Re: Why?
2005-03-12 08:17:11
In the near term, we should recommend more liberal address assignment
policies so that multiple prefixes and renumbering are not needed
The problem with this is that multiple addresses were adopted as the
way to do large-scale multi-homing (i.e. having a lot of multi-homed
sites) because it was the only approach that seemed technically
feasible within the existing architecture (both routing, and the
various namespaces).
if it seemed technically feasible, perhaps it was because a problem one
hasn't tried to solve yet (and which is "somebody else's problem")
seems more feasible than a problem one is familiar with.
It may well be true that in practise, having several addresses (in the
sense of "names that identify both location and identity") is
unworkable. If so, that inevitably means that scalable multi-homing is
not practical with IPv6 - and it also inevitably means that the multi6
effort ought to be abandoned.
we haven't determined that the situation is unworkable, but neither
have we found a way to make it workable. also, there is room for
compromise. It appears to me that renumbering and multihoming can be
made manageable with some additional protocol support (HIP being
potentially one of the pieces, but only one of them) _and_ with some
constraints on the use of multiple address prefixes. (at present
there are many more pressures for hosts to have multiple addresses than
just v6 renumbering and multihoming)
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