[R1]ip route-static 0.0.0.0 0.0.0.0 192.168.2.2
[R3]ip route-static 0.0.0.0 0.0.0.0 192.168.3.1
[R2]ip route-static 192.168.1.0 255.255.255.0 192.168.2.1
[R2]ip route-static 192.168.4.0 255.255.255.0 192.168.3.2
pc1和pc2之间能够相互连通
原文:https://blog.51cto.com/14309999/2388251