Dynamic route backup configuration example 2

As shown in Figure 59:

• Router A and Router B are directly connected through their serial interfaces. They are also connected to the same ISDN switched network through their ISDN BRI interfaces, allowing them to call each other. The telephone number of Router B is 8810052.

• The serial interfaces of the two routers are in network segment 10.0.0.0/8, and their BRI interfaces are in network segment 20.0.0.0/8.

Use Router A as the master device of a dynamic route backup group to monitor network segment 40.0.0.0/8, which is connected to Router B.

1. Configure Router A:

   # Create a dialer access group rule.

   <RouterA> system-view
   [RouterA] dialer-rule 1 ip permit
   

   # Configure dialup parameters for interface BRI 3/0.

   [RouterA] interface bri 3/0
   [RouterA-Bri3/0] ip address 20.0.0.1 8
   [RouterA-Bri3/0] dialer enable-circular
   [RouterA-Bri3/0] dialer-group 1
   [RouterA-Bri3/0] dialer route ip 40.0.0.1 8810052
   [RouterA-Bri3/0] quit
   

   # Configure interface Serial 2/0.

   [RouterA] interface serial 2/0
   [RouterA-Serial2/0] ip address 10.0.0.1 8
   [RouterA-Serial2/0] quit
   

   # Configure OSPF.

   [RouterA] ospf
   [RouterA-ospf-1] area 0
   [RouterA-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255
   [RouterA-ospf-1-area-0.0.0.0] network 20.0.0.0 0.255.255.255
   [RouterA-ospf-1-area-0.0.0.0] import-route direct
   [RouterA-ospf-1-area-0.0.0.0] quit
   [RouterA-ospf-1] quit
   

   # Create a dynamic route backup group.

   [RouterA] standby routing-rule 1 ip 40.0.0.1 32
   

   # Configure the routes used by the serial interface to adopt higher priorities than those used by the dialup interface.

   [RouterA] interface bri3/0
   [RouterA-Bri3/0] ospf cost 2000
   [RouterA-Bri3/0] ospf network-type broadcast
   

   # Enable the dynamic route backup function.

   [RouterA-Bri3/0] standby routing-group 1
   

2. Configure Router B:

   # Create a dialer access group rule.

   <RouterB> system-view
   [RouterB] dialer-rule 1 ip permit
   

   # Configure dialup parameters for interface BRI 3/0.

   [RouterB] interface bri 3/0
   [RouterB-Bri3/0] ip address 20.0.0.2 8
   [RouterB-Bri3/0] dialer enable-circular 
   [RouterB-Bri3/0] dialer-group 1
   [RouterB-Bri3/0] quit
   

   # Configure Serial 2/0.

   [RouterB] interface serial 2/0
   [RouterB-Serial2/0] ip address 10.0.0.2 8
   [RouterB-Serial2/0] quit
   

   # Configure 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] import-route direct