Should SIP require detection of duplicate tags?
jlw at hpbs1506.boi.hp.com
Sat Apr 16 11:40:14 PDT 1994
> How bit is enormous? SIP can have 15 initiators and up to 256 tags per
> initiator, for a total of 65,280 possible tags. Is this enormous enough?
I think your math is in error. 15 * 256 = 3840. :-)
I agree with your analysis of the issue. I did much of the work on
the queuing firmware for HP. We only found that the overlapped tags
occurred during the debug of driver code. I have been one who has
fought against checking of the tags once serial interfaces were
In regards to the SIP implementations, I think that the tag checking
can be optional here also. The checking really doesn't add to an
implementation. If a target disconnects from an initiator, then I
think there is time in f/w to do the checking. If the target is
automated in the data transfers and will send the data without a
disconnect, then the tag checking is totally useless since the
nexus information cannot be confused.
I guess what I am saying is that I would not expect h/w to do tag
checking. I'm guessing that's the "right" answer, Steve.
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