Re: iSCSI: current UNH Plugfest

["Julian Satran" <Julian_Satran@il.ibm.com>]

Bob,

Rereading the text I understand what is confusing. The target name 
mentioned is the one from the previous item!

I will reformulate it to read:

The value must be one of:

all

The initiator is requesting that information on all relevant targets known 
to the implementation be returned.  This value MUST be supported on a 
discovery session, and MAY NOT be supported on an operational session.

<iSCSI-target-name>

If an iSCSI target name is specified, the session should respond with 
addresses for only the named target, if possible.  This value MUST be 
supported on discovery sessions.  A discovery session MUST be capable of 
returning addresses for those targets that would have been returned had 
value=all been designated.

<nothing>

The session should respond with addresses only for the target to which the 
session is logged in.  This MUST be supported on operational sessions, and 
MAY NOT return targets other than the one to which the session is logged 
in.


Thanks,
Julo




"Robert D. Russell" <rdr@mars.iol.unh.edu>
01-11-01 18:31
Please respond to "Robert D. Russell"

 
        To:     Julian Satran/Haifa/IBM@IBMIL
        cc:     ips@ece.cmu.edu
        Subject:        Re: iSCSI: current UNH Plugfest

 

Julian:

Comments below:

> 4. Situation: The initiator and target have successfully completed the
>    login phase for a discovery session and are now in full feature 
phase.
>    The initiator sends a text command containing the single key:
>    "SendTargets=".  What response is expected from the target?
> 
> 
>    Interpretation 1:
> 
>    According to the explanation on page 188 of draft 8 (page 189 of
>    draft 8a):
>    "If no target name is specified, the session should respond with
>    addresses only for the target to which the session is logged in.
>    This MUST be supported on operational sessions, and MAY NOT
>    return targets other than the one to which the session is logged in."
> 
>    However, for a discovery session there is no target per se (the
>    initiator does not specify a TargetName= during login), so the
>    target therefore follows the rule on page 188 of draft 8 (page 189
>    of draft 8a):
> 
> +++
> That is not strictly correct. You may use discovery to determine the 
> addresses and portal groups for a specific target - i.e. you may give a 
> target-name. If you give a target name that is all you get. If don't 
give 
> a name you get all the targets you are allowed to get to.
> ++++

If I understand this reply correctly, you are saying that
in a discovery session, when the initiator sends:
   SendTargets=
it should expect to receive all the targets it is allowed to get to.
Correct?


This leads to 2 further questions/points:

1. Is this response any different from the response the initiator will
get when it sends:
   SendTargets=all

2. If these responses are the same, then the explanation of <nothing>
on page 188 of draft 8 should be changed to indicate that this is what
happens for a discovery session.

Thanks,

Bob Russell
InterOperability Lab
University of New Hampshire
rdr@iol.unh.edu
603-862-3774