Setting the distance for the l2tp connection route

There is a client l2tp connection.
This connection adds a default route.
How to make this route have a distance greater than 1?
This connection is a backup and it is necessary that it route traffic through itself only when the main connection (which is via ethernet) drops.

You can specify it when you create the l2tp-client:

 /interface l2tp-client add add-default-route=yes default-route-distance=10

Many thanks!!!