[Sis-csi] CANDOS networking details

[Keith Hogie]

All,

   Attached is some more details on the CANDOS configuration.  It has
Dave's high level diagram followed by more details on the I&T systems,
the operational systems, and external systems.  I also added some words
on basic data flow characteristics and Mobile IP and manual tunnel
operations.

   The IP addresses on one of the diagrams are not real but are
representative of those used.  The main thing to keep in mind is that
the spacecraft IP address came from the control center subnet address
range which was a 32 address subnet.  There were lots of other subnets
on the way to the spacecraft but IP tunneling made them transparent
to forward traffic.

   See if any of this makes sense and I can try to fill in details
if you have questions.  It has been 4 years since we did this and I
don' remember all the details but I did find our log book and we
have lots of configuration, log files, and data files around if we have
detailed questions.

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   Keith Hogie                   e-mail: Keith.Hogie at gsfc.nasa.gov
   Computer Sciences Corp.       office: 301-794-2999  fax: 301-794-9480
   7700 Hubble Dr.
   Lanham-Seabrook, MD 20706  USA        301-286-3203 @ NASA/Goddard
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