Hi ; +---------+ +-----------+ +---------+ | server1 |---------- | linux box |---------------------| Client 1| +---------+ | +-----------+ | +---------+ | | +---------+----| |---- +---------+ | server2 | | Client 2| +---------+ +---------+ MY script: tc-htb3 qdisc del dev eth1 root ipchains -F tc-htb3 qdisc add dev eth1 root handle 10: htb default 20 r2q 40 tc-htb3 class add dev eth1 parent 10: classid 10:1 htb rate 50Mbit tc-htb3 class add dev eth1 parent 10:1 classid 10:100 htb rate 10mbit ceil 15mbit prio 1 tc-htb3 class add dev eth1 parent 10:1 classid 10:20 htb rate 3mbit ceil 50Mbit prio 7 ipchains -A fw -s <SERVER1> -d <CLIENT1> -m 100 ipchains -A fw -s 0.0.0.0 -d 0.0.0.0 -j ACCEPT tc-htb3 filter add dev eth1 protocol ip parent 10:0 prio 1 handle 100 fw classid 10:100 I've find one strange question about traffic control of classid 10:100 . Could you explain it ? thanks question: WHEN i send packets of classid 10:20 at 5mbit from "server2" to "client2" , I measure maximum TCP bandwidth of classid 10:100 by using"Iperf -1.6 -s " in server host and "iperf-1.6 -c <server1 address> " in client1 host, the bandwidth of classid 10:100 is only 3.5mbit. BUT when i stop sending packets of classid 10:20 t from "server2" to "client2" ,I measure maximum TCP bandwidth of classid 10:100 by using"Iperf -1.6 -s " in server host and "iperf-1.6 -c <server1 address> " in client1 host, the bandwidth of classid 10:100 is o 12.1mbit. OK. work well. WHY ? haipe _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/