I have the same problem (Windows 7 - up to date and Parallels Version 11.1.1 running the latest build (32312) on OS X 10.11.2) and it is really annoying. I use USB to connect my Ethernet to the VM and every time I start the VM I have to unplug and plug the USB.Hi Guenter, thank you for reporting us the issue, this seems to be known issue in the latest build of Parallels Desktop 11 for Mac and our Engineers are looking into this. And this should be fixed in our future updates. Stay tuned for the update, http://kb.parallels.com/123410
When will this get fixed? This is really poor implementation by Parallels and if it carries on it will encourage me to switch to VMware.