Re: [LARTC] Big problem :(((((

Andy Furniss Thu, 04 Nov 2004 04:28:27 -0800

Cireasa Claudiu wrote:

Hello!

I have an internet connection of 64kbps garanteed in a channel of 256kbps. On this 
connection the metropolitan speed is 10Mbps and in the provider's network the speed is 
100Mbps.
I have a few clients behind my linux box and i want to set up some limitations because 
some of them are using it irrational.

I am marking the packets with 0 for internet;


0 means unmarked.

1 for metropolitan 2 for provider's network.

Afther the mark i send the packets to the followind classes:


You can test your marking/setup with

tc -s -d class ls dev ethX or

tc -s -d qdisc ls dev ethX.

script for eth0 (eth0 is my local network)
#!/bin/bash
tc qdisc del dev eth0 root >/dev/null
tc qdisc add dev eth0 root handle 1: htb default 3
tc class add dev eth0 parent 1:  classid 1:1  htb rate 64kbit  ceil 256kbit burst 15k  
 quantum 1500            # Internet
tc class add dev eth0 parent 1:  classid 1:2  htb rate 10Mbit              burst 15k   
 quantum 1500            # Metropolitan
tc class add dev eth0 parent 1:  classid 1:3  htb rate 80Mbit              burst 15k   
 quantum 1500            # Provider
tc class add dev eth0 parent 1:1 classid 1:100 htb rate 64kbit 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 4kbit ceil 64kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:1001 handle 1001: sfq perturb 5 quantum 1500 tc class add dev eth0 parent 1:100 classid 1:1002 htb rate 4kbit ceil 64kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:1002 handle 1002: sfq perturb 5 quantum 1500 ... tc class add dev eth0 parent 1:100 classid 1:1020 htb rate 4kbit ceil 64kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:1020 handle 1020: sfq perturb 5 quantum 1500
tc class add dev eth0 parent 1:2 classid 1:300 htb rate 5Mbit prio 5 quantum 1500 
burst 15k
    tc qdisc add dev eth0 parent 1:300 handle 300: sfq perturb 5 quantum 1500
tc class add dev eth0 parent 1:300 classid 1:3001 htb rate 8kbit ceil 256kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:3001 handle 3001: sfq perturb 5 quantum 1500 tc class add dev eth0 parent 1:300 classid 1:3002 htb rate 8kbit ceil 256kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:3002 handle 3002: sfq perturb 5 quantum 1500 ... tc class add dev eth0 parent 1:300 classid 1:3020 htb rate 5kbit ceil 256kbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:3020 handle 3020: sfq perturb 5 quantum 1500
tc class add dev eth0 parent 1:2 classid 1:500 htb rate 80Mbit prio 5 quantum 1500 
burst 15k
    tc qdisc add dev eth0 parent 1:500 handle 500: sfq perturb 5 quantum 1500
tc class add dev eth0 parent 1:500 classid 1:5001 htb rate 8kbit ceil 8Mbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:5001 handle 5001: sfq perturb 5 quantum 1500

tc class add dev eth0 parent 1:500 classid 1:5002 htb rate 8kbit ceil 8Mbit prio 5 quantum 1500 burst 15k tc qdisc add dev eth0 parent 1:5002 handle 5002: sfq perturb 5 quantum 1500 ...
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.1  -j CLASSIFY --set-class 1:1001
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.1 -m mark --mark 1 -j CLASSIFY 
--set-class 1:3001
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.1 -m mark --mark 2 -j CLASSIFY 
--set-class 1:5001
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.2 -j CLASSIFY --set-class 1:1002
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.2 -m mark --mark 1 -j CLASSIFY 
--set-class 1:3002
iptables -t mangle -A POSTROUTING -o eth0 -d 10.0.0.2 -m mark --mark 2 -j CLASSIFY 
--set-class 1:5002
...


Haven't used CLASSIFY so am unsure if this is OK.

Peturb 5 is a bit low - it causes packet reordering and the default queue length for SFQ is 128 - too long.

In fact if you are going to shape someone to low bandwidth it would be best to further mark and give their interactive traffic priority over their bulk.


###END SCRIPT ETH0###


the script for eth1 (the interface witch goes to provider) is:

#!/bin/bash
tc qdisc del dev eth1 root >/dev/null
tc qdisc add dev eth1 root handle 1: htb default 4

tc class add dev eth1 parent 1:  classid 1:1  htb rate 64kbit  ceil 256kbit burst 15k  
 quantum 1500
tc class add dev eth1 parent 1:  classid 1:2  htb rate 10Mbit              burst 15k   
 quantum 1500
tc class add dev eth1 parent 1:  classid 1:3  htb rate 80Mbit              burst 15k   
 quantum 1500


tc class add dev eth1 parent 1:1 classid 1:100 htb rate 64kbit ceil 256kbit burst 
15k
    tc qdisc add dev eth1 parent 1:100 handle 100: sfq perturb 5 quantum 1500

tc class add dev eth1 parent 1:100 classid 1:1001 htb rate 4kbit ceil 64kbit    prio 5 
quantum 1500 burst 15k
    tc qdisc add dev eth1 parent 1:1001 handle 1001: sfq perturb 5 quantum 1500
...

tc class add dev eth1 parent 1:2 classid 1:300 htb rate 5Mbit prio 8 quantum 1500 
burst 15k
    tc qdisc add dev eth1 parent 1:300 handle 300: sfq perturb 5 quantum 1500

tc class add dev eth1 parent 1:300 classid 1:3001 htb rate 32kbit ceil 128kbit  prio 5 
quantum 1500 burst 15k
    tc qdisc add dev eth1 parent 1:3001 handle 3001: sfq perturb 5 quantum 1500
tc class add dev eth1 parent 1:300 classid 1:3002 htb rate 32kbit ceil 128kbit  prio 5 
quantum 1500 burst 15k
    tc qdisc add dev eth1 parent 1:3002 handle 3002: sfq perturb 5 quantum 1500
...

tc class add dev eth1 parent 1:3 classid 1:500 htb rate 80Mbit prio 8 quantum 1500 
burst 15k
    tc qdisc add dev eth1 parent 1:500 handle 500: sfq perturb 5 quantum 1500

tc class add dev eth1 parent 1:500 classid 1:5001 htb rate 128kbit ceil 8Mbit  prio 5 
quantum 1500 burst 15k
    tc qdisc add dev eth1 parent 1:5001 handle 5001: sfq perturb 5 quantum 1500
tc class add dev eth1 parent 1:500 classid 1:5002 htb rate 128kbit ceil 8Mbit  prio 5 
quantum 1500 burst 15k
    tc qdisc add dev eth1 parent 1:5002 handle 5002: sfq perturb 5 quantum 1500
...

iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.1 -m mark --mark 0  -j MARK 
--set-mark 1001
iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.1 -m mark --mark 1  -j MARK 
--set-mark 3001
iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.1 -m mark --mark 2  -j MARK 
--set-mark 5001

iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.2 -m mark --mark 0  -j MARK 
--set-mark 1002
iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.2 -m mark --mark 1  -j MARK 
--set-mark 3002
iptables -t mangle -A PREROUTING -i eth0 -s 10.0.0.2 -m mark --mark 2  -j MARK 
--set-mark 5002


You can't match local addresses here if you are doing NAT.

...


tc filter add dev eth1 protocol ip handle 1001 fw  flowid 1:1001
tc filter add dev eth1 protocol ip handle 3001 fw  flowid 1:3001
tc filter add dev eth1 protocol ip handle 5001 fw  flowid 1:5001

tc filter add dev eth1 protocol ip handle 1002 fw  flowid 1:1002
tc filter add dev eth1 protocol ip handle 3002 fw  flowid 1:3002
tc filter add dev eth1 protocol ip handle 5002 fw  flowid 1:5002


#END OF ETH1 SCRIPT#

After i start the scripts all the hosts encounters difficulties in accessing the 
internet... the web from the internet (class 1:1) are loading verry slow (20-30 
seconds); i have ping timeouts... yahoo messenger is connecting in about 20-30 
seconds... iti si a mess...
I know the bandwidth is verry small but even if there are 8 users online the bandwidth 
should divide and work much faster at least for web...
I think the script has problems in the part with the burst of 15k... can somebody tell 
me where is going wrong?

Please help,
    Claudiu.

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Re: [LARTC] Big problem :(((((

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