Hello,
I have just bought an RV320.
I have two vlans. One /24, which I'm going to connect to an ethernet port.
Another vlan which is a /16 network and I'm going to connect to the DMZ port, regarding the fact that, this is the only port that allows to set a /16 ip address.
Internet connected to the WAN port.
I can't reach any site from LAN ports, but I can't reach the Internet from a computer connected to the DMZ port.