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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring the Digital Modem Network Module for the Cisco 3640 Router
Configure the Default IP Pool Information
You need to set a range of IP addresses in the default IP pool. These IP addresses are used for dial-in
users. To set the range of addresses, perform the following task in global configuration mode:
For more information about defining IP pool information, refer to the Cisco IOS Release 11.3 Network
Protocols Configuration Guide, Part 1.
Configure Modem Lines for Dial-In and Dial-Out
The final task in configuring the MICA digital modem network modules is to configure the modem lines
for dial-in and dial-out.
Configure the Modem for Dial-In
To configure the modem lines for dial-in, perform the following tasks, beginning in global configuration
mode:
Configure the Modem for Dial-Out
To configure the modem lines for dial-out, perform the following tasks, beginning in global
configuration mode:
Command Description
Step1
ip pool local default
low-ip-address
[high-ip-address]
Set the range of addresses in the default IP pool to
be assigned to inbound callers.
Step2
ip default gateway number
Define a default gateway (router) when IP routing
is disabled.
Step3
ip classless
Forward packets destined for a subnet of a
network that has no network default route.
Command Description
Step1
line start-range end-range
Select the modem lines for dial-in and switch to the line
configuration mode.
Step2
autoseect during-login
Set the router to display a login prompt to modem
callers.
Step3
autoselect ppp
Set the router to shift automatically to PPP mode if it
detects an incoming PPP packet.
Step4
modem inout
Configure the line for both incoming and outgoing calls.
Command Description
Step1
line start-range
end-range
Select the modem lines for dial-out and switch to
the line configuration mode.
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