ESXi 6 on virtualbox

[stalemate97]

Hi
I'm currently studying vmware because it's the hypervisor used for my job.
I'm successfully installed ESXi 6 as guest on my Windows Host virtualbox (64bits).

Esxi run well. I decided to create vm linux 64bits but when I start it it say to me this message :
On Google we can see that many tutorials use 32bits vms but not 64 bits. Is there a limitation ?

this is the message :
Failed to start virtual machine 'server64'. Reason: This virtual machine is configured for 64-bit guest operating systems. However, 64-bit operation is not possible. This host does not support Intel VT-x

But in Esxi Virtualbox Guest configuration, it is correcty check (vt-x/amd-v is on).

Is it possible to start 64 bits vm on esxi guest ? it seems that vt-x support is not passthrough to the vm inside my esxi guest
I don't want to use another hypervisor as "vmware workstation" because i m an intensive use of Gns3 (work with virtualbox).

Thanks for your help.

thanks for your reply.

[Perryg]

Nested Virtualization is not supported. So short answer is it will not work for 64-bit guests.

[stalemate97]

May be in future release, I hope.

I'm a great user of virtualbox since many years.

Thanks for your reply.