Configuration example for router-to-router ISDN caller identification callback with DCC

As shown in Figure 53:

• Router A and Router B are interconnected through ISDN BRI interfaces across an ISDN network.

• Interface BRI 1/0 on Router A is assigned the IP address of 100.1.1.1/24 and interface BRI 1/0 on Router B is assigned the IP address of 100.1.1.2/24.

Configure ISDN caller identification callback with C-DCC between Router A and Router B, specifying Router A as the callback client and Router B as the callback server.

1. Configure Router A:

   # Configure a dial access control rule for dialer access group 1.

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

   # Assign an IP address to interface BRI 1/0, and configure C-DCC parameters and the dial string for placing calls to Router B.

   [RouterA] interface bri 1/0
   [RouterA-Bri1/0] ip address 100.1.1.1 255.255.255.0
   [RouterA-Bri1/0] dialer enable-circular
   [RouterA-Bri1/0] dialer-group 1
   [RouterA-Bri1/0] dialer route ip 100.1.1.2 8810052
   [RouterA-Bri1/0] dialer timer enable 15
   

2. Configure Router B:

   # Configure a dial access control rule for dialer access group 2.

   <RouterB> system-view
   [RouterB] dialer-rule 2 ip permit
   

   # Assign an IP address to interface BRI 1/0, and configure C-DCC parameters and the dial string for placing calls to Router A.

   [RouterB] interface bri 1/0
   [RouterB-Bri1/0] ip address 100.1.1.2 255.255.255.0
   [RouterB-Bri1/0] dialer enable-circular
   [RouterB-Bri1/0] dialer-group 2
   [RouterB-Bri1/0] dialer route ip 100.1.1.1 8810048
   

   # Enable the local end to place return calls for ISDN calling number 8810048.

   [RouterB-Bri1/0] dialer call-in 8810048 callback