I would like to setup a test environment of VMs on Server 2019 Hyper-V that eventually migrating all current physicals to VMs. I currently have Small Business Server 2011 standard with a backup domain controller and File server on a given network. I would like to make sure I can safely setup and test the VMs on an isolated network. I have setup a test workgroup for the Hyper-V machine separate from the current domain. Is that enough to prevent any issues or do I need to create a separate subnet for the Hyper-V as well?