3Com 3C13636 Configuration Manual page 1442

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com-Serial0/0/0] physical-mode async
[3Com-Serial0/0/0] async mode protocol
[3Com-Serial0/0/0] dialer bundle-member 1
[3Com-Serial0/0/0] link-protocol ppp
[3Com-Serial0/0/0] ppp authentication-mode pap
[3Com-Serial0/0/0] ppp pap local-user userc password simple userc
# Configure the user-interface to enable dial-up mode.
[3Com-Serial0/0/0] user-interface tty1
[3Com-ui-tty1] modem
Solution 3: Use C-DCC to set up a connection vial ISDN BRI or PRI and configure DCC
parameters on the physical interface.
1) Configure RouterA
# Configure dial-up ACL.
[3Com] dialer-rule 1 ip permit
# Configure Bri0/0/0 interface address, enable C-DCC and the DCC to the remote end.
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 100.1.1.1 255.255.255.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer-group 1
[3Com-Bri0/0/0] dialer route ip 100.1.1.2 8810052
[3Com-Bri0/0/0] dialer route ip 100.1.1.3 8810063
2) Configure RouterB
# Configure dial-up ACL.
[3Com] dialer-rule 2 ip permit
# Configure Bri0/0/0 interface address, enable C-DCC and the DCC to the remote end.
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 100.1.1.2 255.255.255.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer-group 2
[3Com-Bri0/0/0] dialer route ip 100.1.1.1 8810048
3) Configure RouterC
# Configure dial-up ACL.
[3Com] dialer-rule 1 ip permit
# Configure Bri0/0/0 interface address, enable C-DCC and the DCC to the remote end.
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 100.1.1.3 255.255.255.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer-group 1
3Com Corporation
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Chapter 1 DCC Configuration