RE: iSCSI: ImmediateData negotiation

[kevin_lemay@agilent.com]

Actually, both are incorrect. It is illegal to negotiate a parameter more
than once during a login. The correct sequence is:

I->T: ImmediateData=Yes
T->I: ImmediateData=No

Both initiator and target must send ImmediateData=Yes for immediate data to
be used.

Kevin Lemay

-----Original Message-----
From: Dennis Young [mailto:dyoung@rhapsodynetworks.com]
Sent: Wednesday, May 08, 2002 11:02 AM
To: ips@ece.cmu.edu
Subject: iSCSI: ImmediateData negotiation


I have a question on how a target should respond to
"ImmediateData=Yes" from an initiator if the target
doesn't support ImmediateData.  Here are two scenarios:

Scenario 1:
/* The target here only considers the value offered by the
 * initiator, if the value is not acceptable, it simply 
 * rejects it rather than suggesting another value.
 */
I->T: ImmediateData=Yes
T->I: ImmediateData=Reject
I->T: ImmediateData=No  /* Should initiator offer No? */
T->I: ImmediateData=No

Scenario 2:
/* The target here simply returns a value it supports 
 * without rejecting the value offered by the initiator.
 */
I->T: ImmediateData=Yes
T->I: ImmediateData=No
I->T: ImmediateData=No  /* Should initiator reply No? */
T->I: ImmediateData=No

Based on section 4.2 of draft 12, I believe scenario 1 is correct, right?

In addition, does the Result function of a text parameter (AND or OR) make a
difference here?

Thanks,
Dennis