From mboxrd@z Thu Jan 1 00:00:00 1970 From: Debian Usero stafke@iname.com Date: Mon, 05 Feb 2001 07:01:51 +0000 Subject: [LARTC] Allocate bandwidth according to services HTTP, FTP, SMTP & MIME-Version: 1 Content-Type: multipart/mixed; boundary="------------0BE005491476BB0B84588196" Message-Id: List-Id: References: In-Reply-To: To: lartc@vger.kernel.org 
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Rick Goh Siow Mong wrote:
> 
> Is the above possible? If so, how? Has anyone implementated this before?
Yes, it've dont it as a test and it wordks great.  I'v attached my
results as a HTML-file.

> 
> Example;
> To set
> 
> HTTP - 30%, prio 3 (1 being highest priority)
> FTP - 20%, prio 7
> POP/SMTP - 30%, prio 4
> Default - 20%, prio 8
> 
> Also, a question being asked earlier by Geert of which i'm interested to
> find out.
> What is the effect of setting priority? What is the difference if i set prio
> 3 and prio 4? Does it mean:
> 1.    All prio 3 traffic sent out first, then followed by prio 4 traffic.
yes

> 2.    Amount of traffic sent out being weighted according to priorities.
> I.e. more prio 3 packets sent out than prio 4 in the same timeline.
no, use the parameter weitht for that ;-)

Staf
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<html><head> <title> Staf's HTML files </title> </head>  <body>

<ol>
<h1><li><a name=setup>Setup</li></h1>
I'm going to try to monitor the outgoing traffic.  For this, I use firewall chains.  Each chain contains the traffic I wanna control and i wanna monitor.  By reading the byte counters of these chains and dividing them by the elapsed times, I have the bandwidth of the data thar flows through that chain.
<p>I've also some tools to generate the traffic that fits in a chain and to monitor the bandwidth.  I use the destination port to divide the traffic.

<h1><li><a name=results>Results</li></h1>
<h3>testA1</h3>
<pre>10:0 100%               TOT 10mbit, 200kbps
 \--  20:10 50%         1   100 kbps
 \--  20:20 25%         2   50 kbps
 \--  20:30 25%         3   50 kbps
</pre>
<u>Results</u>
<br>traffic in all classes : 50% 25% 25% = OK
<br>no traffic in 20:30 : 66% = OK

<h3>testA2</h3>
<pre>10:0 100%                 TOT 10mbit, 200kbps
 \--  20:10 50%           1   100 kbps
 \--  20:20 50%           1   100 kbps
       \--  30:10 25%     2   50 kbps
       \--  30:20 25%     3   50 kbps
</pre>
<u>Results</u>
<br>traffic in all classes : 50% 25% 25% = OK
<br>no traffic in 20:10 : 50% 50% = OK
<br>no traffic in 30:20 : 50% 50% = OK

<h3>testA3</h3>
<pre>10:0 100%                 TOT 10mbit, 200kbps
 \--  20:10 50%           1   100 kbps
 \--  20:20 50%           1   100 kbps BOUNDED
       \--  30:10 25%     2   50 kbps
       \--  30:20 25%     3   50 kbps
</pre>
<u>Results</u>
<br>traffic in all classes : 50% 25% 25% = OK
<br>no traffic in 20:10 : 50% 50% = OK WITH TOT SPEED = 100 kbps
<br>no traffic in 30:20 : 50% 50% = OK WITH TOT SPEED = 100 kbps

<h3>testB1</h3>
I'v done some tests with the rate and the weigth parameter.  It seems that when you provide no weigth paramter, you get the same results as when you should provide a weigth paramtere proporitonal to the rate.

<h3>testB2</h3>
<pre><u>RATE1  RATE2  RATE1/RATE_TOT </u>
20     20     50.0  50.0  OK (first number : theoretical, second : restults from tests)
20     30     40.0  40.0  OK
20     40     33.3  33.3  OK
20     50     28.6  28.6  OK
20     60     25.0  25.0  OK

20     70     22.2  24.4  NOK
20     80     20.0  23.2  NOK
20     90     18.2  22.9  NOK
20     100    16.7  22.6  NOK
20     110    15.4  21.7  NOK
20     120    14.3  20.1  NOK
20     130    13.3  15.2  NOK
20     140    12.5  13.6  NOK
20     150    11.8  13.4  NOK
</pre>
OK if theoratical = results.

<h3>testB2</h3>
<pre>RATE1 = RATE2 = 100 
<u>WEIGTH1 WEIGTH2</u>
10      10      50.0
15      10      60.0
20      10      61.8
25      10      62.8
30      10      64.3
</pre>
Changing the weigth doesn't change a lot.

<h1><li><a name=tools>Tools</li></h1>
<a href="tests/"><b>Here</b></a> you can find my test-directory.  It contains all the programs and scripts that I'm using to test QOS.  To help you, I will explain some of the tools and scripts.

<p>
<b>tcpblast</b> : I found this little program in the contrib area of <a href="http://www.ee.ethz.ch/stats/mrtg/">MRTG</a> (Multi Router Traffic Grapher).
<pre># ./tcpblast --help
 
 usage: ./tcpblast [options] destination nblocks
  
  tcpblast/udpblast is a simple tool for probing network and estimating its
  throughoutput. It sends nblocks of 1024 B blocks of data to specified
  destination host
</pre>
I'm using this program to generate the traffic and not to measure the bandwidth.

<p><b>time_ms.exe</b> : 
This is a little program that gives the time in seconds and microseconds.  I've lost the source, but when i find it back, I will put it also here.  I'm using it in the following perl-script.

<p><b>monitor.pl</b> : 
This is a self-written perl script to monitor the bandwidth.  The idea behind it is simple.  Ipchains has a byte counter for each chains.  When you divide the byte counter by the elapsed time, you have the bandwidth for that particulary chain.
<p>For a better explanation, read the source.  It's a script.  It's my first one, so don't shoot me if I made a mistake.

<p>Output of monitor.pl :
<pre>
<font color=red>###############</font><font color=green>#######</font><font color=blue>######</font> 62 KB/s 31 KB/s 26 KB/s  T 120 KB/s 51.98%  26.03%  51.21% 21.85%
<font color=red>############</font><font color=green>##########</font><font color=blue>######</font> 50 KB/s 38 KB/s 26 KB/s  T 115 KB/s 43.32%  33.42%  50.24% 23.27%
<font color=red>############</font><font color=green>#########</font><font color=blue>#######</font> 50 KB/s 39 KB/s 29 KB/s  T 120 KB/s 42.05%  33.03%  49.31% 24.38%
<font color=red>############</font><font color=green>#########</font><font color=blue>#######</font> SP1     SP2     SP3      T SP3      PR1     PR2     PR3    PR4
</pre>
<u>Explanation</u> : 
<br>SP1 : Bandwidth of first chain
<br>SP2 : Bandwidth of second chain
<br>SP3 : Bandwidth of thirth chain
<br>SP4 : Total Bandwidth = SP1 + SP2 + SP3
<br>PR1 : SP1 / SP4
<br>PR2 : SP2 / SP4
<br>PR3 : total SP1 / total SP4
<br>PR4 : total SP2 / total SP4

<p><b>bbchains*</b> : these are the scripts that set up the firewall chains and the QOS commands.


</ol>

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