How to make the right route?

Question

ASP.NET

There is a controller with an index method that takes 3 parameters.
routes.MapRoute("Home", "{link}/{sublink}/{filter}", MVC.Home.Index()
.AddRouteValue("link", UrlParameter.Optional)
.AddRouteValue("sublink", UrlParameter.Optional )
.AddRouteValue("filter", UrlParameter.Optional));
How to make a route?

Answer 1

1) If it MANDATORY takes 3 parameters - throw out the block

.AddRouteValue("link", UrlParameter.Optional)
.AddRouteValue("sublink", UrlParameter.Optional)
.AddRouteValue("filter", UrlParameter.Optional));

2) The basis of routing is not your parameters, but controller and action. Who will actually handle your request.
I don't see how the pointing to the controller happens.
3) there is such a record

context.MapRoute(
                "AreaName_default",
                "AreaName/{controller}/{action}/{id}",
                new { action = "Index", id = UrlParameter.Optional }, namespace где ищем контроллеры" }
            );

Here 1 call to MapRoute is made. You have added 3 extra calls. What for? Space to save?