> >> Michel Py wrote: > >> So what is the difference between this new GUPI block > >> and GUSLs, except that you want a possible evolution > >> to globally routable for the new GUPI block? > > > Keith Moore wrote: > > problems with GUSLs as an alternative to GUPIs: > > - the proposed uses of PI globals change too many > > assumptions about how SLs were to be used to reuse > > the FEC0::/10 prefix for that purpose. > > GUSL does not create PI globals. As its name implies, it creates > globally unique site-locals, which would avoid NAT and/or renumbering > when two sites connect.
I don't think we should use FEC0::/10 for these. Those were intended as site-local addresses, and people have ideas that these have security properties, that applications should favor them, etc. Making SLs globally unique and routing them between sites amounts to an architectural change - but more importantly it conflicts with assumptions that are already built into some applications and into people's minds. > > - there were too many conflicting or intractable > > assumptions about SLs anyway > > Assumptions in current drafts? yes. > > - we need PI globals that can be routed between sites > > by private agreement anyway. > > We need _something_ that can be routed between sites by private > agreement only. This does not need to be global. I'm convinced it's easier to make things work (especially DNS PTR lookups) if they are globally unique than if they are only probably unique. > >> The obvious answer is that we create a new block _then_, not now. > > no, because we need the block now to solve the problems with SLs. > > You are missing the point. If network administrators do not like > restricted SLs, they will use 2002:0A00::/24 instead, a one-way ticket > to NAT. humbug. this is too fanciful to have any credibility. why should network adminis pick an obscure prefix when we are making much better and more obvious solutions available? Keith -------------------------------------------------------------------- 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] --------------------------------------------------------------------
