Adding two bandweight at a time

I am new in networking. I have one line active in ether 1 , ether 2 is the output and now i want to add another 1 MB bandwidth in ether 3 as input. How can I do it?
HELP PLEASE.

MikroTik RouterOS offers plenty of features to achieve load balancing. More information is required from you how you want to configure load balancing.
You can

  • share two lines between all clients;
  • set second line for specific users;
  • set second line only for specific services.