[mikester]

It's a little odd to need to do QOS on a local subnet - is your bandwidth on the local subnet that utilized?

Seriously - on a local subnet you should have plenty of bandwidth and not require QOS as much as you seem to. I'd really be interested in seeing a network diagram. Especially in a switched network - switching is at wire speed - the only bottleneck would be the two end devices in a communication unless your switch's backplane was maxed out.