Re: [LARTC] How HTB treats priorities?

[Stef Coene <stef.coene@docum.org>]

On Thursday 02 January 2003 19:03, ISC Robert Krycza³o wrote:
> Hi there,
>
> >> > Lets assume all classes try to send at their maximum speed trying to
> >>
> >> saturate the link. According to what you have written class D will
> >> get 64kbit/s, class E 128kbit/s and class F will get 32kbit/s. The
> >> sum is 224kbit/s if I am correct. Am I right?
> >> Yes.  So the rate of the parent B must also be at least 224kbit/s.
> >> And not 8kbis/s like you wrote before.
> >>
> >> > I dont want it to happen since customers have paid for 128kbit/s
> >>
> >> with guaranteed rato of 8kbit/s. Is there a way to acomplish my
> >> task???. Can it be done using HTB only?
> >> Yes, make the sum of D,E and F = 128kbit/s.
> >
> > 	This is the same kind of setup I've been shooting for. When you say the
> > sum of D, E and F, are you talking rate or ceil? I would imagine ceil.
> > That makes it hard to please the customer who is paying for 128kbit, yet
> > only sees it in 3 42kbit streams, or some other breakdown of the 128k.
> > If I understand you right, there is no way to run three seperate
> > children for prioritizing packets, and still give full bandwidth of
> > parent to any of the three, without allowing the use of all three at the
> > same time to exceed the parent?
>
> Yes, I am talking about ceil.
I was talking about the rate.  The ceil must be 128kbit/s so they can borrow 
up to 128kbit/s.  
> And the problem is that (and you as well) I
> want 128kbit/s go to class E in case D and F are idle. There must be a way
> to set this up, but for now I don't know how. If neither ceiling nor rate
> of parent class is respected, what are parents in htb for. Flat structure
> would be enough. I would like to receive more feedback on this.
That's no problem IF you follow some basic rules.  You can find them on 
www.docum.org on the faq page.  You have to see the ceil as a maximum of the 
class.  And the rate as a minimum bandwidth and a "divider".  

The other problem is the parent rate and ceil.  I did some test and I have 
strange results.  I still have to find a way to find out how you can 
configure the parent rate and ceil to get a good setup.

Stef

-- 

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

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