Sroute and vias in Encounter

Hi.

I have the following problem: I'm using Encounter. I have a 'L-shape' floorplan, and I can put power rings (so, VDD and VSS lines) only in vertical direction using M2 layer (and this is working). Then, I have to connect these lines on opposite sides with horizontal connections (using M1). At the moment to do it I'm using the sroute command, and Encounter is able to connect correctly these lines; is it correct using the sroute command? or it would be better to use the addStripe command? And, even more important, what is the difference between stripe and sroute? to me, they seem to do the exact same thing.

Question 2: suppose I can connect in the right way VDD and VSS lines using the sroute. Now, I can see auto-generated vias at the intersection between horizontal and vertical layout lines. But these vias are not the vias defined in the LEF file, as far as I can understand. They are custom vias. How can I tell to Encounter to use other vias or, at least, put manually the LEF-via and not the custom-generated via?

Thanks for help!

Francesco.