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[RouterB-ospf-1-area-0.0.0.0] import-route direct
Dynamic route backup configuration example 3
Network requirements
As shown in Figure 60:
• Router A and Router B are connected through an X.25 network.
• Router A and Router B are connected to the same ISDN switched network through their ISDN
BRI interfaces, each of which has two B channels bound in it. Router A and Router B can call
each other through a resource-shared DCC (RS-DCC). The telephone number of Router A is
8810010, and that of Router B is 8810052.
Use Router A as the master device of a dynamic route backup group to monitor network segment
30.0.0.0/8, which is connected to Router B.
The X.25 link functions as the primary link between Router A and Router B. When the route to
network segment 30.0.0.0/8 becomes invalid (for example, when the X.25 network fails), Router A
automatically establishes an ISDN BRI link to router B.
Figure 60 Network diagram
Configuration procedure
1. Configure Router A:
# Create a dialer access group rule and a local user database.
<RouterA> system-view
[RouterA] dialer-rule 1 ip permit
[RouterA] local-user userb
[RouterA-luser-userb] password simple userb
[RouterA-luser-userb] service-type ppp
[RouterA-luser-userb] quit
# Create a dynamic route backup group.
[RouterA] standby routing-rule 1 ip 30.0.0.1 32
# Configure an RS-DCC on Dialer0.
[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
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