Very interesting article about managing virtual switches and centrally configuring them across all hosts on DavidZ blog http://blogs.technet.com/b/davidzi/archive/2010/09/09/managing-virtual-switches-and-networks-across-hyper-v-hosts.aspx

From his article “Managing virtual switches should be done from a central point and the configuration should be automatically distributed to the host operating system in such a way as to eliminate the need for a separate configuration switches for each of the hosts.”

I’d advise reading it…