How to set up automatic switching of Mikrotik 951ui-2hnd from wired to USB LTE whistle when the Internet is lost?

Question

Mikrotik

We have Mikrotik 951ui-2hnd. How to configure it so that it connects to the Internet via a wire, if there is a wire and it has Internet? And by whistle (USB dongle), if there is no Internet in the wire?
And the same question, taking into account different models of whistles? Part is seen as LTE, and part is seen as PPP.
Update: I completely forgot to clarify, there may not be a wire or a whistle at all. That is, for example, the PPP interface may, in principle, be absent. And the script should be able to handle such a case.

Answer 1

add a default route with a longer distance on lte and specify check-gateway on the wire

Answer 2

I'm just talking about this here
) If ppp - then make a static IP remote according to the first scheme

Answer 3

Everything is possible... it-pages.ru/ehffektivnyjj-failover-na-mikrotik-bez...

Answer 4

Universal script for switching 2 channels of the Internet , for the very lazy :)

Answer 5

I completely forgot to clarify. There may be no wire or whistle at all. That is, for example, the PPP interface may, in principle, be absent. And the script should be able to handle such a case.