dhcp:
netsh interface ip set address "本地连接 4" dhcp
ipconfig /release "本地连接 4"
static ip:
rem netsh interface ip set address "本地连接 4" static 192.168.0.4 255.255.255.0 192.168.1.1 1
REM netsh interface ip set address "本地连接 4" static 192.168.2.4 255.255.255.0 none
netsh interface ip set address "本地连接 4" static 192.168.2.4 255.255.255.0 none
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switch between dhcp and static ip in windows
原文：http://blog.csdn.net/llrraa2010/article/details/20863123