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    RE: iscsi : OpParmreset



    
    OpParmReset is the only way we have now to rest a negotiation in FFP
    (public or vendor specific).
    The restriction about R2T is related to a deadlock that can result when you
    change from no to yes.
    
    Julo
    
    
                                                                                                 
                        "BURBRIDGE,MATTH                                                         
                        EW                     To:     Julian Satran/Haifa/IBM@IBMIL,            
                        (HP-UnitedKingdo        ips@ece.cmu.edu                                  
                        m,ex2)"                cc:                                               
                        <matthew_burbrid       Subject:     RE: iscsi : OpParmreset              
                        ge@hp.com>                                                               
                        Sent by:                                                                 
                        owner-ips@ece.cm                                                         
                        u.edu                                                                    
                                                                                                 
                                                                                                 
                        24-09-01 13:36                                                           
                        Please respond                                                           
                        to                                                                       
                        "BURBRIDGE,MATTH                                                         
                        EW                                                                       
                        (HP-UnitedKingdo                                                         
                        m,ex2)"                                                                  
                                                                                                 
                                                                                                 
    
    
    
    Is OpParmReset still needed now that there is no operational parameter
    negotiation until after the security phase?  Why would both sides
    negoitiate
    a set of parameters only for one side to reset.  Surely if one side during
    login is not happy then it should close the connection.  In FFP, as there
    is
    no way to re-negotiate (after the OpParmReset) again if one side is not
    happy then should it not close the connection and start a new one.
    
    Also if in FFP, if OpParmReset is sent then does it just reset those
    parameters that can be negoiated during FFP and not those restricted to the
    login phase?  If so would it be easier to negotiate those parameters using
    the explicit name (e.g. InitialR2T) and remove the restriction of (example)
    "Once set to no, it can not be set back to yes" - as this is what using
    OpParmReset permits.
    
    Matthew
    
    -----Original Message-----
    From: Julian Satran [mailto:Julian_Satran@il.ibm.com]
    Sent: Friday, September 21, 2001 4:34 PM
    To: ips@ece.cmu.edu
    Subject: Re: iscsi : OpParmreset
    
    
    
    Santosh,
    
    The main purpose of this key was to explicitly cancel the effects of a
    running negotiation and restart anew.
    As the draft stands now there is no much difference between the two - but
    on basic principles the purposes are different (as you well stated).  We
    may change the value to be:
    
    OpParmReset=<default|current>
    
    to accommodate both semantics.
    
    Julo
    
    
    
    
                        Santosh Rao
    
                        <santoshr@cup.       To:     IPS Reflector
    <ips@ece.cmu.edu>
                        hp.com>              cc:
    
                        Sent by:             Subject:     iscsi : OpParmreset
    
                        owner-ips@ece.
    
                        cmu.edu
    
    
    
    
    
                        20-09-01 22:19
    
                        Please respond
    
                        to Santosh Rao
    
    
    
    
    
    
    
    
    
    All,
    
    Please refer the definition of OpParmReset login key.
    
    " 30 OpParmReset
    
    OpParmReset enables an Initiator or Target to request the operational
    parameters to be reset to the values they had before the negotiation."
    
    I suggest that the definition be re-worded to state that the OpParmReset
    enables an initiator or target to reset the operational parameters to
    their DEFAULT VALUES. [instead of the current definition that states
    that the parameters are reset to the values they had prior to the
    current negotiation.]
    
    The current definition requires the initiator to maintain 2 sets of
    operational parameter values, the current and the previous. In the case
    where initiator is just booting up, if the target sets OpParmReset to
    "yes", the initiator does not know what to set the op params to, since
    it has lost its prior state information.
    
    Comments ?
    
    Thanks,
    Santosh
    
     - santoshr.vcf
    
    
    
    
    
    
    
    


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Last updated: Wed Sep 26 22:17:23 2001
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