223
[RouterB-Serial2/1/0] ip address 10.0.0.2 8
# Enable PPP encapsulation on the interface.
[RouterB-Serial2/1/0] link-protocol ppp
[RouterB-Serial2/1/0] quit
# Configure an IP address for interface Loopback 1.
[RouterB] interface loopback 1
[RouterB-Loopback1] ip address 40.0.0.1 32
[RouterB-Loopback1] quit
# Configure OSPF.
[RouterB] ospf
[RouterB-ospf-1] area 0
[RouterB-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255
[RouterB-ospf-1-area-0.0.0.0] network 20.0.0.0 0.255.255.255
[RouterB-ospf-1-area-0.0.0.0] network 40.0.0.0 0.0.0.0
[RouterB-ospf-1-area-0.0.0.0] quit
[RouterB-ospf-1] import-route direct
Dynamic route backup for bundle DDR configuration example
Network requirements
As shown in Figure 69, Router A and Router B are directly connected through their serial interfaces. They
are also connected to the ISDN through their ISDN BRI interfaces. The telephone number of Router B is
8810010. The telephone number of Router B is 8810052.
Enable dynamic route backup on Router A to monitor network segment 30.0.0.0/8 connected to Router
B.
Figure 69 Network diagram
Configuration procedure
1. Configure Router A:
# Create dialer group 1 and configure a dial rule for it.
<RouterA> system-view
[RouterA] dialer-group 1 rule ip permit
Create a local user userb for Router B, and configure the service type as PPP.
[RouterA] local-user userb class network
[RouterA-luser-network-userb] password simple userb