MikroTik

I have with my ISP 13 ips and a gateway. what I want to do Is have 2 interfaces (lan/wan) on the router and have one connected to the wan side that goes directly to the isp with direct access to the 13 ip's and the gateway lets say they are 77.77.100.2 through 77.77.100.14 with gateway 77.77.100.1 (netmask is /24) On my lan interface , I'd like to have a switch connected that will have several servers connected. some of the servers will have the actual wan ips on the machines ( say 77.77.100.2 through 9) the rest I'd like to have on local ips that I will nat to external ips 77.77.100.10 through 14) Would I use bridging and how could i do this? Would it be better to have 3 interfaces? I know this may sound newb, But i do have a good grasp of natting the locals to externals. I really need to be able put the real external ips on some of the servers on the lan side.

Switch need to have vlan capability.

What I ended up doing was just to bridge the WAN and LAN Ports And then put the External IPs that I need to NAT to local ips on the bridge. It works. Any servers I want to have the actual external IPs I put the external IPS on and connect to the LAN port the same as servers that have local ips.