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    RE: iSCSI: Representing iSCSI devices on FC fabrics


    • To: <ips@ece.cmu.edu>
    • Subject: RE: iSCSI: Representing iSCSI devices on FC fabrics
    • From: "Elliott, Robert" <Robert.Elliott@compaq.com>
    • Date: Fri, 16 Nov 2001 13:18:24 -0600
    • content-class: urn:content-classes:message
    • Content-Transfer-Encoding: 8bit
    • Content-Type: text/plain;charset="us-ascii"
    • Sender: owner-ips@ece.cmu.edu
    • Thread-Index: AcFubjRZK3uPCtasQFeyQaMzz6nVRgAQ+tTwAAhLSeA=
    • Thread-Topic: iSCSI: Representing iSCSI devices on FC fabrics

    Correction - the company_id is 24 bits, not 20 bits.
    
    EUI-64 = (MSB) { 24-bit company_id, 
                     40-bit vendor specified } (LSB)
    
    FC WWN = (MSB) { 4-bit NAA field, 
                     24-bit company_id, 
                     36-bit vendor specified } (LSB)
             (for the IEEE Registered NAA type)
    
    
    > -----Original Message-----
    > From: Elliott, Robert 
    > Sent: Friday, November 16, 2001 9:33 AM
    > To: ips@ece.cmu.edu
    > Subject: RE: iSCSI: Representing iSCSI devices on FC fabrics
    > 
    > 
    > Beware than a FC WWN is not the same as an EUI-64.  They're both based
    > on the IEEE OUI/company_id, but the FC WWN uses the 4 most significant
    > bits for a "Name Address Authority" field and has 4 fewer 
    > bits available
    > in the vendor specified portion.
    > 
    > EUI-64 = (MSB) { 20-bit company_id, 
    >                  44-bit vendor specified } (LSB)
    > 
    > FC WWN = (MSB) { 4-bit NAA field, 
    >                  20-bit company_id, 
    >                  40-bit vendor specified } (LSB)
    >          (for the IEEE Registered NAA type)
    > 
    > ---
    > Rob Elliott, Compaq Server Storage
    > Robert.Elliott@compaq.com
     
    


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Last updated: Mon Nov 19 09:17:42 2001
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