From: Petr Lapukhov (petrsoft@gmail.com)
Date: Sun May 21 2006 - 01:44:29 ART
Victor,
AFAIK, that "shape peak" stuff is just a convenient way to write down your
SP's policy.
Actually, it shapes your traffic up to "targer rate" with CIR1=CIR*(1+Be/Bc)
*constantly*. That is, it's almost the same as setting "shape average" with
CIR1, Bc1=Bc+Be, Be1=0.
The only convenience is that you may clearly write down what rate is
"guaranteed" by your SP (average), and what is the maximum possible
"oversubscription" rate (target rate).
That is, you send up to "peak" rate any time, but your SP only guarantees
delivery of "average" packet rate. It's up to you to live with that policy
:)
Also, you may use adaptive shaping to react to congestion.
HTH
Petr
2006/5/21, Victor Cappuccio <cvictor@protokolgroup.com>:
>
> Hola a todos.
>
>
>
> Guys
>
>
>
> I know this had been discussed before, and that QoS Gurus in this list
> like
> Chris Lewis had responded the difference between shape average and shape
> peak.
>
>
>
> But what if we look at 1 hour of shape average and 1 hour shape peak
> (Sorry
> I do not have a proper lab to test this using MRTG) for a particular flow,
> What will be in the difference when we send traffic using peak and then
> sending the traffic but now using average?.
>
>
>
> I know that BE+BC are only sent at the First Time Interval using shape
> average and with the use of shape peak we can send BC+BE every TC (off
> course if we have the tokens in the bucket). But my question is,. .. -
> Should I send more traffic using Peak Parameter in the Shape command
> then??
>
>
>
> Imagine only one flow of HTTP Traffic (steady and constant) going out the
> interface and then we apply shape average for 1 hour, and then apply shape
> peak for other hour, how could this be showed in the MRTG Graff?
>
>
>
> How could the wording (besides using the average or peak) could be
> elaborated for both scenarios?
>
>
>
> Thanks in Advance and sorry for my bad English
>
> Victor.
>
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