Cable setup
From MikroTik Wiki
Basic Cable Internet Setup
First configuring interface that is connected to WAN.
/ ip address add address=192.168.1.20/24 network=192.168.1.0 broadcast=192.168.1.255 interface=ether2
I will be assuming that there are two LAN cards installed in your System. One interface is configured and connected to WAN (with ip 192.168.1.20/24). Now we will configure second interface for our Local Network using WinBOX.