[LARTC] questions on CBQ

[LARTC] questions on CBQ

[James Ma]

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Hi, All,

When I use CBQ, what should I put for "avpkt"? I saw all the examples using 1000, but if I have a lot of voice packets which are very small, will "avpkt 1000" cause any problem? Another thing is, does CBQ support "default" as HTB does (ex: tc qdisc add dev eth0 root handle 1: htb default 12)? How can I put "all other traffic" into certain class?

Thanks,

James

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Re: [LARTC] questions on CBQ

[Stef Coene]

On Monday 09 December 2002 18:11, James Ma wrote:
> Hi, All,
>
> When I use CBQ, what should I put for "avpkt"? I saw all the examples using
> 1000, but if I have a lot of voice packets which are very small, will
> "avpkt 1000" cause any problem? 
I'm not sure, but avpkt is used in internal calculations so if you have a lot 
of small packets, a smaller value would be better.

> Another thing is, does CBQ support
> "default" as HTB does (ex: tc qdisc add dev eth0 root handle 1: htb default
> 12)? How can I put "all other traffic" into certain class?
Cbq has no default class.  You can use a u32 filter with src 0/0 as the last 
filter statement.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
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Re: [LARTC] questions on CBQ

[EGAL Vincent]

Stef Coene wrote:

>On Monday 09 December 2002 18:11, James Ma wrote:
>  
>
>>Hi, All,
>>
>>When I use CBQ, what should I put for "avpkt"? I saw all the examples using
>>1000, but if I have a lot of voice packets which are very small, will
>>"avpkt 1000" cause any problem? 
>>    
>>
>I'm not sure, but avpkt is used in internal calculations so if you have a lot 
>of small packets, a smaller value would be better.
>
avpkt is one of the parameters used to evaluate the maxidle parameter 
for a cbq class.
maxidle can be seen as the maximum credit that a class can reach when 
being underlimit for a period of time
So the higher maxidle is, the more packets in burst the class may send 
when switching  from underlimit to overlimit.

>
>  
>
>>Another thing is, does CBQ support
>>"default" as HTB does (ex: tc qdisc add dev eth0 root handle 1: htb default
>>12)? How can I put "all other traffic" into certain class?
>>    
>>
>Cbq has no default class.  You can use a u32 filter with src 0/0 as the last 
>filter statement.
>
>Stef
>
>  
>


-- 
Vincent EGAL
Email : egal@ipanematech.com


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