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Posted by Keul on June 25, 2007, 8:41 am
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On Jun 25, 12:56 am, B...@hotmail.co.uk wrote:
>
> > Keul wrote:
> > > Does someone know if there's a way to send ethernet packet with bad
> > > CRC, with a fiber optic card?
> > > And if it is also possible to count them on a fiber optic card?
> > > it seems that "ethtool -S eth0" can displays statistics including bad
> > > CRC packet count, but i don't know if it is possible with all fiber
> > > optic cards.
>
> > Many likely can count them, but not generate them. As far as I know,
> > there are some cards specifically designed for use in testing that
> > have extra abilities, and probably an extra large price tag.
>
> > I don't know any specific model numbers, though.
>
> Smartbits tester will do it, here is an arbitrary card
> that says it does bad crc generation.
>
> http://www.toyo-spirent.com/smartbits/pdf/gx1421a.pdf
> "CRC error generation capability."
>
> Not at all cheap.
Thanks for the link but I think i will try to use a cheaper way (a
RJ45 ethernet product that can make crc error packets with a fiber
converter.)
(baybe I will arrive to disable the CRC filter of the converter...)
So do you know witch fiber card and network (gigabit) card could count
crc errors?
For my fiber card :
>ethtool -S eth2
no stats available
:(
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