1、新建拓扑图。
4、配置router1的ip地址：configure terminalinterface gigabitEthernet 0/1ip address 10.1.2.1 255.255.255.0no shutdownexitinterface gigabitEthernet 0/0ip address 10.1.1.2 255.255.255.0no shutdownexitinterface gigabitEthernet 0/2ip address 192.168.20.1 255.255.255.0no shutdownexitdo show ip interface brief
7、在pc0上进行验证：ping 192.168.20.2ping 192.168.30.2
