156 
# Set interface Serial 2/0 to operate in asynchronous protocol mode, configure information for 
PPP authentication, and assign the interface to dialer bundle 1. 
[RouterC] interface serial 2/0 
[RouterC-Serial2/0] physical-mode async 
[RouterC-Serial2/0] async mode protocol 
[RouterC-Serial2/0] dialer bundle-member 1 
[RouterC-Serial2/0] link-protocol ppp 
[RouterC-Serial2/0] ppp authentication-mode pap 
[RouterC-Serial2/0] ppp pap local-user userc password simple userc 
[RouterC-Serial2/0] quit 
# Configure the user interface to be used and enable modem dial-in and dial-out on it. 
[RouterC] user-interface tty1 
[RouterC-ui-tty1] modem both 
Configuration example for DCC on ISDN 
Network requirements 
Figure 49 presents a scenario for C-DCC implementation, where: 
•  On Router A, interface BRI 1/0 is assigned an IP address 100.1.1.1/24.  
•  On Router B, interface BRI 1/0 is assigned an IP address 100.1.1.2/24.  
•  On Router C, interface BRI 1/0 is assigned an IP address 100.1.1.3/24.  
•  The BRI 1/0 interfaces on these three routers are located on the same network segment.  
Figure 50 p
resents a scenario for RS-DCC implementation, where: 
•  On Router A, interface Dialer 0 is assigned an IP address 100.1.1.1/24 and Dialer 1 an IP 
address 122.1.1.1/24.  
•  On Router B, interface Dialer 0 is assigned an IP address 100.1.1.2/24.  
•  On Router C, interface Dialer 0 is assigned an IP address 122.1.1.2/24.  
•  The Dialer 0 interfaces on Router A and Router B are located on the same network segment, so 
are the Dialer 1 interface on Router A and the Dialer 0 interface on Router C. 
Allow Router A to call Router B and Router C from multiple interfaces, but disable Router B and 
Router C from calling each other in both C-DCC and RS-DCC approaches. 
Figure 49 Network diagram for C-DCC application on ISDN