VirtualBox nested inside ESXi VM - Bridged network

Hi there,

I need to run a virtualbox VM inside a host VM that is running over an ESXi. The required network configuration for the virtualbox VM is bridged adapter. I managed to run it on vmware workstation with no problem. However, I cannot make the virtualbox VM properly communicate to the outside world when I try to set up the whole environment on ESXi.

Does anybody know how to set up network configuration on ESXi 6.0 to allow the a VirtualBox VM communicate to other machines using a bridged adapter?

Thanks.