3Com 3C13636 Configuration Manual page 1450

3Com Router 3000 Ethernet Family
Configuration Guide
[3Com] interface serial 0/0/0
[3Com-Serial0/0/0] ip address 100.1.1.1 255.255.255.0
[3Com-Serial0/0/0] physical-mode async
[3Com-Serial0/0/0] dialer enable-circular
[3Com-Serial0/0/0] dialer-group 1
[3Com-Serial0/0/0] dialer route ip 100.1.1.2 8810052
[3Com-Serial0/0/0] link-protocol ppp
[3Com-Serial0/0/0] ppp pap local-user usera password simple usera
[3Com-Serial0/0/0] ppp callback client
[3Com-Serial0/0/0] user-interface tty1
[3Com-ui-tty1] modem
2) Configure RouterB
[3Com] dialer-rule 2 ip permit
[3Com] local-user usera
[3Com-luser-usera] password simple usera
[3Com-luser-usera] service-type ppp
[3Com-luser-usera] quit
[3Com] interface serial 1/0/0
[3Com-Serial1/0/0] ip address 100.1.1.2 255.255.255.0
[3Com-Serial1/0/0] physical-mode async
[3Com-Serial1/0/0] async mode protocol
[3Com-Serial1/0/0] dialer enable-circular
[3Com-Serial1/0/0] dialer-group 2
[3Com-Serial1/0/0] dialer route ip 100.1.1.1 user usera 8810048
[3Com-Serial1/0/0] dialer callback-center user
[3Com-Serial1/0/0] link-protocol ppp
[3Com-Serial1/0/0] ppp authentication-mode pap
[3Com-Serial1/0/0] ppp callback server
[3Com-Serial1/0/0] user-interface tty2
[3Com-ui-tty2] modem
Solution 2: Use C-DCC to implement PPP callback. The server dynamically creates
dialer routes and callbacks the clients according to the dialer numbers.
1) Configure RouterA
[3Com] dialer-rule 1 ip permit
[3Com] interface serial 0/0/0
[3Com-Serial0/0/0] ip address 100.1.1.1 255.255.255.0
[3Com-Serial0/0/0] physical-mode async
[3Com-Serial0/0/0] async mode protocol
[3Com-Serial0/0/0] dialer enable-circular
[3Com-Serial0/0/0] dialer-group 1
[3Com-Serial0/0/0] dialer route ip 100.1.1.2 8810052
[3Com-Serial0/0/0] link-protocol ppp
3Com Corporation
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Chapter 1 DCC Configuration