[c-nsp] help with the correct choice of a cisco router

[Riccardo Giuntoli]

Ok thanks for your time and explanation.

Cheers.

On Mon, Mar 5, 2012 at 1:52 PM, Nick Hilliard <nick at foobar.org> wrote:

> On 05/03/2012 12:13, Riccardo Giuntoli wrote:
> > Do you have any particular recommendation and/or link to some tests that
> > you consider interesting?
>
> Unfortunately not.
>
> Just in case it isn't clear from my previous email, the test results they
> provide should be considered accurate in the context of the methodology
> they used.  I'm not suggesting for a moment that the results aren't
> repeatable and consequently an accurate portrayal of what they're testing.
>  The problem is that vendors often suggest subtle configuration tweaks
> which make a dramatic difference to the results.  E.g. two that come to
> mind are the EANTC c6500 10G test:
>
> >
> http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd800c958a.pdf
>
> In this case, the choice of port used by the tester turned out to be
> critical due to ASIC layout.
>
> Also, the Miercom N5K vs Arista 7124:
>
> > http://www.cisco.com/web/strategy/docs/finance/miercom_n5k_testrpt.pdf
>
> ... where it turned out that the entire test was designed in favour of the
> N5K, even down to the exact choice of packet size used in the testing
> configuration.
>
> What's important to understand about both of these tests are that they are
> completely repeatable and consequently completely accurate in terms of
> providing a result about the particular methodology used.  However, you
> cannot generalise the test results and say that in general a sup720 +
> ws-x6704-10ge handles 10G at line rate or that in general an Arista 7124
> drops packets all over the floor in situations where an N5k wouldn't.  This
> is because the tests are loaded.
>
> I haven't looked at the miercom ISR G2 tests and can't comment on them
> other than to say that I'm sure they're repeatable.  But as with all vendor
> tests, I remain sceptical about whether they provide a good overall view of
> the ISR G2 products.
>
> Nick
>



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Name: Riccardo Giuntoli
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