IP及DNS设置（Netsh）

#根据连接状态查找使用中网卡
gwmi win32_networkadapter -filter "NetConnectionStatus = 2"
#根据是否配置网关查找使用中网卡
$index = (gwmi Win32_NetworkAdapterConfiguration |?{ $_.DefaultIPGateway -ne $null}).Index
$ConnectionID = (gwmi win32_networkadapter -filter "index = $index").NetConnectionID
$ConnectionID

#查找loopback网卡
$index_lb = (gwmi Win32_NetworkAdapterConfiguration | ? {$_.Description -eq "Microsoft Loopback Adapter"}).index

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#禁用/启用网卡

netsh.exe interface set interface "$ConnectionID" disabled
netsh.exe interface set interface "$ConnectionID" enabled

设置静态IP及DNS：

netsh interface ip set address "Wi-Fi" source=static addr=192.168.1.234 mask=255.255.255.0 gateway=192.168.1.2
netsh interface ip set dnsservers "Wi-Fi" static 8.8.8.8 primary validate=no    设置第一个DNS地址

添加多个DNS：

netsh interface ip add dnsservers "Wi-Fi" 202.106.0.20 index=2 validate=no   添加第二个DNS地址（注：如果index=1，则变为第一个DNS地址，原第一个下移）

netsh interface ip add dnsservers "Wi-Fi" 202.106.0.21 index=3 validate=no    添加第三个DNS地址

设置动态IP：

netsh interface ip set address "Wi-Fi" source=dhcp
netsh interface ip set dnsservers "Wi-Fi" source=dhcp

Windows Server 2003:

netsh interface ip set dns "本地连接 4" static 100.40.2.53 primary
netsh interface ip add dns "本地连接 4" 100.40.2.54 index=2
netsh interface ip add dns "本地连接 4" 219.232.48.61 index=5
netsh interface ip add dns "本地连接 4" 202.106.196.115 index=6
ipconfig /all