what type of VM you are using? You use a one switch to connect all? it would be nice to see the scheme…….
Here goes a crude ASCII drawing. I’m using Vmware’s ESXi hypervisor.
LAN VM switch 2 <
> ETH00 Zeroshell ETH01 <
> VM switch 1 Internet
Each VM switch is utilising its own NIC. And the 2 NICs are on independant networks.
Let me know if you need more info.