> This is running the latest version with all the current patches. However, each > time when I create a VM instance; the network doesn't work or work properly. > If I use the default NIC, it doesn't work at all; but the legacy NIC is > recognized as de0. However, it gets stuck after fetching the first > file...really just hangs. > Has anyone successfully been able to run OpenBSD in Hyper-V/Windows 2012? Also > been able to keep a working network connection?
I also had problems with bsd.rd (the RAM disk installer), but try with the CD installer. The networking works with the normal kernel. We have some other notes on Hyper-V http://sr.wiki.halon.se/wiki/Supported_hardware#Microsoft_Hyper-V that you might find interesting.

