I was recently given a pointer to the following document:

Windows Server 2012 NIC Teaming (LBFO) Deployment and Management

It is a very comprehensive guide to setting up network teaming in Windows Server 2012, and discusses many of the common questions that I hear about network teaming (it also discusses network teaming an Hyper-V at length). If you are using (or are planning to use) Hyper-V on Windows Server 2012 in a production environment – you really should read this document, so you understand all the options that are now available to you for network redundancy and performance.

--> Please see the rest on Ben's Blog : http://blogs.msdn.com/b/virtual_pc_guy/archive/2012/12/07/everything-you-want-to-know-about-network-teaming-in-windows-server-2012.aspx