Bruno Wolff III wrote: >> [root@bruno bruno]# tc filter add dev ppp0 parent 1:0 protocol ip >> prio 10 u32 match ip tos 0x10 0xff flowid 1:10 RTNETLINK answers: >> Invalid argument Have you loaded the cls_u32 module? In fact, there are a few other tc related modules you might need to load. For reference, this is what I load at this end for tc. # Traffic Shaping Stuff sch_htb sch_sfq sch_ingress cls_fw cls_u32 Steve Cowles