Re: Shape Peak, why did they come up with that?

Shape peak is referencing the concept of PIR. PIR in the MPLS world is used
to allow customers to burst above their CIR. Anything above CIR is
considered out of profile traffic and can be equated to BE traffic, or even
less than BE traffic if your BE has a minimum CIR.

So if I sell at circuit with a CIR of 1Mbps, and allow burst up to 2Mbps.
The CIR=1, and PIR = 2. If the network is not congested the burst is allowed
through. If congestion occurs, the difference is dropped.

It's been a while since I've done any QoS in Cisco land, but I believe this
concept is exactly the same.

On Mon, May 9, 2011 at 7:21 PM, Tom Kacprzynski <tom.kac_at_gmail.com> wrote:

> Hello,
> I'm somewhat confused by the shape peak. Basically the peak shaped rate
> you'll get is 2*CIR (as long as the Bc and Be is equal). So if you
> configure
> shape average you'll get the same things as long as you tune the CIR. To me
> it seems like the same thing but little bit more confusing.
>
> Can anyone please give me a good example where you would prefer to use
> shape
> peak over shape average?
>
> Thank you very much for you help.
>
> (We can learn the commands and know *how *to do it but what's they point if
> we don't know *why *we do it :)
>
> Tom
>
>
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Received on Thu May 12 2011 - 14:29:32 ART