[Sis-csi] CCSDS Cislunar Telecon tomorrow, 7 Sept

[Keith Hogie]

Marc,

  I agree that it's probably best focus on the CCSDS specific details
and put the IPv6 details elsewhere.  I also just noticed RFC 4294
"IPv6 Node Requirements" which runs through lots of the issues you
mentioned.  But it also has words like "must", "should", and "may"
that seem to provide some wiggle room for skipping some of the
options for certain types of links.  I'm not sure we want to
take advantage of all of the "should" and "may" options and just
say we won't support them though.  Those features are there for good
reasons and we may not want to be too quick to drop them without
doing more analysis of our future space networking needs.

Keith Hogie

Marc Blanchet wrote:

> Le 06-09-07 à 12:39, Keith Hogie a écrit :
> 
>> Marc,
>>
>>   You raise some good points about IPv6 over serial links.  I think  one
>> of the most relevant RFCs is RFC 2590 "Transmission of IPv6 Packets  
>> over Frame Relay Networks".  For IPv4 in space we use RFC 2427 (STD  55)
>> "Multiprotocol Interconnect over Frame Relay".  I haven't read all of
>> RFC 2590 but it looks like it addresses lots of the MTU and address
>> discovery issues for IPv6 over serial links.
> 
> 
> as I wrote, for most if not all link-layers, there is an RFC  describing 
> the interaction and the specifics of IPv6 over that link- layer.
> 
> a good starter is also the RFC on IPv6 over NBMA networks (RFC2491).
> 
>>
>>   We may just want to mention these RFCs to point people at the  details
>> of using IP over FR/HDLC over CCSDS links.  Running straight IPv6 over
>> CCSDS would require adjustments similar to RFC 2590 to be mapped into
>> CCSDS virtual circuits.
> 
> 
> we are in strong agreement!
> 
> Currently, I see the following possibilities (from my point of view):
> a) keep IP over CCSDS doc as is. not sure that is very good.
> b) add text to point to other documents (ex: ipv6 over frame relay).  
> not sure this is complete.
> c) reference a future document to be written which describes the IPv6  
> over CCSDS specifics. the current IP over CCSDS document would only  
> cover the link layer basic stuff (for example, how to identify an  IPv6 
> packet in the encap frame) and clearly state that there is  another 
> document describing the behavior of IPv6  over CCSDS links.
> d) add text in the IP over CCSDS doc to cover all the topics for IPv6  
> over CCSDS.
> 
> I see c) as the best path, but I'm new here in CCSDS...
> 
> Marc.
> 
>>

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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
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