On Friday, June 7, 2002, at 03:56 PM, Bob Hinden wrote:
> I think the w.g. has some choices to make regarding site-local
> addresses.
>
> 1) Remove site-local from the IPv6.
>
> This would involve remove it from the IPv6 addressing documents and
> find all other documents that mention them and update these. Some of
> these may require significant modification if use site-local as a basic
> part of their mechanisms. There will also be an impact to shipping
> IPv6 implementations. This would have to be sorted out. A good
> understanding of what different vendors plan here would be useful.
>
> 2) Keep site-local but limit it's scope of usage.
>
> This would be something like writing an applicability document that
> defines it usage and for example restricts it use to sites not
> connected to the Internet. Other usage would be for future study.
> This would be consistent with most of the current specifications. It
> would make completing the scoped address architecture document
> simpler. There might be other specifications to update if they were
> using site-local and didn't have any provision to move to global
> addresses.
A potential drawback is that the day those sites connect to the
Internet, they will have to renumber.
Until the renumbering story is significantly better, there will be
temptations to use IPv6 NAT...
> 3) Keep site-local and allow full usage
>
> This would mean fully specifying how to use site-local, documenting the
> router and DNS issues, completing the scoped addressing architecture
> document, perhaps enhancing IPv6 routing protocols to have more
> knowledge of site-local addresses, etc.
>
> The working group has been going down 3) for some time now. I think
> your email is a good start at seeing if should continue in this
> direction or change course.
This path is expensive, as seen in the current thread.
- Alain.
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