Divide bandwidth between 4 groups of ip with the same rate

["CVEREDA@xxxxxxxxxxxxxx" <CVEREDA@xxxxxxxxxxxxxx>]

Hello, I have begun to use the tc scripts since 2 weeks ago, so I am beginner. I am trying to divide my bandwidth in 4 independent ones. Each of these sub-bandwidths is assigned to 4 different groups of ip. Bandwidth sharing is allowed. I put a Linux with two Ethernet card between the router and the LAN. Eth1 is the card connected to the router and eth0 is the one connected to the LAN. My ISP provides 3 mbit upload and 300 kbit download. I define 4 classes for download with a rate of 300kbit and a ceil of 2700 kbit (1:10 to 1:40, parent 1:12). In the same way, I define 4 classes for upload with a rate of 72kbit and a ceil of 200kbit (2:10 to 2:40, parent 2.12). Everything looks work fine, nevertheless when traffic through one of these classes are near to its ceil (200kbit), the http traffic through the rest of the classes becomes slow, and I do not understand whit the free 56 kbit is not used by these traffic. Whatever, htb should decrease the rate of the abusive class, should not?

Thank you in advance for your teaching.

The script that I am using is:

#Shaping in eth0 for download traffic
tc qdisc add dev eth0 root handle 1: htb default 50
tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit
tc class add dev eth0 parent 1:1 classid 1:11 htb rate 80mbit ceil 100mbit
tc class add dev eth0 parent 1:1 classid 1:12 htb rate 2700kbit ceil 2700kbit prio 7
tc class add dev eth0 parent 1:12 classid 1:10 htb rate 300kbit ceil 2700kbit prio 7
tc class add dev eth0 parent 1:12 classid 1:20 htb rate 300kbit ceil 2700kbit prio 7
tc class add dev eth0 parent 1:12 classid 1:30 htb rate 300kbit ceil 2700kbit prio 7
tc class add dev eth0 parent 1:12 classid 1:40 htb rate 300kbit ceil 2700kbit prio 7
tc class add dev eth0 parent 1:12 classid 1:50 htb rate 30kbit ceil 270kbit prio 7
tc filter add dev eth0 protocol ip parent 1:0 u32 match ip dst 192.168.0.0/26 flowid 1:10
tc filter add dev eth0 protocol ip parent 1:0 u32 match ip dst 192.168.0.64/26 flowid 1:20
tc filter add dev eth0 protocol ip parent 1:0 u32 match ip dst 192.168.0.128/26 flowid 1:30
tc filter add dev eth0 protocol ip parent 1:0 u32 match ip dst 192.168.0.192/26 flowid 1:40

#Shaping in eth1 for upload traffic marking packets at mangle
tc qdisc add dev eth1 root handle 2: htb default 50 
tc class add dev eth1 parent 2: classid 2:1 htb rate 10mbit
tc class add dev eth1 parent 2:1 classid 2:11 htb rate 8mbit ceil 10mbit
tc class add dev eth1 parent 2:1 classid 2:12 htb rate 256kbit
tc class add dev eth1 parent 2:12 classid 2:10 htb rate 72kbit ceil 200kbit prio 7
tc class add dev eth1 parent 2:12 classid 2:20 htb rate 72kbit ceil 200kbit prio 7
tc class add dev eth1 parent 2:12 classid 2:30 htb rate 72kbit ceil 200kbit prio 7
tc class add dev eth1 parent 2:12 classid 2:40 htb rate 72kbit ceil 200kbit prio 7
tc class add dev eth1 parent 2:12 classid 2:50 htb rate 10kbit prio 7

tc qdisc add dev eth1 parent 2:10 handle 210: sfq perturb 10
tc qdisc add dev eth1 parent 2:20 handle 220: sfq perturb 10
tc qdisc add dev eth1 parent 2:30 handle 230: sfq perturb 10
tc qdisc add dev eth1 parent 2:40 handle 240: sfq perturb 10

iptables -A FORWARD -t mangle -i eth0 -j MARK -s 192.168.0.0/26 --set-mark 1
iptables -A FORWARD -t mangle -i eth0 -j MARK -s 192.168.0.64/26 --set-mark 2
iptables -A FORWARD -t mangle -i eth0 -j MARK -s 192.168.0.128/26 --set-mark 3
iptables -A FORWARD -t mangle -i eth0 -j MARK -s 192.168.0.192/26 --set-mark 4

tc filter add dev eth1 protocol ip parent 2:0 handle 1 prio 16 fw flowid 2:10
tc filter add dev eth1 protocol ip parent 2:0 handle 2 prio 16 fw flowid 2:20
tc filter add dev eth1 protocol ip parent 2:0 handle 3 prio 16 fw flowid 2:30
tc filter add dev eth1 protocol ip parent 2:0 handle 4 prio 16 fw flowid 2:40


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