NI-enabled ISDN BRI configuration example

As shown in Figure 39, configure an NI-enabled ISDN BRI line between Router A and Router B for data transmission.

In this example, the ISDN BRI interfaces on Router A and Router B are operating on the user side (the default). You must configure the ISDN PRI interfaces as the network side on the service provider switches connected to the routers.

1. Configure Router A:

   # Configure dialer-group 1 to allow any IP packets to trigger a call setup.

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

   # Assign interface BRI 2/4/0 an IP address.

   [RouterA] interface bri 2/4/0
   [RouterA-Bri2/4/0] ip address 202.38.154.1 255.255.0.0
   

   # Enable C-DDR on the interface, configure the route to Router B, and assign the interface to dialer-group 1.

   [RouterA-Bri2/4/0] dialer circular enable
   [RouterA-Bri2/4/0] dialer route ip 202.38.154.2 8810154
   [RouterA-Bri2/4/0] dialer-group 1
   

   # Set the switch type to NI on the BRI interface.

   [RouterA-Bri2/4/0] isdn protocol-type ni
   

   # Assign SPID 54321 to the B1 channel and SPID 65432 to the B2 channel.

   [RouterA-Bri2/4/0] isdn spid1 54321
   [RouterA-Bri2/4/0] isdn spid2 65432
   

   # Set the maximum number of INFORMATION retransmissions to 2.

   [RouterA-Bri2/4/0] isdn spid resend 2
   

2. Configure Router B:

   # Configure dialer-group 1 to allow any IP packets to trigger a call setup.

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

   # Assign interface BRI 2/4/0 an IP address.

   [RouterB] interface bri 2/4/0
   [RouterB-Bri2/4/0] ip address 202.38.154.2 255.255.0.0
   

   # Enable C-DDR on the interface, configure the route to Router A, and assign the interface to dialer-group 1.

   [RouterB-Bri2/4/0] dialer circular enable
   [RouterB-Bri2/4/0] dialer route ip 202.38.154.1 8810152
   [RouterB-Bri2/4/0] dialer-group 1
   

   # Set the switch type to NI on the BRI interface.

   [RouterB-Bri2/4/0] isdn protocol-type ni
   

   # Assign SPID 12345 to the B1 channel and SPID 23456 to the B2 channel.

   [RouterB-Bri2/4/0] isdn spid1 12345
   [RouterB-Bri2/4/0] isdn spid2 23456
   

   # Set the maximum number of INFORMATION retransmissions to 2.

   [RouterB-Bri2/4/0] isdn spid resend 2
   

3. Verify the configuration:

   # Ping 202.38.154.2 from Router A to verify that the state of a B-channel on BRI 2/4/0 changes to Line up.

   # Ping 202.38.154.2 again to verify that the ISDN BRI line transfers data without any losses.