im trying to understan qdisc && classes..i founded this example in docum.org.. some things i dont get..how do i say wich kind of traffic goes to classid 1:10/1:11/1:12 ? based on what? ip? tos? what? tc qdisc add $DEV root handle 1: htb default 10 tc class add dev eth0 parent 1: classid 1:1 htb rate 100kbps ceil 100kbps burst 2k tc class add dev eth0 parent 1:1 classid 1:10 htb rate 30kbps ceil 100kbps burst 2k prio 0 tc class add dev eth0 parent 1:1 classid 1:11 htb rate 10kbps ceil 100kbps burst 2k prio 1 tc class add dev eth0 parent 1:1 classid 1:12 htb rate 60kbps ceil 100kbps burst 2k thanks in advance Esteban.