Mikrotik rb2011 ui as-rm how to set up two providers and two local networks isolated from each other?

Question

Mikrotik

There is Mikrotik RB2011 ui as-rm. There are two providers and two organizations, and Mikrotik RB2011 ui as-rm is one))) The task on it is to divide two providers into two local networks that will be isolated from each other! Has anyone done something like this? What to see? What to read?

Answer 1

two bridges, two connections with providers, to send traffic to the second provider - we mark the traffic and route through a separate table.
Well, a firewall to prohibit traffic between the bridges.