Re: iSCSI Some Thoughts on Digests

["Jim Williams" <jimw@giganet.com>]

----- Original Message -----
From: <Black_David@emc.com>
To: <aboba@internaut.com>; <ips@ece.cmu.edu>
Sent: Friday, December 08, 2000 8:42 AM
Subject: RE: iSCSI Some Thoughts on Digests


> Bernard,
>
> > >Jim,I think your analysis is based on links only.  The problem that was
> to be
> > >solved was the problem of travel through Routers, Switches, and
Gateways.
> > >These are generally unprotected paths.  So there are, in general, no
CRC
> of
> > >any kind being applied to the data that is being passed from one port
to
> > >another.  The proposed Digest is mainly to protect against this
problem.

I agree with this assesment.  I think the analysis I did includes
this fact. (Except of course the mention of link CRC escapes which
would not apply.)  But the numbers should be the same if the starting
point is the rate of TCP checksum errors.