Re[2]: [LARTC] CBQ Traffic control not working

Re[2]: [LARTC] CBQ Traffic control not working

[Mugur TOMITA]

Stef Coene, thank you for your feed-back. I have already read
docum.org... The tests proved a difference of max 20Kbps between
theory and real life for cbq.
In my case practically nobody is limited...
In my scripts there are classes with prio 8... you say max is 7...
could this be the problem?
Could it be possible that on hard traffic cbq to just let pass
packets? This is a stupid question I guess...
Do I have a chance solving the problem by swtching to HTB?

This is what MRTG says about one of my 14.4Kbps clients :-)
Max  In 234.4 kb/s (2.3%)   Average  In 76.0 kb/s (0.8%)   Current  In 872.0 b/s (0.0%)

Any opinion on 'Traffic Shaper'? I'm considering changing the shaping
tool...

MT



On Wednesday 12 March 2003 16:49, Mugur TOMITA wrote:
> Hi everybody,
>
> I'm new to this list, so I appologize if a similar case has been covered
> already... I have the configuration attached below...
> The problem is that my traffic control doesn't work at all...
> Clients from any of the private networks manage to download even with
> 256Kbits from the Internet...
> The case is stranger because if I reboot the linux box, for a few minutes
> the traffic shapping seems to work... I mean from a machine in subnet
> 192.168.1.8/29 I download with 16-20Kbits... but not always (most often I
> get at least 128Kbps).
>
> A second question would be who has a higher priority:
> a PC from a prio 8 class filtered by a prio 3 filter, or
> a PC from a prio 3 class filtered by a prio 8 filter?
Prio for filters is used to order the filters.  Filters with lower prio are 
checked first.  Prio for a class is something else.  A class with a lower 
prio is allowed to send data first before the other classes.
And prio 7 is the biggest prio you can specify.

I found no errors in your tc rules.  
If you want more info about cbq (tests/docs/scripts/tips/faq/...) you can go 
to http://docum.org.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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Re: Re[2]: [LARTC] CBQ Traffic control not working

[Stef Coene]

On Wednesday 12 March 2003 22:28, Mugur TOMITA wrote:
> Stef Coene, thank you for your feed-back. I have already read
> docum.org... The tests proved a difference of max 20Kbps between
> theory and real life for cbq.
That's because cbq has to guess the conditions on the link and it uses some 
averages.  Like packet size.

> In my case practically nobody is limited...
> In my scripts there are classes with prio 8... you say max is 7...
> could this be the problem?
No.  If you do 
tc -s -d class show dev eth0 
you propably see prio 7 for the prio 8 classes.

> Could it be possible that on hard traffic cbq to just let pass
> packets? This is a stupid question I guess...
> Do I have a chance solving the problem by swtching to HTB?
Yes and no :)
htb is easier to understand/implement, there are no obscure options.  But if 
your problem is setup related, reimplementing the rules in htb can create the 
same problem.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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