[LARTC] ADSL Calculator

[LARTC] ADSL Calculator

[Tobias Diedrich]

Hi,

I've written a small javascript ADSL throughput calculator:
http://nukunuku.yamamaya.is-a-geek.org/~ranma/adsl.html

Feel free to submit alternative presets (I currently have presets
for three german telecom speed variants: T-DSL (1000|2000|3000),
derived from
http://www2.lancom.de/kb.nsf/5d445c701b3ff52dc1256e7700297e5c/27c6ee1c3e3f74b0c1256e94004a433e?OpenDocument).

Comments, suggestions, spelling nitpicks?

-- 
Tobias						PGP: http://9ac7e0bc.uguu.de
_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc

Re: [LARTC] ADSL Calculator

[Andy Furniss]

Tobias Diedrich wrote:
> Hi,
> 
> I've written a small javascript ADSL throughput calculator:
> http://nukunuku.yamamaya.is-a-geek.org/~ranma/adsl.html
> 
> Feel free to submit alternative presets (I currently have presets
> for three german telecom speed variants: T-DSL (1000|2000|3000),
> derived from
> http://www2.lancom.de/kb.nsf/5d445c701b3ff52dc1256e7700297e5c/27c6ee1c3e3f74b0c1256e94004a433e?OpenDocument).
> 
> Comments, suggestions, spelling nitpicks?
> 

Looks good - one picky point - if your overhead means only 4 bytes 
padding at default mtu are needed, then reducing mtu to be "optimal" for 
IP and above levels may be less efficient from the point of view of the 
tcp data because of the reduced payload vs fixed overheads.

I haven't done the maths on that :-)

Andy.

_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc

Re: [LARTC] ADSL Calculator

[Andy Furniss]

Andy Furniss wrote:
> Tobias Diedrich wrote:
> 
>> Hi,
>>
>> I've written a small javascript ADSL throughput calculator:
>> http://nukunuku.yamamaya.is-a-geek.org/~ranma/adsl.html
>>
>> Feel free to submit alternative presets (I currently have presets
>> for three german telecom speed variants: T-DSL (1000|2000|3000),
>> derived from
>> http://www2.lancom.de/kb.nsf/5d445c701b3ff52dc1256e7700297e5c/27c6ee1c3e3f74b0c1256e94004a433e?OpenDocument). 
>>
>>
>> Comments, suggestions, spelling nitpicks?
>>
> 
> Looks good - one picky point - if your overhead means only 4 bytes 
> padding at default mtu are needed, then reducing mtu to be "optimal" for 
> IP and above levels may be less efficient from the point of view of the 
> tcp data because of the reduced payload vs fixed overheads.
> 
> I haven't done the maths on that :-)

Which I should have done first :-)

If timestamps are off it's still about 1 1/3 bytes per frame more 
efficient. If they are on (default on linux costing 12 bytes) the 
smaller mtu is about 1 byte per frame less efficient.

Andy.
_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc

Re: [LARTC] ADSL Calculator

[Per Marker Mortensen]

At Wed, 15 Jun 2005 00:02:32 +0200,
Tobias Diedrich wrote:

Hi

> Comments, suggestions, spelling nitpicks?

Maybe 

http://www.adsl-optimizer.dk/thesis/
http://www.adsl-optimizer.dk/thesis/main_final.ps

chapter 5, will give you extra information.

---
Yours

Per Marker Mortensen <per@markermortensen.dk>

_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc