I am using the latest Docker Desktop for Windows in my Win10 Pro. I have been using it with a Native Windows container and a custom Ubuntu (HyperV). I created an External Switch, and this switch is used by both.
I switched to Linux Container and I added the External Switch to the builtin DockerDesktopVM (HyperV). I ran docker swarm init and I got the DockerDesktopVM (HyperV) IP. I tried to ping it from windows and it failed to reply 
I tried from my Ubuntu (HyperV) and same issue.
Is it possible to add an additional Switch, in this case an External Switch to DockerDesktopVM(HyperV)? I have zero visibility on this VM so is hard to know what is actually happen inside
Thanks for you help 