We seem to have a situation of "globally-scoped, persistent, routable: pick any two". 2000::/3 is globally-scoped and routable. fec0::/10 is persistent and routable (within its scope). To allow people the freedom to "pick any two", we need a way to generate addresses that are globally-scoped and persistent, without necessarily being (globally) routable. That's what fc00::/7 would achieve.
I note that in the architectural traditions of the Internet we're not very good at handling addresses that are not both globally-scoped and routable. That's why we're having kittens trying to work out how to deal with fec0::/10 and fc00::/7 addresses. -zefram -- Andrew Main (Zefram) <[EMAIL PROTECTED]> -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
