3Com MSR 50 Series Configuration Manual page 521

Network diagram
Figure 147 Network diagram for dynamic route backup configuration
Router A
S2 /1:15
2.0.0.1/8
S2/0
1.0.0 .1/8
DLCI:100
n
This network diagram just illustrates a simple implementation. In real practice, the
monitored network segments may be distributed on multiple devices.
Configuration procedure
1 Configure Router A
# Configure a dialer rule.
<RouterA> system-view
[RouterA] dialer-rule 1 ip permit
# Create a dynamic route backup group to monitor three network segments.
[RouterA] standby routing-rule 1 ip 10.0.0.0 255.0.0.0
[RouterA] standby routing-rule 1 ip 11.0.0.0 255.0.0.0
[RouterA] standby routing-rule 1 ip 12.0.0.0 255.0.0.0
# Bind the CE1 interface into a pri-set.
[RouterA] controller E1 2/1
[RouterA-E1 2/1] pri-set
[RouterA-E1 2/1] quit
# Configure Serial 2/0 as a FR interface.
[RouterA] interface serial 2/0
[RouterA-Serial2/0] ip address 1.0.0.1 255.0.0.0
[RouterA-Serial2/0] link-protocol fr
[RouterA-Serial2/0] fr interface-type dte
[RouterA-Serial2/0] fr inarp
[RouterA-Serial2/0] fr map ip 1.0.0.2 100
[RouterA-Serial2/0] quit
# Configure DCC polling on the PRI interface Serial 2/1:15.
[RouterA] interface serial 2/1:15
[RouterA-Serial2/1:15] ip address 2.0.0.1 255.0.0.0
[RouterA-Serial2/1:15] dialer enable-circular
Dynamic Route Backup Configuration Example
S 2/1 :15
2 .0.0.2/8
ISDN PRI line
FR
Eth1/0
10 .0 .0.1/8
Router B
Eth1/1
11 .0 .0.1/8
Eth1/2
S 2/0
12 .0 .0.1/8
1.0.0.2/8
DLCI:200
521