Hi, i read some threads regards this option but i'm not sure if my settings are corrects. I have 1/20Mbps ADSL2 with the modem in bridge LLC/snap mode and the N66U in PPPoE so i set the QOS dsl overhead value in tomato to "40 - PPPoE LLC/SNAP" and for max bandwidth limit the link speed that in my case is 1004295/222236744 so 970/21700kbits. Speedtest give me an average speed of 0.84Mb/18.74Mb. This option could calculates the correct overhead for you without needs to insert the the real speed minus 15-30%. With these values all my class limit are incorrect because tomato calculates the limits from "max bandwith limit". For example: with FileXfer outbound limit to 100%, tomato calculate 21700Kbit=2712KB/s but my max download speed is about 2350KB/s=18.74Mb/s. Qos works properly with these settings?