[LARTC] QOS HELP PLEASE

[LARTC] QOS HELP PLEASE

[Dariusz Dwornikowski]

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ive got problems with my network (120 people) 
ive got big pings (300ms)m whereas there are normally about 19ms. 
i do not know if my qos is proper (fast i mean).

www.tdi.pozman.pl/fir2 - my qos
www.tdi.pozman.pl/rules - my firewall


can sb tell me if do it ok ? 


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Re: [LARTC] QOS HELP PLEASE

[Martin A. Brown]

Greetings Dariusz,

 : ive got problems with my network (120 people) 
 : ive got big pings (300ms)m whereas there are normally about 19ms. 
 : i do not know if my qos is proper (fast i mean).
 : 
 : www.tdi.pozman.pl/fir2 - my qos
 : www.tdi.pozman.pl/rules - my firewall

After examining 'fir2', which shows an HTB class structure listed below, I 
think you don't quite understand the guarantees and the borrowing model of 
HTB.


      your Internet bound traffic (1:2) -- - - - -->   rate     ceil
                           |
    +--------+--------+--------+--------+-------+
1:N |             1:7 |    1:6 |    1:5 |   1:4 |
    | [ lots of       |        |        |       +--> 128kbit   256kbit
    |   classes       |        |        +-- - - - -> 128kbit   256kbit
    |    here ]       |        +- - - - - - - - - -> 128kbit   256kbit
    |                 +-- - - - - - - - - - - - - -> 128kbit   256kbit
    |                                                  ...       ...
    +-- - - - - - - - - - - - - - - - - - - - - - -> 128kbit   256kbit

In your case, N\x163 (although I didn't check that every class was 
created with the same rate/bandwidth).  The problem you are having is that 
the borrowing (and hence, shaping) model never gets a chance to go into 
effect.

Every leaf class (1:4 through 1:166) is guaranteed 128kbit.  Your QoS 
setup is actually not helping you at all!  It's configured to guarantee 
around 19mbit (128kbit * 163 guarantees).

Given your available Internet bandwidth, it should work out a bit better 
for you if you slim down the total number of classes and lump a few 
handfuls of users in each class with an embedded SFQ.  You may find that 
Stef's rules for HTB shaping are quite handy [0], and also my HTB 
description [1].

Good luck,

-Martin

 [0] http://www.docum.org/docum.org/faq/cache/10.html
 [1] http://tldp.org/HOWTO/Traffic-Control-HOWTO/classful-qdiscs.html#qc-htb

-- 
Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com

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Re: [LARTC] QOS HELP PLEASE

[Dariusz Dwornikowski]

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so the sun of all rates of speeds of classes for the clients should be less than the rate of the class 1:2 ?
or i understand it badly ?




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Re: [LARTC] QOS HELP PLEASE

[Martin A. Brown]

Dariusz,

 : so the sum of all rates of speeds of classes for the clients should be 
 : less than the rate of the class 1:2 ? or i understand it badly ?

Indeed, you understand correctly.  Your client classes are leaf classes.

  - An HTB leaf class guarantees <rate> access.
  - Above <rate>, the leaf class will borrow (from parents) up to <ceil>.

This bears repetition:  the guaranteed total of bandwidth, before HTB 
shaping and borrowing begins, is the sum of the rates of the leaf classes.

  - If you want to make sure that the borrowing and shaping works 
    correctly, be certain to configure HTB so that the leaf (and child) 
    classes can never send more traffic than the parent has in <ceil>.
  - For best results, configure HTB so that the leaf (and child) classes
    can never send more traffic than the parent has in <rate>.

Good luck,

-Martin

-- 
Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com

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Re: [LARTC] QOS HELP PLEASE

[Jonathan Day]

--- "Martin A. Brown" <mabrown-lartc@securepipe.com>
wrote:

> 
> Dariusz,
> 
>  : so the sum of all rates of speeds of classes for
> the clients should be 
>  : less than the rate of the class 1:2 ? or i
> understand it badly ?
> 
> Indeed, you understand correctly.  Your client
> classes are leaf classes.
> 
>   - An HTB leaf class guarantees <rate> access.
>   - Above <rate>, the leaf class will borrow (from
> parents) up to <ceil>.
> 
> This bears repetition:  the guaranteed total of
> bandwidth, before HTB 
> shaping and borrowing begins, is the sum of the
> rates of the leaf classes.

(snip)

Can it ever be truly equal? There is going to be some
overhead in having the multiple layers, so although
the sum of the rates at level N can never exceed the
rate of the parent layer at N-1, the penalties must
mean that it must be marginally less (even if this is
so marginal as to be hard to detect).



		
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Re: [LARTC] QOS HELP PLEASE

[Dariusz Dwornikowski]

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ok i did the calculations and here it is : www.tdi.pozman.pl/fir3

now ping to world from server are superb but. ping to access points in the network are 1-2seconds...
people keep on calling and tlling that tranfers on parts of network are 1-3kb/s.

i hae to mention that on the old server all was perfect. 
please anyone :)


-- 
*Dariusz 'tdi' Dwornikowski | Gentoo | admin at pozman.pl     |
*[JID]:tdi@gentoo.pl|[gg]:2266034|[IRC]:#gentoo-pl@freenode   |
*[MAIL]:tdi@pozman.pl|[WWW]:www.tdi.pozman.pl                 | 
*Serwery,administracja,webapps - www.ProAdmin.com.pl          |
*Fingerprint:43E21CC46DAFD2F754E91547D59B39F56AAA4B5F         |

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Re: [LARTC] QOS HELP PLEASE

[Oscar Mechanic]

On Tue, 2005-07-12 at 19:47 +0200, Dariusz Dwornikowski wrote:
> ok i did the calculations and here it is : www.tdi.pozman.pl/fir3
> 
> now ping to world from server are superb but. ping to access points in the network are 1-2seconds...
> people keep on calling and tlling that tranfers on parts of network are 1-3kb/s.
> 
> i hae to mention that on the old server all was perfect. 
> please anyone :)
> 
> 
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> LARTC@mailman.ds9a.nl
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Anytime I have ever had this problem which was 4 times 2 weeks ago was
due to a loop in the network. I have no explanation for it and am
pulling my hair out. Some time rebooting AP works sometimes reboot a
switch works. Its not my network I am just trying to help someone fix
it.

Have not had the problem since I told the guy to pull all the cables out
and re cable the network. I would not of said this only your iptables
and tc looks like mine and the problem sounds so-similar. 

But this was the only post I could find from you.



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Re: [LARTC] QOS HELP PLEASE

[Andreas Klauer]

On Tuesday 12 July 2005 19:47, Dariusz Dwornikowski wrote:
> ok i did the calculations and here it is : www.tdi.pozman.pl/fir3

Is this URL valid? I get a 404.

Andreas
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