Re: [LARTC] Measuring Bw alloted in classes

[Stef Coene <stef.coene@docum.org>]

On Friday 22 February 2002 17:38, Rajesh Revuru wrote:
> HI all..
>
> Iam using tc for testing diffserv fucntionalites.
>
> My basic interest is to allocate two classes for TCP and UDP and allot diff
> bw shares and test applying traffic generators.
>
> Iam using CBQ as my queueing discipline...
>
> tc qdisc add eth1 handle 10:root cbq allot 100Mb avpkt 100 bandwidth
> 100Mbit
>
> Class 1:tc class add dev eth1 parent 10:1 root cbq weight 2 allot 40mb prio
> 2 avpkt 1000 rate 60mbit bandwidth 60mbit bounded isolated
>
> Class 2:tc class add dev eth1 parent 10:2 root cbq weight 7 allot 30mb prio
> 7 avpkt 1000 rate 60mbit bandwidth 60mbit bounded isolated
>
> filter 1:tc filter add dev eth1 prio 2 protocop ip root handle 1 fw classid
> 10:1
>
> filter 2:tc filter add dev eth1 prio 7 protocop ip root handle 2 fw classid
> 10:2
>
> ipchains -I output1 -p tcp -m 1
>
> ipchains -I output2 -p udp -m 2
FIrst of all, the bandwith of the classes attacjed to a qdisc must be the 
same.  So in your cas 100mbit.
Second, you need to create a bounded class and attach it to the root qdisc 
with rate = bandwith.  Attach both other class to this class in stead of the 
root qdisc.
And don't use the isolated parameter.  It's not working.
And take weight = rate /10.

>  Question 1:
>
> My intention is to apply a class.1 to TCP traffic class no.2 to UDP
> traffic. Is that acheived? Iam using Iptraf to check the statistics at the
> interfaces.. but i see a little difference
The filters and ipchains commands are OK.

> Question 2:
>
> Is there any way where i can check the bw alloted to diff classes
> graphically or by numbers?
I have some scripts on www.docum.org.  First script is monitor.pl and it 
gives a real time bandwith usage of the classes (it uses the byte counters of 
iptables/ipchains and not the output of the tc command).  I have a 
web-interface example here : http://qos.dyndns.org:8080/cgi-bin/monitor.pl
I have also a version that can be used in a terminal.

I also wrote a new script.  It uses the 
output of tc and rrd to create 
some graphs (http://home.docum.org/stef.coene/qos/gui/rrd.html).

Hope this helps

Stef

-- 

stef.coene@docum.org
 More QOS info : http://www.docum.org/
 Title : "Using Linux as bandwidth manager"
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