Zach,
> Date: Sun, 12 Jul 2009 23:42:05 +0300
> From: Zach Shelby <[email protected]>
>
> A new version of draft-ietf-6lowpan-nd is now available:
>
> http://www.ietf.org/internet-drafts/draft-ietf-6lowpan-nd-04.txt
>
> I will present this in Stockholm, if there are any issues you want me to
> particularly touch on during the WG meeting, please drop me an e-mail.
>
> Changes since -03:
>
> o Moved Ad-hoc LoWPAN operation to Section 7 and made ULA prefix
> generation a features useful also in Simple and Extended LoWPANs.
> (#41)
>
> o Added a 32-bit Owner Nonce to the NR/NC messages and the
> Whiteboard, removed the TID history. (#39)
>
> o Improved the duplicate OII detection algorithm using the Owner
> Nonce. (#39)
I skimmed through the changes and they are definitely an
improvement. Using a nonce is simpler and more foolproof
than the TID history, and uses less RAM as well.
Given the reduced reliance on the TID, perhaps it could be a
single byte. The 32-bit valid lifetime field in the Prefix
Information Option definitely seems like overkill. That is
a lot of precision. Saving space in the ND options may not
matter a lot, given how rarely they are sent, but reducing
the size of a whiteboard entry would be good.
-Richard Kelsey
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