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<div>I think that I will just continue to be the Devil's Advocate.
Let's see how this logic plays in an area where someone is going to
have to make a large investment. I hear that the program
is supposed to eventually get to the Mars. At and on the way to
Mars the standard DSN modulation techniques are optimal. So when we go
to the Moon why not use the standard deep space modulation
methodologies instead of requiring the stations to radiate TDRS
modulations? </div>
<div><br></div>
<div><br></div>
<div>At 1:02 PM -0500 6/7/07, Schneider, Larry wrote:</div>
<blockquote type="cite" cite>Content-class:
urn:content-classes:message<br>
Content-Type: multipart/alternative;<br>
<x-tab>
</x-tab>boundary="----_=_NextPart_001_01C7A92D.FAD1CCA7"<br>
</blockquote>
<blockquote type="cite" cite><font face="Arial"
color="#0000FF">CEV has a requirement to support IPv4 with a
transition to IPv6 for lunar. By going early they avoid the cost
to support both solutions and an awkward program
transition.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Arial" color="#0000FF">Mobile
IP is included and standardized in IPv6 whereas in IPv4 it is
supported only under proprietary solutions.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Arial" color="#0000FF">IPv6
eliminates private addresses.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><font face="Arial" color="#0000FF">I'm
not suggesting it can't work either way, I'm only indicating how it
currently from my vantage.</font></blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite>
<hr></blockquote>
<blockquote type="cite" cite><font face="Tahoma"
size="-1"><b>From:</b> Donald P Olsen
[mailto:Donald.P.Olsen@aero.org]<br>
<b>Sent:</b> Thursday, June 07, 2007 10:53 AM<br>
<b>To:</b> Schneider, Larry<br>
<b>Cc:</b> David Carek; CCSDS Cislunar Space Internetworking WG;
sis-csi-bounces@mailman.ccsds.org<br>
<b>Subject:</b> RE: [Sis-csi] IPv6?</font><br>
<font face="Tahoma" size="-1"></font></blockquote>
<blockquote type="cite" cite><br>
<font size="-1">Greetings</font><br>
<br>
<font size="-1">Moorse(sp) law is a great mitigator to address space
cost in space.</font><br>
<br>
<font size="-1">Don</font><br>
</blockquote>
<blockquote type="cite" cite><font size="-2"><b>"Schneider,
Larry" <larry.schneider@nasa.gov></b></font><br>
<font size="-2">Sent by: sis-csi-bounces@mailman.ccsds.org</font><br>
</blockquote>
<blockquote type="cite" cite><font size="-2">06/07/2007 08:18
AM</font><br>
</blockquote>
<blockquote type="cite" cite align="right"><font
size="-2">To</font></blockquote>
<blockquote type="cite" cite><font size="-2">"David Carek"
<David.A.Carek@nasa.gov>, "CCSDS Cislunar Space
Internetworking WG"
<sis-csi@mailman.ccsds.org></font></blockquote>
<blockquote type="cite" cite align="right"><font
size="-2">cc</font></blockquote>
<blockquote type="cite" cite align="right"><font
size="-2">Subject</font></blockquote>
<blockquote type="cite" cite><font size="-2">RE: [Sis-csi]
IPv6?</font></blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite><br>
<br>
<br>
<tt><font size="-1">At this point it appears likely that CEV and MS
will support IPv6 from<br>
the outset. An answer is expected in the summer timeframe.<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: sis-csi-bounces@mailman.ccsds.org<br>
[mailto:sis-csi-bounces@mailman.ccsds.org] On Behalf Of David
Carek<br>
Sent: Thursday, June 07, 2007 10:12 AM<br>
To: CCSDS Cislunar Space Internetworking WG<br>
Subject: Re: [Sis-csi] IPv6?<br>
<br>
<br>
I personally don't think address space is a driver in determining
NASA's<br>
space protocol needs. Space assets are very expensive and I
doubt there<br>
will be a significant number off addresses required. NASA
already has a<br>
significant allocation of v4 address it can use. Either version
will<br>
work from an address space point of view.<br>
<br>
Edward Greenberg wrote:<br>
> Marc, Maybe this is a dumb question but if the all the
Earth systems<br>
> are transferring to IPv6 is there anyone that is the broker
for<br>
> trading<br>
> IPv6 address space for IPv4 address space. If so then by
2010 there<br>
> should be lots of IPv4 addresses available. If NASA
transforms itself<br>
<br>
> to IPv6 then what happens to all of NASA's IPv4 address? If
JSC<br>
> transfers over to IPv6 would there be enough IPv4 addresses
to<br>
> accommodate NASA's space address space needs indefinitely?<br>
><br>
><br>
><br>
> At 10:06 AM -0400 6/7/07, Marc Blanchet wrote:<br>
>> Hi,<br>
>> as you might have noticed, ARIN board recently advised
the community<br>
<br>
>> that IPv4 addresses are going away and push the community to
consider<br>
>> IPv6 asap... The concensus currently is that IPv4 addresses
will be<br>
>> gone by 2010 from the IANA pool and then x months later from
the RIR<br>
>> pool. Given that space projects are "long term"
projects, at the<br>
>> time some IP address space will be needed for space in, say
2012,<br>
>> then v4 addresses won't be available. only IPv6 addresses
will be<br>
available.<br>
>> given the multi-international scope of space projects,
I can't<br>
>> imagine having IPv4 NATs between spacecrafts that forces VoIP
traffic<br>
<br>
>> to go through earth just because of traversing NAT...
ouach....<br>
>> therefore, I think this group should really
consider:<br>
>> - ipv6 as the primary IP protocol<br>
>> - ipv6 as possible only IP protocol</font></tt></blockquote>
<blockquote type="cite" cite><tt><font size="-1">>> - designing
a contingency plan if v4 is still considered.<br>
>><br>
>> comments?<br>
>><br>
>> references:<br>
>> - ARIN board resolution on IPv4/Ipv6:<br>
>> http://www.arin.net/announcements/20070521.html<br>
>> - exhaustion of IPv4 address space timeline:<br>
>> http://www.potaroo.net/tools/ipv4/index.html<br>
>><br>
>> Marc.<br>
>><br>
>><br>
>> _______________________________________________<br>
>> Sis-CSI mailing list<br>
>> Sis-CSI@mailman.ccsds.org<br>
>> http://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-csi<br>
><br>
><br>
> _______________________________________________<br>
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> Sis-CSI@mailman.ccsds.org<br>
> http://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-csi<br>
<br>
<br>
--<br>
David A. Carek, P.E.<br>
NASA Glenn Research Center<br>
216-433-8396 (Office)<br>
216-978-8063 (Mobile)<br>
<br>
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>
<tt><font size="-1"></font></tt></blockquote>
<blockquote type="cite" cite><br>
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