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    RE: Re : iscsi: Flavours of Login



    Thanks for the clarification Santosh
    
    Matthew
    
    -----Original Message-----
    From: Santosh Rao [mailto:santoshr@cup.hp.com]
    Sent: Wednesday, September 12, 2001 6:06 PM
    To: IPS Reflector
    Subject: Re : iscsi: Flavours of Login
    
    
    > Matthew,
    >
    > Some comments inline within the table.
    
    > Regards,
    > Santosh
    >
    > "BURBRIDGE,MATTHEW (HP-UnitedKingdom,ex2)" wrote:
    >
    > >
    > > Flavours of Login:
    > >
    +-------+-------+-------+---+-------------------------------------------+
    > > | TSID  | ISID  | CID   | X | Description
    |
    > >
    +-------+-------+-------+---+-------------------------------------------+
    > > |   0   | New   | New   | 0 | Initiator is creating a new session.
    |
    > >
    +-------+-------+-------+---+-------------------------------------------+
    >
    > Agreed. (Note that in this case, the CID is really a don't care, since CID
    is
    > always new when a login on a new ISID is received.)
    >
    > > |   0   | Exist | New   | 0 | Initiator is trying to login after reboot
    |
    > >
    +-------+-------+-------+---+-------------------------------------------+
    >
    > The first qualifier of a login should be the (ISID, TSID). If a session
    exists
    > for the given (initiator name + ISID) pair and TSID is set to 0, then, the
    > target MUST consider this login as an implicit logout of the previous
    session
    > and then a re-login. In this case, the CID or X bit must be a "don't
    care".
    > (?).
    >
    > > | Exist | Exist | New   | 0 | Initiator is adding a new connection to
    |
    > > |       |       |       |   | an existing session.
    |
    > >
    +-------+-------+-------+---+-------------------------------------------+
    >
    > Agreed.
    >
    > > | Exist | Exist | Exist | 1 | Initiator is attempted connection
    |
    > > |       |       |       |   | reinstatement
    |
    >
    > Agreed.
    >
    > >
    +-------+-------+-------+---+-------------------------------------------+
    > > | Exist | Exist | New   | 1 | Initiator is attempting session recovery
    |
    > > |       |       |       |   | (Proposal A)
    |
    >
    
    > The above is an invalid login PDU. An existing (ISID, TSID) login MUST
    either
    > use :
    > a) an existing CID with the X bit set
    > b) or, a new CID while adding a cxn to a session.
    >
    > >
    +-------+-------+-------+---+-------------------------------------------+
    > > |   0   | Exist | New   | 1 | Initiator is attempting session recovery
    |
    > > |       |       |       |   | (Proposal B)
    |
    > >
    +-------+-------+-------+---+-------------------------------------------+
    >
    > As stated earlier, for a given (initiator name + ISID), if the TSID is 0,
    the
    > login is an implicit logout + re-login if a previous session exists, for
    that
    > (initiator name + ISID). In this case, the CID and X_bit are "don't
    cares".
    


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Last updated: Wed Sep 12 15:17:04 2001
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