I have put together a QoS implementation between 3 6509 on each of our sites.
From what I have read the classification happens ingress on a port/vlan.
This is fine for all user and server vlans behind the switches, but what happens for traffic generated on the switch, i.e routing. I can't see how I can mark my EIGRP traffic before it traverses the WAN which is a bit like shutting the barn door after the horse has bolted.
I'm probably missing something obvious here but would appreciate anyone putting me straight.