Hi,
  Internet---------[linux]---------network
				eth0     eth1
	(192.168.1.103)		(172.16.1.1)
I can control traffic with the following:
#begin *****************************
tc qdisc add dev eth1 root handle 10: cbq bandwidth 100Mbit avpkt 1000
tc class add dev eth1 parent 10:0 classid 10:1 cbq bandwidth 100Mbit \
	rate 10Mbit allot 1514 weight 1Mbit prio 8 maxburst 20 avpkt 1000
tc class add dev eth1 parent 10:1 classid 10:100 cbq bandwidth 100Mbit \
	rate 8Mbit allot 1514 weight 800Kbit prio 5 maxburst 20 avpkt 1000 bounded
tc class add dev eth1 parent 10:1 classid 10:200 cbq bandwidth 100Mbit \
	rate 2Mbit allot 1514 weight 200Kbit prio 5 maxburst 20 avpkt 1000 bounded
tc qdisc add dev eth1 parent 10:100 sfq quantum 1514b perturb 15
tc qdisc add dev eth1 parent 10:200 sfq quantum 1514b perturb 15
tc filter add dev eth1 parent 10:0 protocol ip prio 25 u32 match \
	ip dst 172.16.0.0/16 flowid 10:200
#end ******************************
But cannot with the following: 
#+++++++++++++++++++++++++++++++++++++
tc qdisc add dev eth0 root handle 12: cbq bandwidth 10Mbit avpkt 1400
tc class add dev eth0 parent 12: classid 12:1 cbq bandwidth 10Mbit rate 10Mbit
allot 1514 weight 1Mbit prio 2 maxburst 20 avpkt 1400
tc class add dev eth0 parent 12:1 classid 12:212 cbq bandwidth 10Mbit rate
256Kbit allot 1514 weight 25Kbit prio 5 maxburst 20 avpkt 1400
tc class add dev eth0 parent 12:1 classid 12:213 cbq bandwidth 10Mbit rate
64Kbit allot 1514 weight 6Kbit prio 5 maxburst 20 avpkt 1400 bounded
tc class add dev eth0 parent 12:1 classid 12:300 cbq bandwidth 10Mbit rate 3Mbit
allot 1514 weight 300Kbit prio 3 maxburst 20 avpkt 1400
tc qdisc add dev eth0 parent 12:212 sfq quantum 1514b perturb 15
tc qdisc add dev eth0 parent 12:213 sfq quantum 1514b perturb 15
tc qdisc add dev eth0 parent 12:300 sfq quantum 1514b perturb 15
tc filter add dev eth0 parent 12:0 protocol ip prio 10 u32 match ip src
172.16.0.0/16  flowid 12:300
#+++++++++++++++++++++++++++++++++++++++++++
What wrong with the latter?  Please help me. Thanks.
regards,
            Chuanbo Xu
            iproute2@btamail.net.cn