DosTips.com

Posted: **13 Oct 2023 02:17**

hello guys,

so netsh interface show interface gives me this:

Admin State    State          Type             Interface Name
-------------------------------------------------------------------------
Enabled        Disconnected   Dedicated        Wi-Fi
Enabled        Connected      Dedicated        Ethernet 2
Enabled        Disconnected   Dedicated        Ethernet

and I am looking for a way to store the Interface Name which has state connected (in this example it wold be "Ethernet 2" as variable,
so later on I can do soemthing like this:

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@NETSH interface set interface "Ethernet 2" DISABLED
@NETSH interface set interface "Ethernet 2" ENABLED

but instead hardcoded interface name, i would like to use the one from variable set above...

how can I do that?

Posted: **14 Oct 2023 05:11**

test-1.bat

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@echo off
for /f "tokens=3*" %%a in ('netsh interface show interface ^| findstr "Connected"') do (
    set "AdapterName=%%b"
)
echo,%AdapterName%
pause

Posted: **02 Apr 2024 01:11**

Hello,

can I kindly ask for one more modification?

So from this, basicaly I see in my interfaces:

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Admin State    State          Type             Interface Name
-------------------------------------------------------------------------
Enabled        Disconnected   Dedicated        Wi-Fi
Enabled        Connected      Dedicated        Ethernet 2
Enabled        Connected      Dedicated        VMware Network Adapter VMnet1
Enabled        Connected      Dedicated        VMware Network Adapter VMnet8
Enabled        Disconnected   Dedicated        Ethernet

and while it loops it sets the Ethernet 2, then it replaces vy VMnet1, and after all it replaces by VMnet8 as it looks for ANY "CONNECTED" state...
however, I am realy looking for any "Ethernet" network only...

so can I kindly ask to modify the code bellow to only look for Ethernet* networks only?

Thank you

Posted: **02 Apr 2024 08:10**

Pipe a second findstr for "Ethernet"

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@echo off
for /f "tokens=3*" %%a in ('netsh interface show interface ^| findstr "Connected" ^| findstr "Ethernet"') do (
    set "AdapterName=%%b"
)
echo %AdapterName%

Posted: **14 May 2024 23:26**

hello,

sorry but does not work... I tried to figure out myself for long time, but I cant

so my:

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netsh interface show interface

returns:

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Admin State    State          Type             Interface Name
-------------------------------------------------------------------------
Enabled        Connected      Dedicated        Wi-Fi
Disabled       Disconnected   Dedicated        Ethernet 2
Enabled        Connected      Dedicated        VMware Network Adapter VMnet1
Enabled        Connected      Dedicated        VMware Network Adapter VMnet8
Enabled        Disconnected   Dedicated        Ethernet

and when I run my test.bat:

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:: set currently connected ethernet as variable
FOR /f "tokens=3*" %%a IN ('netsh interface show interface ^| findstr "Connected" ^| findstr "Ethernet"') DO (SET "AdapterName=%%b")

:: disconnect LAN if connected
IF "%AdapterName:~0,8%"=="Ethernet" (NETSH interface set interface "%AdapterName%" DISABLED)
ECHO LAN disconnected, AdapterName set as %AdapterName%

it only closes the CMD window with error:

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c:\temp\World of Warcraft 5.4.8>test

c:\temp>test.bat
c:\temp>FOR /F "tokens=3*" %a IN ('netsh interface show interface | findstr "Connected" | findstr "Ethernet"') DO (SET "AdapterName=%b" )
DISABLED) was unexpected at this time.
c:\temp>IF "~0,8AdapterName" DISABLED)

can I kindly ask for help here?

Posted: **15 May 2024 08:28**

Based on your initial netsh output you do not have any interfaces that are "Connected" and are "Ethernet" What output are expecting when nothing matches?

Posted: **15 May 2024 11:38**

As Squashman wrote you don't have a match so variable AdapterName remains undefined. Looks like it does not work if variable AdapterName is not defined at all. Looks like IF fails if variable is not defined.
Add

Code: Select all

set AdapterName=doesnotexist

to the beginning of the code.

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set AdapterName=doesnotexist
:: set currently connected ethernet as variable
FOR /f "tokens=3*" %%a IN ('netsh interface show interface ^| findstr "Connected" ^| findstr "Ethernet"') DO (SET "AdapterName=%%b")

:: disconnect LAN if connected
IF "%AdapterName:~0,8%"=="Ethernet" (
	NETSH interface set interface "%AdapterName%" DISABLED
REM should ERRORLEVEL be checked?
	ECHO LAN disconnected, AdapterName set as %AdapterName%
)

Saso

Posted: **15 May 2024 23:08**

Hello,

thank you for the input, actually it worked, however I assume as a workaround,
because basicaly there are only two possible scenarios,

this is my netsh interface show interface before running the script:

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Admin State    State          Type             Interface Name
-------------------------------------------------------------------------
Enabled        Disconnected   Dedicated        Wi-Fi
Enabled        Connected      Dedicated        Ethernet 2
Enabled        Connected      Dedicated        VMware Network Adapter VMnet1
Enabled        Connected      Dedicated        VMware Network Adapter VMnet8
Enabled        Disconnected   Dedicated        Ethernet

so basicaly i always want to skip the VMware,
and form here, always either one of Ethernets will be connected (not both), or none of them but Wi-Fi will.
However, its possible that both Wi-Fi and one of the Ethernet will be connected... in this case I wish to prefer to store as variable the connected Ethernet as priority.

I know I have already asked a lot... but can I kindly ask to modify one last time according to this explanation?

Summary:
- skip VMWare(s)
- if both Wi-Fi and one of Ethernet(s) are connected, prefer the Ethernet
- in theory there could be only one of each (wifi or ethernet), or more of each too
- if none is connected (which is weird), i would keep what you just did and at the beginning of script I would manualy do: "SET "AdapterName=Wi-Fi""

Thank you guys, you are real life savers

Posted: **16 May 2024 09:58**

Try this:

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@echo off
set "AdapterName=Wi-Fi"
:: set currently connected ethernet as variable
FOR /f "tokens=3*" %%a IN ('netsh interface show interface ^| findstr /v "VMware" ^| sort /r /+48 ^| findstr "Connected" ^| findstr "Ethernet"') DO (SET "AdapterName=%%b")
:: disconnect LAN if connected
IF "%AdapterName:~0,8%"=="Ethernet" (
	NETSH interface set interface "%AdapterName%" DISABLED
REM should ERRORLEVEL be checked?
	ECHO LAN disconnected, AdapterName set as %AdapterName%
)

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findstr /v

removes VMware strings from the output

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sort /r /+48

sorts the output in reverse order (so the Wifi interface is at the top) and sort is based on column 48. Why? Because for /f will set variable AdapterName for each line that contains word 'Connected'. So in this case word 'Ethernet' will be at the bottom of the sort operation and variable will have that value.

Note: searches (findstr) are case sensitive.

Saso

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