One
Second, IP planning
1) Configure the terminal IP address, subnet mask, gateway.
laptop0:192.168.0.100 255.255.255.0 192.168.0.1
pc0:172.16.0.100 255.255.0.0 172.16.0.1
2) Configure the IP address of the routing port.
Router1-fa0/0:ip Address 123.0.0.2 255.0.0.0
Router1-fa0/1:ip Address 130.0.0.2 255.255.0.0
Router0-fa0/1:ip address 192.168.0.1 255.255.255.0
Router0-fa0/0:ip Address 123.0.0.1 255.0.0.0
Router2-fa0/1:ip Address 172.16.0.1 255.255.0.0
Router2-fa0/0:ip Address 130.0.0.1 255.255.0.0
Third, the Operation procedure
Router0:ip Route 130.0.0.1 255.255.0.0 123.0.0.2
Router0:ip Route 172.16.0.1 255.255.0.0 123.0.0.2
Router2:ip Route 123.0.0.1 255.0.0.0 130.0.0.2
Router2:ip Route 172.16.0.1 255.255.0.0 130.0.0.2
Router1:ip Route 192.168.0.1 255.255.255.0 123.0.0.1
Router1:ip Route 172.16.0.1 255.255.0.0 130.0.0.1
Terminals communicate with each other through three routers (static routing settings)