[LARTC] ADSL overhead patch (was: Qos with 2 internet connections problems)

[Jesper Dangaard Brouer]

On Wed, 6 Apr 2005, Andy Furniss wrote:

> Jason Boxman wrote:
>> On Tuesday 05 April 2005 18:36, Francisco Pereira wrote:
>> <snip>
>> 
>>> I would recommend reading the masters thesis of Jesper Dangaard Brouer
>>> at http://www.adsl-optimizer.dk/thesis/
>>> Altough he didnt release software yet (there is some code & patches in
>>> the pdf file) which could lead to the best solution, you could estimate
>>> the adsl overhead with real knowledge, and not like it says in some
>>> scripts (put x kbit less than the link bandwith, or 5% less,...)
>> 
>> 
>> I have been eagerly awaiting the release of that software myself.
(see my other excuse mail... ;-)


> I am testing a version at the moment based on Ed Wildgoose's - if that didn't 
> work for you though, I can't see why this one should.

Hmm, I just googled/looked at Ed Wildgoose's patch, and I is not 
correct/precise.  You can read why my patch is correct/precise in Section 
6.1.2 of the Thesis (which gives a description of the patch).


> Mine is for UK pppoatm but if you know your overheads it's easy to modify - 
> Do you? there are tables in the doc linked to.

In Chapter 5, I have tried to summarize the different types of 
encapsulation methods and their according overheads, for easy reference.

Is is still a problem figuring out, which type of encapsulation your 
specific ADSL connection is using...


Hilsen
   Jesper Brouer

--
-------------------------------------------------------------------
Research Assistant
Dept. of Computer Science, University of Copenhagen
E-mail: hawk at diku.dk, Direct Tel.: 353 21438
-------------------------------------------------------------------