How to configure a router to become the root of the STP tree?

Question

network hardware

In packet tracer, if you connect switches with redundant links, then they (links) are disabled, which breaks the loops, in general, stp works properly by default. But this does not happen with the router, what setting should be done on the router? It only comes to mind to create a bridge between fa 0/0 and fa 0/1

Answer 1

Do you need an answer about how to set up a router or about how to implement it in PT?
In the first case, such a network should not be built (it is better to use other fault-tolerance mechanisms), in the second case, in the bridge properties, among other things, you need to enable the Spanning-tree and set the cost on it lower than the default (so that it becomes the root), I can't tell if your (or any) version of PT supports this functionality.