On Tue, Nov 12, 2002 at 06:21:42PM +0200, Markku Savela wrote: > > > Er, but I use global addresses every day on good ol' IPv4, within my > > employer's internal network, and they work just fine when external > > connectivity is broken. I see no advantage in local addresses here. > > Well, but that may change in IPv6: when your global connection > disappears, your routers may stop advertising the global prefixes in > RA's, thus your connections using global addressess will fail, because > there is no route (onlink prefix) for them anymore. > > Of course, your routers may keep on announcing the global > prefixes. However, there may be some confusion, if your new global > connection brings up a different prefix (site renumbering), and your > old prefix has been assigned to someone else. > > I think this is just a choice for site to make, if they know they have > fixed global prefixes, they don't need to configure their routers to > advertise site locals. They just configure the fixed globals. Again, > no problem.
That may be true, but I was also considering the fact that a discontinuity event may be between connections where different prefixes are used. Thus you could still use the global addresses allocated at the last time of connection (if you are isolated you can in theory use what you like...), but this prefix and the addresses may change with the next connection. If you know you'll come back online with the same addresses, you may be able to make different assumptions (but as Keith said earlier, the applications won't be aware of this). Tim -------------------------------------------------------------------- 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] --------------------------------------------------------------------
