Disable Local Area Connection

[_pi]

for me working code would be helpful too. i very use remote desktop from my old notebook to my fast workstation.
but sometimes after notebook reboot the connection is slow, so after a lot of testing my current solution is to have
a desktop icon linking to the connection where i right click and disconnect. then i wait until the connection tray icon changes to disconnected
and then again right click and enable connection.

but in the end of the day it would be clever to find the primary problem what is causing the problem.
i think it has something to to with using automatic dns settings.