Re: new iSCSI PDU outline

[Matt Wakeley <matt_wakeley@agilent.com>]

Mike,

If an iSCSI implementation is put together, without using routers or other
middle boxes that muck with the TCP checksum, then the TCP checksum should be
adequate.  The first implementations of iSCSI are going to be software based. 
In these early software based implementations, performance could probably be
increased if CRC was disabled.

-Matt


Michael Krause wrote:
> 
> At 06:37 PM 1/27/2001 +0200, julian_satran@il.ibm.com wrote:
> 
> >Doug,
> >
> >CRC is not mandatory.  If you are using a local net (real time) on a
> >reliable media you probably don't need anything.
> 
> Unclear how iSCSI will be able to determine whether the target is local or
> not given IP subnets can already span large geographic distances and the
> movement to 10 GbE translates to large Ethernet fabrics.  Also as
> transparent fail-over is delivered by multiple vendors, what started out as
> local may become remote in some way.
> 
> I strongly disagree with making CRC protection optional and I suspect
> customers will given the various studies on error rate escapes associated
> with TCP checksum already discussed on this reflector.
> 
> Mike