The Hyper-V host and guest must both be Windows Server 2016/Windows 10 Anniversary Update or later.
VM configuration version 8.0 or greater.
An Intel processor with VT-x and EPT technology — nesting is currently Intel-only.
There are some differences with virtual networking for second-level virtual machines. See “Nested Virtual Machine Networking”.
Configure Nested Virtualization
Create a virtual machine.
While the virtual machine is in the OFF state, run the following command on the physical Hyper-V host.
This enables nested virtualization for the virtual machine.
Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $true
Start the virtual machine.
Install Hyper-V within the virtual machine, just like you would for a physical server. For more information on installing Hyper-V see, Install Hyper-V.