Connecting VMs through a switch?

[popescu]

I want to create a DMZ-style network, and I don't know how to connect my vms in the LAN part, where I will have a Win server, and a few win 10 vms (the so-called DMZ, with a server will also be here). Do I have to add a linux VM in this LAN, and install open vSwitch on it, or I can just create vlans on my actual physical interface (vmbr1), without a virtual switch?
(vmbr0 will be used for the WAN part of the network)

Thanks!