Hyper-V Network Virtualization (HNV): updates and hotfixes

This article documents recommended hotfixes, product updates, and known solutions that are currently available for Windows Server 2012 and Windows Server 2012 R2 Hyper-V Network Virtualization (HNV) environments.

MS is keeping this KB up-to-date. Must be added to bookmarks.

https://support.microsoft.com/en-us/kb/2974503