginning in global configuration
mode:
The “Interface and Line Configuration Examples” and “Asynchronous Interface As the Only Network
Interface Example” sections later in this chapter contain examples of how to configure an asynchronous
interface.
Monitoring and Maintaining Asynchronous Connections
This section describes the following monitoring and maintenance tasks that you can perform on
asynchronous interfaces:
• Monitoring and maintaining asynchronous activity
• Debugging asynchronous interfaces
• Debugging PPP
Command Purpose
Step 1
Router(config)# interface async number
Brings up a single asynchronous interface and enters
interface configuration mode.
Step 2
Router(config-if)# description description
Provides a description for the interface.
Step 3
Router(config-if)# ip address address mask
Specifies an IP address.
Step 4
Router(config-if)# encapsulation ppp
Enables PPP to run on the asynchronous interfaces in the
group.
Step 5
Router(config-if)# async default routing
Enables the router to pass routing updates to other routers
over the AUX port configured as an asynchronous interface.
Step 6
Router(config-if)# async mode dedicated
Places a line into dedicated asynchronous mode using Serial
Line Internet Protocol (SLIP) or PPP encapsulation.
Step 7
Router(config-if)# dialer in-band
Specifies that dial-on-demand routing (DDR) is to be
supported.
Step 8
Router(config-if)# dialer map protocol
next-hop-address
Configures a serial interface to call one or multiple sites or
to receive calls from multiple sites.
Step 9
Router(config-if)# dialer-group
Controls access by configuring an interface to belong to a
specific dialing group.
Step 10
Router(config-if)# ppp authentication chap pap
list-name
Enables Challenge Handshake Authentication Protocol
(CHAP) and Password Authentication Protocol (PAP)
authentication on the interface. Replace the list-name
variable with a specified authentication list name.
1
1. To create a string used to name the following list of authentication methods tried when a user logs in, refer to the aaa authentication ppp
command. Authentication methods include RADIUS, TACACS+, and Kerberos.
Step 11
Router(config-if)# exit
Return to global configuration mode.