I want OPNsense to act solely as a firewall and to do NAT translation for me. I have a robust Layer 3 switch I'm using to do my routing by utilizing SVI. What's the best implementation of this? And what advice would you offer or best practices would you point out? A point to point between the firewall and the switch? Do I need to build those VLANs on OPNsense as well? Any advice is appreciated.