VMware: x64 virtual machines within nested ESXi Hosts

Hi,

if you plan to run an ESXi Host within an ESXi Host and enabling support for 64-bit for VMs some additional settings are requiered:

  • The VM version must be at least version 9. This version could only created with the (flash) webfrontend. The Windows Client supports only versions up to 8.
  • At the CPU settings the switch “Expose hardware assisted virtualization to guest OS” must set.

    VMware: Expose hardware assisted flag

    VMware: Expose hardware assisted flag

  • Or add the parameter in the vmx file of the virtual machine in which the virtualized ESXi host should run. To enable hardware “assisted virtualization” The parameter
    vhv.enable=true
    must be set.

This error occurs if one these requierments are not fulfilled: “Longmode is unsupported. It is required for 64-bit guest OS support. On Intel systems, longmode requires VT-x to be enabled in the BIOS. On nested virtual ESX hosts, longmode requires the “Virtualized Hardware Virtualization” flag to be enabled on the outer VM.”

Michael

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