@echo off
setlocal EnableDelayedExpansion
:top
ping -n 1 www.baidu.com | find /I "TTL" && goto top
echo  网络不通
goto top
复制代码

@echo off
setlocal EnableDelayedExpansion
set count=0
:top
ping -n 1 www.baidu.com | find /I "TTL" || (
    set /a count+=1
    echo !count!     网络不通
) 
ping -n 1 www.baidu.com | find /I "TTL" && (
    cls
)
goto top
复制代码

@echo off
setlocal EnableDelayedExpansion
set count=0
:top
ping -n 1 www.baidu.com | find /I "TTL" || (
    set /a count+=1
    echo !count!     网络不通
)
ping -n 3 127.0.0.1 > nul
goto top
复制代码

@Echo Off
rem http://www.bathome.net/redirect.php?goto=findpost&ptid=1246&pid=164208
SetLocal EnableDelayedExpansion
:loop
(For /F "delims=" %%i In ('ping -n 1 www.baidu.com ^| find /I "TTL"') Do (
	set /a n+=10001
	Set L1=%%i                                   
	Echo !L1:~0,45! [ !n:~-4! ]
)) || (
	set /a n+=10001
	set str=网络不通                                                            
	echo !str:~0,50! [ !n:~-4! ]
)
timeout 1 >nul
goto :loop
复制代码

<# :
@echo off
powershell -NoProfile -ExecutionPolicy bypass "Get-Content -literal '%~f0' |Out-String|Invoke-Expression"
pause
#>
$n=1
while($true){
	$result=ping -n 1 www.baidu.com
	if($result.Length -eq 40){"网络不通"}
	else{$result|?{$_.contains("TTL")}|%{$_+" "+$n;$n=$n+1;sleep 1}
	}
}
复制代码

@echo off
setlocal enabledelayedexpansion
::设置尝试次数
set "imax=5"
:top
set/a "i+=1, k=0"
for /f "delims=" %%v in ('ping -n 1 www.baidu.com ^|find /i "TTL" ') do (
	set "k=1" &(echo,%%v !i!)
)
if !k! equ 0 (echo,!i!  网络不通)
if !i! geq !imax! (endlocal&exit/b)
goto top
复制代码

@echo off

setlocal enabledelayedexpansion

::设置尝试次数

set "imax=500"

:top

set/a "i+=1, k=0"

for /f "delims=" %%v in ('ping -n 1 www.baidu.com ^|find /i "TTL" ') do (

	set "k=1" &(echo,%%v !i!)

)

if !k! equ 0 (echo,!i!  网络不通)

if !i! geq !imax! (endlocal&exit/b)

goto top
复制代码