i had a question regarding QOS in layer2 mode. i have about 3 3560's in between 2 routers and i'm marking traffic at these edge routers with dscp. if I trust dscp in between both routers and all three switches will the switches automatically do the dscp-to-cos mapping or will i have to trust cos between the switches? Is mls qos rewrite ip dscp global command same as mls gos trust dscp on an individual interface? on the 3560 which when i try to create a class-map to match traffic i get ip dscp as one option, will the switch really match traffic against dscp in layer2 mode?