Re: CRC vs CHKSUM presentation slides

[Mark Bakke <mbakke@cisco.com>]

Vicente-

I just took another look through your slides after seeing the
presentation on Monday.  They were very well-done.  I have
one question, though.  If the CCITT-CRC32 is considered "good
enough", then would the Ethernet CRC32 also be good enough?  The
reason I ask is that every hardware vendor involved in building
iSCSI stuff already has implementations of the Ethernet CRC, 
which is used for both Ethernet and Fibre Channel.

The Ethernet poly has more terms than CCITT, and perhaps is
not as good as CRC-32C (any thoughts?), but everyone has hardware
and software for this, with proven interoperability (bit and
byte order, etc).  Performance-wise, it will be there for
10Gb Ethernet, so it should be fast enough.

So if the Ethernet poly is deemed good enough (even if it's not
the best), and fast enough (even if it's not the fastest), why
not use it?  I think we would stand a much better chance of
achieving interoperability in a short time.

Please let me know what you think of this; I realize that a few
of my questions were speculative.

Regards,

Mark

"CAVANNA,VICENTE V (A-Roseville,ex1)" wrote:
> 
> Here are the slides I presented at the IETF-50 in Minneapolis.
> 
> Vicente Cavanna
> Agilent Technologies
> 
>  <<CRCorChksm.pdf>>
> 
>   ----------------------------------------------------------------------------------------------------
>                      Name: CRCorChksm.pdf
>    CRCorChksm.pdf    Type: Portable Document Format (application/pdf)
>                  Encoding: base64

-- 
Mark A. Bakke
Cisco Systems
mbakke@cisco.com
763.398.1054