> >> A reasonable prefix will end with at least 64 zeros, so :: will > >> always be the last element according to RFC 5952. (Unless someone > >> uses prefixes longer than /64, in which case I for one don't care.) > > > > a shame. once upon a time, the academics in the ietf did care about > > operational networks. > > I'm not sure that I've yet seen a case where >64 is operationally > justified, except for the /126 or whatever discussion we had a while > back for pt2pt links - where I don't think the problem that started > this thread would apply.
For pt2pt SDH links you want /127 to avoid the ping-pong problem, not /126. In any case, there are plenty of providers (including some of the world's biggest) which have chosen to use prefixes longer than /64 in their networks - so obviously *they* think it is operationally justified. Steinar Haug, Nethelp consulting, sth...@nethelp.no -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
