PPP IP address negotiation configuration example

As shown in Figure 7, configure Router A to allocate an IP address for Serial 2/0 of Router B through PPP negotiation.

1. Configure Router A:

   # Configure a local IP address pool.

   <RouterA> system-view
   [RouterA] ip pool 1 200.1.1.10 200.1.1.20
   

   # Configure the IP address of Serial 2/0.

   [RouterA] interface serial 2/0
   [RouterA-Serial2/0] ip address 200.1.1.1 16
   

   # Allocate an IP address to the remote port (Serial 2/0 of Router B) from the IP address pool.

   [RouterA-Serial2/0] remote address pool 1
   

2. Configure Router B:

   # Enable IP address negotiation on Serial 2/0.

   <RouterB> system-view
   [RouterB] interface serial 2/0
   [RouterB-Serial2/0] ip address ppp-negotiate
   

3. Verify the configuration:

   # After the configuration is complete, display summary information about Serial 2/0 on Router B.

   [RouterB-Serial2/0] display interface serial 2/0 brief
   The brief information of interface(s) under route mode:
   Link: ADM - administratively down; Stby - standby
   Protocol: (s) - spoofing
   Interface            Link Protocol Main IP         Description
   S2/0                 UP   UP       200.1.1.10
   

   The output shows Serial 2/0 obtains IP address 200.1.1.10 through PPP negotiation.

   # Ping Serial 2/0 of Router A from Router B.

   [RouterB-Serial2/0] ping 200.1.1.1
     PING 200.1.1.1: 56  data bytes, press CTRL_C to break
       Reply from 200.1.1.1: bytes=56 Sequence=1 ttl=255 time=1 ms
       Reply from 200.1.1.1: bytes=56 Sequence=2 ttl=255 time=4 ms
       Reply from 200.1.1.1: bytes=56 Sequence=3 ttl=255 time=4 ms
       Reply from 200.1.1.1: bytes=56 Sequence=4 ttl=255 time=10 ms
       Reply from 200.1.1.1: bytes=56 Sequence=5 ttl=255 time=4 ms
   
     --- 200.1.1.1 ping statistics ---
       5 packet(s) transmitted
       5 packet(s) received
       0.00% packet loss
       round-trip min/avg/max = 1/4/10 ms
   

   The output shows Serial 2/0 of Router A can be pinged.