How to Enable MAC Address Spoofing in ESXi 7.0 vSwitch

Setup: I have a nested VM setup where I have a Hyper-V 2016 host running on top of ESXi 7.0, for a lab environment. The nested VM's are running just fine.

Problem: The nested VM's can only ping/communicate with their host. They cannot ping anything outside of the host, not even the NAT firewall they successfully receive DHCP addresses from.

I found this document from Microsoft that shows how to properly setup a nested VM environment: Nested Virtualization | Microsoft Docs

In that document, I believe it highlights a setting that is probably the source of my problem. It says I need to configure Mac Address Spoofing at the level 1 virtual switch. But it only shows how to do that in Hyper-V.

So I need to know how to enable Mac Address Spoofing on a ESXi 7.0 virtual switch.

Any ideas?

thanks