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    RE: iSCSI:draft-ietf-ips-iscsi-reqmts-00.txt



    As Matt pointed out, the paragraph 4 of section 4.2 Framing was badly
    mangled. It should read:
    
    Consider a network pipe at 10 Gbps x 200 msec holds 250 MB. [Assume
    land-based communication with a spot half way around the world at the
    equator.  Ignore additional distance due to cable routing.  Ignore repeater
    and switching delays; consider only a speed-of-light delay of 5 microsec/km.
    The circumference of the globe at the equator is approximately 40000 km (we
    need to consider round-trip delay to keep the pipe full).  10 Gb/sec x 40000
    km x 5 microsec/km x B / 8b = 250 MB].
    
    Marjorie Krueger
    Networked Storage Architecture
    Hewlett-Packard Storage Organization
    tel: +1 916 785 2656
    fax: +1 916 785 0391
    email: marjorie_krueger@hp.com 
    
    > -----Original Message-----
    > From: Matt Wakeley [mailto:matt_wakeley@agilent.com]
    > Sent: Tuesday, November 28, 2000 1:02 PM
    > To: Marjorie Krueger; IPS Reflector
    > Subject: Re: iSCSI:draft-ietf-ips-iscsi-reqmts-00.txt
    > 
    > 
    > Marjorie,
    > 
    > In the draft-ietf-ips-iscsi-reqmts-00.txt document you have 
    > the following:
    > 
    > Consider that a network pipe at 10 Gbps . 200 msec holds 250 MB.
    > [Assume land-based communication with a spot half way around the
    > world at the equator. Ignore additional distance due to cable
    > routing. Ignore repeater and switching delays; consider only a
    > speed-of-light delay of 5 .sec / km. The circumference of the globe
    > at the equator is approx. 40000 km (we need to consider round-trip
    > delay to keep the pipe full). 10 Gb/sec . 40000 km . 5 .sec / km . B
    > / 8b = 250 MB].
    > 
    > 
    > There seem to be a lot of dots "." - were you perhaps using non-ascii
    > characters that did not translate to ascii text?  For 
    > example, I think the "5
    > .sec / km" should be "5 nsec / km" ?
    > 
    


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Last updated: Tue Sep 04 01:06:16 2001
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