Is the logical model for setting up two Mikrotiks correct?

Question

Computer networks

Greetings!
The question is:
There is such a scheme. On the first Mikrotik, it was configured to switch the channel to a backup one, when the main one breaks, but it has not been tested in battle.
From the second Mikrotik, the client simply connected to the ip address of the first provider and it all worked merrily.

spoiler

how it was supposed to work when the main provider fell off along with the address, I have no idea

It so happened that on the first Mikrotik the main provider will be disabled, the backup will become the main one, plus another one will be connected as a backup. And on the second Mikrotik, another provider will appear, which will become the main one, and the current one will go into reserve.
So, the problem is: you need to make sure that the tunnel between two microns works constantly, with any combination of enabled providers (for example, on two backup ones).

I understand correctly that I need to first configure both micros in the usual way to work with two providers and switch on break, and then, on the client micro, set up two connections to the server - one to the main provider, the other to the backup. Therefore, switching the provider on the client microtik will not be critical, because it goes along the active route, but if a switch occurs on the server microtik, the client one will simply start the second connection, breaking the first one.
Please correct where I'm wrong.
Or, if you know the scheme better - I will be very grateful!

Answer 1

Look for information on setting up bonding on Mikrotik, it’s just through bonding that you completely implement channel switching in active backup mode. (It works for me, I checked it). Offhand, create a bonding interface, add provider interfaces, set activ backup mode, add 2 routes to 0.0.0.0/0 in routes through provider gates with different distances and check the gate with a ping.
Further, I think, just configure l2tp to two static addresses (main and backup provider) on both sides. ("But this is inaccurate")