3Com MSR 50 Series Configuration Manual page 519

Dynamic Route Backup Configuration Example 519
[RouterA] interface dialer 0
[RouterA-Dialer0] link-protocol ppp
[RouterA-Dialer0] ip address 20.0.0.1 24
[RouterA-Dialer0] dialer user userb
[RouterA-Dialer0] dialer-group 1
[RouterA-Dialer0] dialer bundle 1
[RouterA-Dialer0] dialer number 8810052
[RouterA-Dialer0] ppp authentication-mode pap
[RouterA-Dialer0] ppp pap local-user usera password simple usera
[RouterA-Dialer0] standby routing-group 1
[RouterA-Dialer0] quit
# Bind BRI 3/0 to Dialer 0.
[RouterA] interface bri 3/0
[RouterA-Bri3/0] dialer bundle-member 1
[RouterA-Bri3/0] ppp authentication-mode pap
[RouterA-Bri3/0] ppp pap local-user usera password simple usera
[RouterA-Bri3/0] quit
# Configure Serial 2/0 and enable X.25 on it.
[RouterA] interface serial 2/0
[RouterA-Serial2/0] link-protocol x25 dte ietf
[RouterA-Serial2/0] x25 x121-address 10
[RouterA-Serial2/0] x25 map ip 10.0.0.2 x121-address 20 broadcast
[RouterA-Serial2/0] ip address 10.0.0.1 8
[RouterA-Serial2/0] quit
# Configure the dynamic routing protocol RIP.
[RouterA] rip
[RouterA-rip-1] network 10.0.0.0
[RouterA-rip-1] network 20.0.0.0
[RouterA-rip-1] import-route direct
[RouterA-rip-1] quit
# Configure to make the priority of routes on dialup interfaces lower than that of
serial interfaces.
[RouterA] interface bri 3/0
[RouterA-Bri3/0] rip metricin 2
2 Configure Router B
# Configure a dialer rule and configure a local user database.
<RouterB> system-view
[RouterB] dialer-rule 1 ip permit
[RouterB] local-user usera
[RouterB-luser-usera] password simple usera
[RouterB-luser-usera] service-type ppp
[RouterB-luser-usera] quit
# Configure the shared DCC on Dialer 0.
[RouterB] interface dialer 0
[RouterB-Dialer0] link-protocol ppp