Is it possible to add a constraint/cost attribute to Network Analyst that specifies the total route length be a certain value (e.g. total route length = 100 miles)? In other words...I want to map a route between a set of points but the total route length cannot be greater than 100 miles.
What solver are you trying to use? For example the route solver will find a path between the stops you load in. It is not going to constrain itself to a length limit. But Closest Facility does have such a cutoff. With that solver, you can use it solve for all (or some) facilities within a cutoff of 100 miles.