On Mon, Oct 10, 2011 at 01:06:23PM -0400, Michael Richardson wrote:

>       example.com           NS reachable by the world.
>       garden.example.com    NS pointing to AAAA record, where IPv6
>                             address is only reachable from garden.
>       television.garden.example.com    AAAA returned from
>                             garden.example.com name server (above)
> 
> This solution works perfectly in IPv4 land, but due to lack of IPv4

it works, but nowhere near perfectly. Whenever a querying system
changes its intended name space (resolution context) from $local
to the global one, resolution of names in garden.example.com
will just time out. Encoding this user experience in the design looks
like a suboptimal choice to me.
For resolution from the inside, you'd likely be dependent on access
to the external delegation, which may not be feasible, either.

> It seems to me that we just don't need anything else in IPv6, except
> easily *available* non-connected PI address space (whether it's ULA-C,
> some recognized part of 2000::/3, or an entirely new space).

While ULAs would "reduce" collisions, the general issues would be the same
as with RFC1918 space.

A single "local" context won't be enough.

-Peter
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