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

[Andy Furniss <andy.furniss@dsl.pipex.com>]

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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