How do I create a Logical Switch with a single physical NIC?

I'm trying to create a Logical Switch with a single physical NIC on the WS2012 host in VMM 2012 SP1. I've created a Fabric Logical Switch and used most of the material from the following blog (without the Teaming), but it fails when I attempt New Virtual Switch followed by New Logical Switch in Host Properties/Virtual Switches.

The error is: "VMM cannot create a virtual switch without any physical network adapters."

(The physical adapter is allocated to a Hyper-V Switch used with all the existing VMs)

http://kristiannese.blogspot.no/2013/02/configure-nic-teaming-and-qos-with-vmm.html