Hyper-V Update to Improve Network Stability
If you've deployed your ISA Server, Microsoft IAG, Forefront TMG or Forefront UAG on Hyper-V R2 and noticed that a connection between the guest and the virtual switch starts "acting odd", perfoms poorly or becomes disconnected entirely, you may want to apply this update:
http://support.microsoft.com/kb/974909
Thanx to the Hyper-V team for this update!
Jim Harrison, Program manager, FF Edge CS