Multi Homed VM's Using Distributed Switch

Hi Folks,

I have two groups of VM's . Group 1 VM's should be available over LAN and Group 2 VM's are private (will communicate with Group1 VM's only). In case of standard switch I can create two Switches one connected to physical NIC (External) and another not connected to any physical NIC (Private)  .Then I will created create Group 1 VM's with two vNIC's connected  to External and Private switches respectively and Group 2 VM's having one NIC connected to Private switch.

But in case of distributed switch how to achieve this.  I am not able to create DSwitch without connecting to physical NIC and the vNIC's in VM's show disconnected.

Thanks and Regards

J.P Raj