Error VT-x not available for Vagrant machine inside Virtualbox

Question

I have an Ubuntu Virtual machine that is configured to have VT-x enabled, 6 Processors, and 25 GB RAM.

Inside that virtual machine I am trying to start a vagrant mac

Answer 1

If you run vagrant + VirtualBox within a VirtualBox virtual machine and you face networking problems :

Don't forget to set the right virtual network adapter

I had to set the Adapter type to Paravirtualized Network (virtio-net)

in Settings -> Network -> Advanced to make it work