Hello! I have a problem with i detalied in an early mail but there was no answer so i will try to be more specific. i have this tc class add dev eth0 parent 1: classid 1:1 htb rate 64kbit ceil 256kbit burst 15k quantum 1500 tc class add dev eth0 parent 1:1 classid 1:100 htb rate 32kbit ceil 256kbit burst 15k tc qdisc add dev eth0 parent 1:100 handle 100: sfq perturb 5 quantum 1500 tc class add dev eth0 parent 1:100 classid 1:1001 htb rate 8kbit ceil 64kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:1001 handle 1001: sfq perturb 5 quantum 1500 when i add more clients for the class 1:100 and i start the script problems such as request timeout and verry slow speed (0,5kbps) appear where is the problem... ? is the burst too big? how should it be set? the perturb is too small? i used SFQ... each queue should have her turn once in a while... if i send 10 ping requests from a host at least 2 of them are timeouts... why? i am stuck please help. Claudiu.