Message-ID: <277DD60FB639D511AC0400B0D068B71E0564C706@corpmx14.us.dg.com>
From: Black_David@emc.com
To: esha@procsys.com, ips@ece.cmu.edu
Subject: RE: need info regarding checksum algorithm
Date: Wed, 8 Jan 2003 11:53:52 -0500 
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Esha,

That's a confused question, as nothing comes before SOF (S = Start).
The answer to the question I think you intended to ask is that
Fibre Channel uses a standard CRC for each frame, and of course
it's documented in the relevant Fibre Channel standards.
See T11's web site (www.t11.org) for more.

Thanks,
----------------------------------------------------
David L. Black, Senior Technologist
EMC Corporation, 176 South St., Hopkinton, MA  01748
+1 (508) 293-7953 **NEW**     FAX: +1 (508) 293-7786
black_david@emc.com        Mobile: +1 (978) 394-7754
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> -----Original Message-----
> From: Eshanye.K.P [mailto:esha@procsys.com]
> Sent: Tuesday, January 07, 2003 11:41 PM
> To: owner-ips@ece.cmu.edu; ips@ece.cmu.edu
> Subject: need info regarding checksum algorithm
> 
> 
> Hello,
> 
> Need some information. FC data traffic contains the checksum 
> before SOF.
> Can anybody tell me which is the algorithm generally used by the FC
> world for this. Is it Fletcher Checksum - RFC 905 or Nakassis for
> optimized computation of checksum - RFC 1008.  Does any standard (like
> FC-FS or any scsi standard) talk about this ?
> 
> Regards
> Esha
>