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<font color="#0000FF">At 04:02 AM 6/21/2005, Lloyd Wood of Cisco
wrote:<br>
</font><blockquote type=cite class=cite cite="">This HDLC approach has
been proposed in the space agency domain for their CCSDS protocols, as
easier than the various existing and arcane IP-in-CCSDS encapsulations.
</blockquote><br>
"Easier" and "arcane" are subjective terms. The
current four variants of internationally standardized space link
protocols that are defined by the CCSDS Space Link Services Area
<a href="http://public.ccsds.org/publications/default.aspx" eudora="autourl">
http://public.ccsds.org/publications/default.aspx</a> provide standard
mechanisms for directly multiplexing variable-length IP packets into the
link framing mechanisms, as well as a lightweight encapsulation mechanism
<a href="http://public.ccsds.org/sites/cwe/rids/Lists/1331R3/Attachments/133x1r3.pdf" eudora="autourl">
http://public.ccsds.org/sites/cwe/rids/Lists/1331R3/Attachments/133x1r3.pdf</a>
that may be useful for carrying a variety of upper layer data units such
as IPv6 (including jumbograms). The current standards also allow a serial
stream to be carried point-to-point across a single link. The goal of the
current BOF is to examine whether there is a need to more clearly and
centrally define how these various IP transfer options operate. We would
welcome a liaison relationship with the new IP over DVB-S2
study.<br><br>
Best regards<br>
<x-sigsep><p></x-sigsep>
Adrian J. Hooke<br>
Chairman, CCSDS Engineering Steering Group (CESG)<br>
NASA Jet Propulsion Laboratory, <br>
Interplanetary Network Directorate<br>
Pasadena, California, USA<br>
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