Hi, I hope you can help, the attached diagram shows overall what my network consist of, I understand cisco phones mark packets via DSCP marking, where else in the network do I need to apply QoS for this marking and also RTP? (L3 or L2 interfaces, both?) I have 4500 access switches connected via L3 links to 6500's which connect to the WAN via a L3 300 MB sonet ring and connect to another site with the same configuration, also, what would be a standard class map configuration or QoS policy that I would need to apply on these devices to prioritize VoIP, thanks again.