Can anyone tell me how the voice traffic originated by a Cisco Soft Phone (CIPC Client) can be marked and clasified. As far as I know CIPC client mark the traffic with DSCP value itself. Now my concern, is that marking will be trusted by the edge/access switch and other consecutive switches or it has to be marked in the edge/access switches once again. The problem is for a CIPC client the voice traffic is carried on the same data vlan along with the normal data which is originated from the client where the CIPC client is running as well. How this voice trafiic can be prioritised over normal data traffic ?