Hi,
I had hyper-v 2012 r2 network adapter shared with system so hyper-v created additional virtual NIC with speed 10Gb/s and the same NIC speeds had guest OS (also windows 2012 R2). Now I changed setting on virtual switch and disabled "sharing this interface with system" to have dedicated physical NIC for hyper-v, so system removed this virtual 10Gb/s NIC. But after that all my quest OS still have network adapters with 10Gb/s not 1Gb/s (like dedicated physical interface) on host computer, and additionally I lost ability to RDP to any hyper-v guest computers. When I ping quest computer in two way it is working ok, firewall is disabled on guest computers but I cannot RDP to them :(
Something went wrong when I disabled sharing NIC on virtual switch.