[DNA] Re: Quick review of draft-jinchoi-dna-cpl-00.txt

[Erik Nordmark <Erik.Nordmark@sun.com>]

[catching up after vacation]

> What has possibly been mentioned by Samita (whose point seemed to
> be missed) is that non-movement can _always_ be detected with
> a single RA if that RA contains any single prefix in the prefix
> list.

I think we need to make this more clear in the draft.

> Paragraph 7
> 
> The description of collection of additional groups of RA's from
> a subsequent RS tends to give the idea that the RA sets are
> compared after the end of a 4 second RS interval.

Ditto.

> This is unnecessary, as the main issue is to get additional prefixes,
> rather than checking if there are set changes.  Comparing each
> RA as it arrives is better for this purpose, and allows
> intermediate results for prefix lists to be used (with lower
> confidence) even in the case of incomplete router probing.
> 
> Of course, if there has been a link transition between RS's there
> may be some danger of just adding RAs without prefixes in common
> with others. If any single RA which can be correlated to a later
> RS contains a prefix in common with the PL, all routers so far
> known to be discovered from the same RS belong to the PL.

Or the host moved between different links during the time it
collected the prefixes, and there was no 'link-up' indication that
it might have moved between different links.

   Erik