[j-nsp] Re: M10 maximum throughput

[Zvezdelin Vladov]

You might want to take a look at these:
http://ipmon.sprint.com/packstat/viewresult.php?20:pktsz:rly-21.0-021121:

On 12/31/05, Daniel Roesen <dr at cluenet.de> wrote:
> On Sat, Dec 31, 2005 at 01:00:30PM -0200, Rubens Kuhl Jr. wrote:
> > A good description of the process is found at
> > http://juniper.cluepon.net/index.php/J-cell
> >
> > But I disagree with the wiki text on
> > http://juniper.cluepon.net/index.php/FPC_Bandwidth that states 3.2
> > Gbps as a realistic worst case, because not all packets will have
> > sizes that are multiple of 64 bytes, which is the only case that would
> > achieve the 3.2 Gbps maximum.
> > This reference (http://www.nlanr.net/NA/Learn/Gm/pktsizes.html) states
> > that 40 byte packets account for 40% of the packets flowing around; 40
> > byte packets require 16 byte paddings for each J-Cell, so if all other
> > packets would be 64 byte multiples, performance would already been
> > limited to 2.72 Gbps.
>
> Indeed. With some simple math (and knowing the architecture in detail)
> you can easily come up with the worst case IP packet size (and other
> properties) to stress the router the most. :-)
>
>
> Best regards,
> Daniel
>
> --
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