Hi! I''m using class based queueing for testing how same applications work with low bandwidth. So what I did was give this commands: tc qdisc add dev eth0 root handle 10: cbq bandwidth 100Mbit avpkt 1000 tc qdisc add dev eth1 root handle 20: cbq bandwidth 100Mbit avpkt 1000 tc class add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 100Mbit rate 100Mbit allot 1514 weight 1Mbit prio 5 maxburst 20 avpkt 1000 tc class add dev eth1 parent 20:0 classid 20:1 cbq bandwidth 100Mbit rate 100Mbit allot 1514 weight 1Mbit prio 5 maxburst 20 avpkt 1000 tc class add dev eth0 parent 10:1 classid 10:100 cbq bandwidth 100Mbit rate 2Kbit allot 1514 weight 2Kbit prio 5 maxburst 20 avpkt 1000 isolated tc class add dev eth0 parent 10:1 classid 10:200 cbq bandwidth 100Mbit rate 102398Kbit allot 1514 weight 1022Kbit prio 5 maxburst 20 avpkt 1000 isolated tc class add dev eth1 parent 20:1 classid 20:100 cbq bandwidth 100Mbit rate 2Kbit allot 1514 weight 2Kbit prio 5 maxburst 20 avpkt 1000 isolated tc class add dev eth1 parent 20:1 classid 20:200 cbq bandwidth 100Mbit rate 102398Kbit allot 1514 weight 1022Kbit prio 5 maxburst 20 avpkt 1000 isolated tc qdisc add dev eth0 parent 10:1 sfq quantum 1514b tc qdisc add dev eth1 parent 20:1 sfq quantum 1514b tc filter add dev eth0 parent 10:0 protocol ip prio 10 u32 match ip src 0.0.0.0/0 flowid 10:100 tc filter add dev eth1 parent 20:0 protocol ip prio 10 u32 match ip src 0.0.0.0/0 flowid 20:100 (has you can see I''m testing with bandwidth = 2K) Now, WHY DOES NOT WORK? It seams that it using all 100Mbits ____________ ____________ ( ) ( ) (57.227.234.0/23)--------|Linux|---------(192.168.76.0/24) (____________) eth0 eth1 (____________) 57.227.235.12 192.168.76.1 thanks -vcf