At last IETF, I took an action item to review draft-ietf-6lo-nfc-04. A PDF copy with my marked up comments/suggestions is now at http://research.microsoft.com/~dthaler/draft-ietf-6lo-nfc-04.pdf (Lots of grammatical corrections, for example.)
The main technical comment is that there's nothing in the document that guarantees that the link lifetime is short. E.g. if you leave your phone within 10cm of your laptop, what prevents the link from lasting indefinitely? The IID generation mechanism of padding with a fixed prefix is really bad and needs to be replaced unless there's something that enforces that a link cannot last for more than a tiny amount of time. Dave
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