Auto Route
Auto Route enables you to:
Route automatically through existing geometry
in the 3D route sketch.
Route automatically through certain objects that
are outside the route sketch.
Update routes to travel through selected clips.
Update routes to travel through any axis.
Display guidelines that show wires from imported
from/to data, manipulate those guidelines, and convert them into routes.
To route automatically:
While editing a route, click Auto
Route 
(Routing Tools toolbar) or click Routing,
Routing Tools, Auto
Route.
Set options in the Auto Route PropertyManager:
Click 
.
You can also route automatically by dropping
cable clips
in the route.