[Smitty]

I'm having the same issue with my Dell XPS 12 (Core I7-3537U, 8GB, Win8.1-Pro-64bit), Dell D3000 dock (DisplayLink), and Hyper-V virtual switch. The "Dell Gigabit Ethernet" device driver is listed as DisplayLink Corp. version 7.5.54496.0 dated 3/21/2014. The "Hyper-V Virtual Ethernet Adapter" device driver is listed as Microsoft version 6.3.9600.16384 dated 6/21/2006.

My Dell Gigabit connection changes to Enabled, and my Hyper-V connection goes to "Identifying" as soon as I setup the Hyper-V virtual switch, but it never changes to the domain name. Network connectivity to our domain is lost from then on - I don't even need to launch a Hyper-V virtual machine.

If I connect to our domain through a Cisco USB to Ethernet dongle (ASIX AX88772) attached directly to the Dell XPS12, it works just fine - the Cisco connection is listed as Enabled and the Hyper-V connection is listed with the domain name connection.