3Com MSR 50 Series Configuration Manual page 196

196 C 6: DCC C
HAPTER ONFIGURATION
[RouterA-Serial2/0] physical-mode async
[RouterA-Serial2/0] async mode protocol
[RouterA-Serial2/0] dialer enable-circular
[RouterA-Serial2/0] dialer-group 1
[RouterA-Serial2/0] dialer route ip 100.1.1.2 8810052
[RouterA-Serial2/0] link-protocol ppp
[RouterA-Serial2/0] ppp pap local-user usera password simple usera
# Specify interface Serial 2/0 as the callback client.
[RouterA-Serial2/0] ppp callback client
[RouterA-Serial2/0] dialer timer enable 15
[RouterA-Serial2/0] quit
# Configure the user interface to be used and enable modem dialup on it.
[RouterA] user-interface tty1
[RouterA-ui-tty1] modem both
4 Configure Router B
# Configure a dial access control rule for dialer access group 2; create a local user
account usera for Router A and configure PPP authentication for it; and configure
the dial string for callback.
<RouterB> system-view
[RouterB] dialer-rule 2 ip permit
[RouterB] local-user usera
[RouterB-luser-usera] password simple usera
[RouterB-luser-usera] service-type ppp
[RouterB-luser-usera] service-type ppp callback-number 8810048
[RouterB-luser-usera] quit
# Assign an IP address to interface Serial 2/0, and configure physical and C-DCC
parameters.
[RouterB] interface serial 2/0
[RouterB-Serial2/0] ip address 100.1.1.2 255.255.255.0
[RouterB-Serial2/0] physical-mode async
[RouterB-Serial2/0] async mode protocol
[RouterB-Serial2/0] dialer enable-circular
[RouterB-Serial2/0] dialer-group 2
[RouterB-Serial2/0] dialer route ip 100.1.1.1 user usera 8810048
# Specify the local end as the callback server, and set the callback reference to dial
number. In this case, DCC identifies the dial string for callback by comparing the
remote username obtained through PPP authentication against the local user
database for a match.
[RouterB-Serial2/0] dialer callback-center dial-number
[RouterB-Serial2/0] link-protocol ppp
[RouterB-Serial2/0] ppp authentication-mode pap
[RouterB-Serial2/0] ppp callback server
[RouterB-Serial2/0] quit
# Configure the user interface to be used and enable modem dialup on it.