Dear all,
I''m new to traffic shapping although i have gone through marking
and HTB queueing but i felt trouble in tc filter . I wonder if any one give me
the hints about quantum or r2q.
i guess quantum is used when two class has same prio and rate and want to
give first priority between them and control the borrowing traffic. It should
be set more than MTU too. But my question is that how can we set quantum exactly
, i mean is there any calculation need to set this quantum parameter and its
effect to r2q . Any changes we have to do in r2q parameter.
Any suggestion will be apprieciated.
thanks in advance.
sujeet
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Hi,
I usually use this as a rule of thumb:
quantum = rate(in bytes)/r2q
Note that quantum should be > MTU (normally 1500).
Best regards,
Pau Oliva
---
http://pof.eslack.org/blog/
On Mon, December 12, 2005 7:32, sujeet mulmi said:> Dear all,
>
> I''m new to traffic shapping although i have gone through
marking
> and HTB queueing but i felt trouble in tc filter . I wonder if any
> one give me the hints about quantum or r2q.
> i guess quantum is used when two class has same prio and rate and want
> to give first priority between them and control the borrowing traffic.
> It should be set more than MTU too. But my question is that how can we
> set quantum exactly , i mean is there any calculation need to set this
> quantum parameter and its effect to r2q . Any changes we have to do in
> r2q parameter.
>
> Any suggestion will be apprieciated.
>
> thanks in advance.
>
> sujeet
This page explains the quantum & r2q values used in HTB in depth:
http://www.docum.org/docum.org/faq/cache/31.html
If you want to see my working example download this script:
http://pof.eslack.org/archives/files/bw-shaper1.2.sh
results achieved can be seen here:
http://pof.eslack.org/graphs/
...any commments appreciated ;)
Regards,
Pau Oliva
On Mon, December 12, 2005 12:09, sujeet mulmi said:> thanks pal.
>
> i got the clue but i get confused in rates whether it should be the
> total b/w or rate seperate for class id.
> can you give me some hints on r2q too.
>
> Pau Oliva - pof <pau@eslack.org> wrote:
> Hi,
>
> I usually use this as a rule of thumb:
>
> quantum = rate(in bytes)/r2q
>
> Note that quantum should be > MTU (normally 1500).
>
>
> Best regards,
>
> Pau Oliva
>
>
> ---
> http://pof.eslack.org/blog/
>
>
> On Mon, December 12, 2005 7:32, sujeet mulmi said:
>> Dear all,
>>
>> I''m new to traffic shapping although i have gone through
marking
>> and HTB queueing but i felt trouble in tc filter . I wonder if any
>> one give me the hints about quantum or r2q.
>> i guess quantum is used when two class has same prio and rate and want
>> to give first priority between them and control the borrowing traffic.
>> It should be set more than MTU too. But my question is that how can we
>> set quantum exactly , i mean is there any calculation need to set this
>> quantum parameter and its effect to r2q . Any changes we have to do in
>> r2q parameter.
>>
>> Any suggestion will be apprieciated.
>>
>> thanks in advance.
>>
>> sujeet