If you are just looking to import an AutoCAD drawing as a 2D or 3D object, then follow the steps described.
If you were hoping to import a collection of objects, that is not currently supported. Each import brings in exactly one object, and no division into its sub-objects is possible.
Most people import the AutoCAD "object" to use as a background or framework and then place other objects on top of it.
VP Operations, Simio LLC