how use single interface for both ISP and for local network.

RouterOS Beginner Basics
1

I am new to mikrotike i have mirkotick base box 2 .
Quetions.
I want to terminate ppoe on this basebox .
can you guide me.

2

Sure we can guide you. We just need some more explanation what kind of physical setup you have in mind (including ISP’s box and any other LAN equipment you have).