On RouterOS how do I make one port dedicated WAN Port

Hi,

I recently purchased CRS312-4C+8XG-RM, I want to turn on DHCP Server inside my Router and I want to make 1 port a WAN Port. I use this switch in venues where i am given internet from the venue but I dont want to use their IP pool so I want to make my own DHCP server inside RouterOS and dedicate a port for the venue Internet.

dynamic IP use IP DHCP client
Static IP add the address provided and gateway in IP address and make the interface the port you desire.
In either case ensure etherX is part of the WAN interface list.