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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-03
Chapter 3
Configuring with the Command-Line Interface
Configuring the Digital Modem Network Module for the Cisco 3640 Router
To configure a group asynchronous interface, perform the following tasks, beginning in global
configuration mode:
For more information about group asynchronous interfaces, refer to the “Asynchronous Configuration
Task List” section of the Cisco IOS Release 11.3 Dial Solutions Configuration Guide.
Configure the ISDN Dialer Interface
The ISDN dialer interface is the parent interface that holds the central protocol characteristics for the
ISDN D channels that are part of the dialer-rotary group. To configure the ISDN dialer interface, perform
the following tasks, beginning in global configuration mode:
Command
Description
Step 1
interface group-async
number
Create a group asynchronous interface.
Step 2
ip unnumbered Loopback
number
Enable IP processing on the loopback
interface without assigning an explicit IP
address to the interface.
Step 3
encapsulation ppp
Set the Point-to-Point Protocol (PPP) as the
encapsulation method used by this
interface.
Step 4
async mode interactive
Enable SLIP and PPP EXEC commands on
this interface.
Step 5
peer default ip address pool
name
Specify an IP address from the defined IP
address pool to be returned to a remote peer
connecting to this interface.
Step 6
no cdp enable
Disable CDP on this interface.
Step 7
group-range
start-range
end-range
Associate one or more interfaces to the
group interface so that all associated
interfaces can be configured through the
group interface.
Command
Description
Step 1
interface Dialer
number
Define a dialer rotary group leader.
Step 2
ip unnumbered Loopback
number
Enable IP processing on the loopback interface
without assigning an explicit IP address to the
interface.
Step 3
no ip mroute-cache
Disable IP multicast fast switching.
Step 4
encapsulation ppp
Set the PPP as the encapsulation method used
by this interface.
Step 5
peer default ip address pool
name
Specify an IP address from the defined IP
address pool to be returned to a remote peer
connecting to this interface.