@echo off
for /l %%a in (100,1,120) do (
ping 10.3.3.%%a -w 1 -n 1|find /i "Lost = 1"&&set c=1||set c=0
if !c!==0 (
set ip=%%a
goto :changeip
)
)
exit

:changeip
rem 下面两个for是为了提取出你的网卡名称.
for /f "tokens=2,* delims=: " %%p in ('ipconfig^|find "Ethernet adapter"') do (
for /f "tokens=1 delims=:" %%i in ("%%q") do (
set lanname=%%i
)
)
rem 这里是开始改IP。DNS你也没说所以我用我自己的做了.
netsh interface IP Set Address "%lanname%" Static 10.3.3.%ip% 255.255.255.0 10.3.3.254 1
rem 下面这句是改主DNS,DNS按照你自己的修改.
netsh interface ip set dns name="%lanname%" source=staticaddr=10.3.3.10
rem 下面这句是改副DNS,不需要的话就把下面这句删掉就行.
netsh interface ip add dns "%lanname%" 10.3.3.11 index=2
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for /f "tokens=2 delims=:" %%a in ('ipconfig ^| find/i "ip address"')do for /f "tokens=4 delims=." %%b in ("%%a") do netsh interface ip set address name="本地连接" source=static addr=10.3.3.%%b mask=255.255.255.0 
netsh interface ip set address name="本地连接" gateway=10.3.3.254 gwmetric=1
netsh interface ip set dns "本地连接" source=static addr = 10.3.3.10
netsh interface ip add dns "本地连接" addr= 10.3.3.11
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@ echo off 
    SetLocal EnableDelayedExpansion
    set Str=0123456789
    for /l %%L in (1 1 2) do (
    set /a n = !random! %% 10
    for %%n in (!n!) do set Out=!Out!!Str:~%%n,1!
)
　　set Nic=本地连接 
　　rem //可以根据你的需要更改, 
　　set Addr=10.3.3.!Out! 
　　set Mask=255.255.255.0
　　set Gway=10.3.3.254 
　　set Dns1=10.3.3.10
　　set Dns2=10.3.3.11
　　rem //以上依次为IP地址、子网掩码、网关、首选DNS、备用DNS 
　　echo ------------------------------------------------------ 
　　echo 正在对 [%nic%] 进行IP设置，请稍等 
    rem //可以根据你的需要更改 
　　echo. IP地址 = %Addr% 
　　echo. 子网掩码 = %Mask% 
　　netsh interface ip set address name=%Nic% source=static addr=%Addr% mask=%Mask% >nul 
　　echo. 网关 = %Gway% 
　　netsh interface ip set address name=%Nic% gateway=%Gway% gwmetric=1 >nul 
　　echo. 首选DNS = %Dns1% 
　　netsh interface ip set dns name=%Nic% source=static addr=%Dns1% register=PRIMARY >nul 
　　echo. 备用DNS = %Dns2% 
　　netsh interface ip add dns name=%Nic% addr=%Dns2% index=2 >nul 
      echo ------------------------------------------------------
　　echo 设置完毕！
    echo
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for /l %%a in (100,1,200) do (ping -n 1 10.3.3.%%a | find "Request timed out" && echo 10.3.3.%%a >>f:\ip不通.txt)
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