We've even followed the examples here by Keith
http://blogs.technet.com/b/keithmayer/archive/2013/04/11/configure-network-fabric-and-network-virtualization-using-system-center-2012-sp1-vmm-build-your-private-cloud.aspx
and it does not work.
Error (505)
Virtual Machine Manager was unable to create a new virtual switch New Virtual Switch0.
Unknown error (0x80041001)
Recommended Action
Check the virtual switch name, and then try the operation again.
Any ideas?
Andrew Hancock