PPP IP address negotiation configuration example
Network requirements
As shown in Figure 7, configure Router A to allocate an IP address for Serial 2/0 of Router B through PPP negotiation.
Figure 7: Network diagram
![](images/image5.png)
Configuration procedure
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
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
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.