3Com 3C13636 Configuration Manual page 1470

3Com Router 3000 Ethernet Family
Configuration Guide
# Configure a dialer ACL.
[3Com] dialer-rule 1 ip permit
# Configure dial parameters on the BRI 0/0/0 interface.
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] ip address 20.0.0.1 255.0.0.0
[3Com-Bri0/0/0] dialer enable-circular
[3Com-Bri0/0/0] dialer-group 1
[3Com-Bri0/0/0] dialer route ip 20.0.0.2 8810052
[3Com-Bri0/0/0] dialer route ip 30.0.0.1 8810052
# Configure Serial 1/0/0 and encapsulate it with X.25.
[3Com-Bri0/0/0] interface serial 1/0/0
[3Com-Serial1/0/0] link-protocol x25 dte ietf
[3Com-Serial1/0/0] x25 x121-address 10
[3Com-Serial1/0/0] x25 map ip 10.0.0.2 x121-address 20 broadcast
[3Com-Serial1/0/0] ip address 10.0.0.1 255.0.0.0
[3Com-Serial1/0/0] quit
# Enable RIP.
[3Com] rip
[3Com-rip] network 10.0.0.0
[3Com-rip] network 20.0.0.0
[3Com-rip] quit
# Configure a dynamic routing standby group.
[3Com] standby routing-rule 1 ip 30.0.0.1 255.0.0.0
# Assign the route on the dial interface with a priority lower than that of serial interface.
[3Com] interface bri 0/0/0
[3Com-Bri0/0/0] rip metricin 2
# Apply the dynamic routing standby group on the dial interface.
[3Com-Bri0/0/0] standby routing-group 1
2) Configure Router B
# Enable X.25 switching.
[3Com] x25 switching
# Encapsulate the interfaces with X.25.
[3Com] interface serial 0/0/0
[3Com-Serial0/0/0] link-protocol x25 dce ietf
[3Com-Serial0/0/0] interface serial 1/0/0
[3Com-Serial1/0/0] link-protocol x25 dce ietf
# Configure X25 switching information.
[3Com] x25 switch svc 20 interface Serial 0/0/0
3Com Corporation
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Chapter 2 Dynamic Routing Standby