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    Re: iSCSI: resend of diagram from 2.5.1



    John,
         How's this look?
    
        ----------------------------IP Network---------------------
             |              |                       |
    +--------|--------------|-----------------------|---------------------+
    |        |              |                       |                     |
    |   +----|----+    +----|----+             +----|----+                |
    |   | Network |    | Network |             | Network |                |
    |   | Portal  |    | Portal  |             | Portal  |                |
    |   +---------+    +---------+             +---------+                |
    |        |              |                       |                     |
    | +------|--------------|-----------------------|-------------------+ |
    | | +----|--------------|------+    +-----------|-----------------+ | |
    | | |      Portal Group 1      |    |       Portal Group 2        | | |
    | | |                          |    |                             | | |
    | | |     SCSI Target Port     |    |       SCSI Target Port      | | |
    | | | (iSCSI Target Name +     |    | (iSCSI Target Name +        | | |
    | | | 't' + 1)                 |    | 't' + 2)                    | | |
    | | +--------------------------+    +-----------------------------+ | |
    | |                |                             |                  | |
    | | +----------------------------+  +-----------------------------+ | |
    | | |        iSCSI Session       |  |      iSCSI Session          | | |
    | | |                            |  |                             | | |
    | | | (iSCSI Initiator Name +    |  | (iSCSI Initiator Name +     | | |
    | | | ISID + iSCSI Target Name + |  | ISID + iSCSI Target Name +  | | |
    | | | Portal Group ID)           |  | Portal Group ID)            | | |
    | | +----------------------------+  +-----------------------------+ | |
    | |                                                                 | |
    | |                    iSCSI Target Node                            | |
    | +-----------------------------------------------------------------+ |
    |                                                                     |
    |                       Network Entity                                |
    +---------------------------------------------------------------------+
    
    
    Andre Asselin
    IBM ServeRAID Software Development
    Research Triangle Park, NC
    
    
    
                                                                                                                                          
                        John Hufferd                                                                                                      
                                             To:     Andre Asselin/Raleigh/IBM                                                            
                        11/06/2001           cc:     ips@ece.cmu.edu                                                                      
                        03:33 PM             From:   John Hufferd/San Jose/IBM@IBMUS                                                      
                                             Subject:     Re: iSCSI: resend of diagram from 2.5.1(Document link: Andre Asselin)           
                                                                                                                                          
                                                                                                                                          
                                                                                                                                          
                                                                                                                                          
                                                                                                                                          
                                                                                                                                          
    
    
    
    Andre,
    Now that I can see the picture that you sent.  It probably now needs to
    have the Names of the Target Side SCSI Ports clearly called out.
    
    The picture might imply to some folks that the SCSI Port Name is associated
    with "iSCSI Name + TSID"  where as the SCSI Port Name should be "iSCSI Name
    + PortalGroupTag".
    
    The picture is, I think, technically correct, the Target End of the Session
    can be associated with iSCSI Name+TSID, but that may cause others to go
    through the same set of discussions that we have held recently, and they
    might think that the SCSI Port Name includes the TSID.  I wonder if it
    would be clearer to Align, in the pictures, the concept of Target End of a
    Session with SCSI Port Name and give it the identification of "iSCSI Name +
    PortalGroupTag" and leave TSID to the various text in the Draft and for it
    be understood as just a Handle which the implementation can use in any way
    it wants.
    
    .
    .
    .
    John L. Hufferd
    Senior Technical Staff Member (STSM)
    IBM/SSG San Jose Ca
    Main Office (408) 256-0403, Tie: 276-0403,  eFax: (408) 904-4688
    Home Office (408) 997-6136, Cell: (408) 499-9702
    Internet address: hufferd@us.ibm.com
    
                                                           
                    Andre Asselin                          
                    11/06/2001 07:38 AM                    
                                                           
                                                           
    
    
    
    To:   John Hufferd/San Jose/IBM@IBMUS
    cc:   ips@ece.cmu.edu
    From: Andre Asselin/Raleigh/IBM@IBMUS
    Subject:  iSCSI: resend of diagram from 2.5.1
    
    
    It looks like my original post with an updated diagram for section 2.5.1
    got wrapped badly.  Here's a second attempt that hopefully will make it
    through.
    
    
    (original)
       ----------------------------IP Network---------------------
             |               |                    |
    +--------|---------------|--------------------|---------------------+
    |   +----|---------------|-----+         +----|---------+           |
    |   | +---------+  +---------+ |         | +---------+  |           |
    |   | | Network |  | Network | |         | | Network |  |           |
    |   | | Portal  |  | Portal  | |         | | Portal  |  |           |
    |   | +--|------+  +---------+ |         | +---------+  |           |
    |   |    |               |     |         |    |         |           |
    |   |    |    Portal     |     |         |    | Portal  |           |
    |   |    |    Group 1    |     |         |    | Group 2 |           |
    |   +--------------------------+         +--------------+           |
    |        |               |                    |                     |
    |   +----------------------------+  +-----------------------------+ |
    |   | iSCSI Session (Target side)|  | iSCSI Session (Target side) | |
    |   |                            |  |                             | |
    |   |  (iSCSI Name + TSID=2)     |  | (iSCSI Name + TSID=1)       | |
    |   +----------------------------+  +-----------------------------+ |
    |                                                                   |
    |                      iSCSI Target Node                            |
    |              (within Network Entity, not shown)                   |
    +-------------------------------------------------------------------+
    
    
    (updated)
    
    
        ----------------------------IP Network---------------------
             |              |                       |
    +--------|--------------|-----------------------|---------------------+
    |        |              |                       |                     |
    |   +----|----+    +----|----+             +----|----+                |
    |   | Network |    | Network |             | Network |                |
    |   | Portal  |    | Portal  |             | Portal  |                |
    |   +---------+    +---------+             +---------+                |
    |        |              |                       |                     |
    | +------|--------------|-----------------------|-------------------+ |
    | | +----|--------------|------+         +------|-------+           | |
    | | |         Portal           |         |    Portal    |           | |
    | | |         Group 1          |         |    Group 2   |           | |
    | | +--------------------------+         +--------------+           | |
    | |                |                             |                  | |
    | | +----------------------------+  +-----------------------------+ | |
    | | | iSCSI Session (Target side)|  | iSCSI Session (Target side) | | |
    | | |                            |  |                             | | |
    | | |  (iSCSI Name + TSID=2)     |  | (iSCSI Name + TSID=1)       | | |
    | | +----------------------------+  +-----------------------------+ | |
    | |                                                                 | |
    | |                    iSCSI Target Node                            | |
    | +-----------------------------------------------------------------+ |
    |                                                                     |
    |                       Network Entity                                |
    +---------------------------------------------------------------------+
    
    Andre Asselin
    IBM ServeRAID Software Development
    Research Triangle Park, NC
    
    
    
    
    
    


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