PowerEdge: How to Enable Nested Virtualization with AMD EPYC Processors Running Windows Server 2022

Nested virtualization is a feature that allows running a Hyper-V inside a Hyper-V virtual machine (VM).

Guidelines and limitations:

• AMD first-generation EPYC or newer processor
• Microsoft guest OS version that is greater or equal to the host OS version (19636) or newer
• Currently third-party virtualization support is not available
• VM configuration version 9.3 or greater

To Configure Nested Virtualization:

1. Create a VM on the Host OS
2. With the VM in the OFF state, enable nested virtualization for the virtual machine with the following PowerShell command:

   Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $true 

3. Start the Virtual Machine
4. Install Hyper-V on the VM, see Install Hyper-V
5. Create a VM on the first (L1) level virtual machine created above
6. In order for network packets to be routed through two virtual switches, MAC address spoofing must be enabled on the first (L1) level of the virtual switch. This is completed with the following PowerShell command:

   Get-VMNetworkAdapter -VMName  | Set-VMNetworkAdapter -MacAddressSpoofing On 

References

• Enable Nested Virtualization
• AMD Nested Virtualization Support