> We can never prevent a site from internally subnetting on any boundary > it chooses, but we should be very clear about the consequences. At the > same time we have to be consistent in our discussions with the rir's and > providers about making sure sites have at least the options of /48 & > /64, and that attempts to allocate less will result in ugly hacks that > will be hard for them to maintain.
agree entirely. > The strongest reason to make this a hard architectural boundary is to > simplify the dev/test/interoperability of the code for the platform > vendors. I guess I'm arguing that we should make it clear to vendors that it's *not* reasonable to assume that nobody will ever need to subnet beyond /64. > Sites that accept a /64 are stuck with a single subnet, unless > they have sufficient technical knowledge to break the architecture and I'm arguing that the 64 bit boundary should not be a wired-in part of the architecture (just as in hindsight it turned out to be a bad idea to make class a/b/c boundaries a part of the v4 architecture) it's not just for sites - someday we may be forced to rethink allocation strategies in a way that gives sites less than /64. > If a site receives a /64 from their provider, the simplest approach > would be to bridge the environment. For those that want a more complex > topology, they will be better-off to lobby their provider for more > space. Given track records, this is likely to be possible for a simple > matter of more money. 'more money' is not always a simple matter - sometimes the difference is between being able to operate at all or not. > For those who don't want to pay for address space, > but do want to pay for the cost of local implementations which subnet > longer than /64, they are free to do so. One might point out this is a > false economy, but people don't always listen. and it's not always a false economy. it depends on the other factors. 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] --------------------------------------------------------------------
