[LARTC] HFSC and that ATM overhead problem (Another VOIP QoS post. Ahhhh)

[Gustavo Homem]

On Sunday 04 November 2007 23:16, Fog_Watch wrote:
> On Sun, 4 Nov 2007 12:46:37 +0000
>
> Gustavo Homem <gustavo at angulosolido.pt> wrote:
> > I don't use Shorewall, but rather an iptables script which works for
> > most scenarios:
>
> No disrespect, but that sounds too scary for me.  I feel more
> comfortable if something like Shorewall is holding my hand.

Takes more time the first time and less time from then on.

>
> > That is, start with the value the modem is synchronized for, fill the
> > line with the average traffic you expect and lower the values until
> > is OK. As you lower the upstream value you will find increasingly
> > better latency values (try with ping + voip app).
>
> Thanks for the explanation.
>
> > doesn't scale for using across multiple systems of
> > different versions.
>
> I didn't understand that bit.  What are the "systems" and "versions"?
>

If you manage multiple Linux systems with different versions you realize that 
patching the kernels for all, and retesting afterwards, takes quite some 
time. Then if you need a kernel upgrade, there you go again praying that the 
patches work.

The point was: the gain obtained from using those patches might not compensate 
the time investment, on the scenarios I work with.

For a single setup, or multiple identical ones, it will pay off for sure.

Cheers
Gustavo

> Regards
>
> Fog_Watch.

-- 
Angulo Sólido - Tecnologias de Informação
http://angulosolido.pt