Re: about Wedgelayer 3.5 / Fat IP approaches

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

> what about cgas?
> They are locators, so you can use them for refferals to non multi6 apps 
> and hosts, they allow to map from id to locators using reverse dns, and 
> they are crypto in nature
> seems a good candidate to me :-)

A downside of CGA approaches is that they would, on a global basis,
cast the /64 subnet prefix boundary in stone forever.
This is different than SeND which only assumes the /64 on a single link,
and one can envision SeND evolving to handle different subnet prefix lengths
over time.

Different people probably have very different level of concern for
"/64 forever in stone" ranging from it being a good simplification
to a fatal repeat of the 8 bit IPv4 network number + 24 bit host number
(before Class B and C was invented).

   Erik