I have a trunk connection coming in to a customers location, we need to break out a VLAN and untag it on a port, then on the rest of the ports use a vlan from that trunk as the WAN and NAT with DHCP. Is this even possible? We are have a CRS12-8P

I have a trunk connection coming in to a customers location, we need to break out a VLAN and untag it on a port, then on the rest of the ports use a vlan from that trunk as the WAN and NAT with DHCP. Is this even possible? We are have a CRS12-8P
