Re: [LARTC] cbq (root class) rate problem]

Re: [LARTC] cbq (root class) rate problem]

[Leandro Stasi]

Stef Coene wrote:

 >>I did a workaround by creating an extra class with root class as parent
 >>and isolated,bounded
 >>
 >>
 >>But I don't like to have extra classes just becuse I can control root
 >>class.
 >>
 >>tc qdisc  add dev eth0 root handle 10:0 cbq bandwidth 10mbit avpkt 1000
 >>cell 8
 >>
 >>tc class  add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 10mbit
 >>rate 50kbit allot 1514 cell 8 maxburst 20 avpkt 1000 isolated bounded
 >>
 >>tc class  add dev eth0 parent 10:1 classid 10:10 cbq bandwidth 10mbit
 >>rate 25kbit allot 1514 cell 8 maxburst 20 avpkt 1000 sharing borrow
 >>
 >>tc class  add dev eth0 parent 10:1 classid 10:11 cbq bandwidth 10mbit
 >>rate 25kbitallot 1514 cell 8 maxburst 20 avpkt 1000 sharing borrow
 >>
 > This is the way you should do it.  That extra class is no problem. 
You can
 > remove the sharing and borrow parameter if you want.  They are on by 
default.
 >
 > Also provide a weight parameter (I take weight = rate/2) and attach the
 > filters to the root qdisc and point them direclty to the end class.
 >
 > Stef
 >
 >



It is useless to attach a qdisc (like sfq) to the extra class?

What is the difference between attaching the filter to the root qdisc or
to the leaf classes?




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Re: [LARTC] cbq (root class) rate problem]

[Stef Coene]

>  > Also provide a weight parameter (I take weight = rate/2) and attach the
>  > filters to the root qdisc and point them direclty to the end class.
>  >
>  > Stef
>
> It is useless to attach a qdisc (like sfq) to the extra class?
No.  Default, the classes uses a PRIO qdisc (or FIFO, I'm not sure) to send 
the data.  And you can replace it with SFQ.

> What is the difference between attaching the filter to the root qdisc or
> to the leaf classes?
If tried it a few times.  And the result was that I had to supply the weight 
parameter and uses filters attached to the root qdisc to get the results like 
I wanted.

Stef

-- 

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