Thomas, many thanks for this hint!
I did not know that hyper-v has a legacy network. I just installed it and put some windows server on it.
I installed a ACC and a ASG on the Hyper-v (Windows 2008 Std R1). The NIC is a DEC interface and it looks like it is running. But I only did the inital setup without any configuration (After the installation and the reboot I finished). I hope, that I can test this configuration in the next week(s).
So I found a solution for my new home network
Regards
Marco
Edit: I tried the Beta of 7.5 (but this is going to stable in a few days).