[arin-ppml] IPv6 Non-connected networks

[William Herrin]

On Sat, Feb 6, 2010 at 1:11 PM, Michael Richardson <mcr at sandelman.ca> wrote:
>
>>>>>> "George" == George Bonser <gbonser at seven.com> writes:
>    George> Would seem to me like a better idea than using globally
>    George> unique space for unconnected networks. It would require
>    George> renumbering if you went connected, though.  So does it boil
>
> No renumbering required.  That's IPv4 think.
>
> In IPv6 is common and routine to have multiple addresses per interface.
> If you connect, then you get PA address space from your ISP (de jour).

Michael,

Unfortunately, that's not true in any practical sense of the word.
Multiply-connected hosts was a goal in IPv6's design but it's only
partially implemented in deployed IPv6. The full suite of capabilities
necessary for it to work in a manner that justifies a comment along
the lines of "renumbering is IPv4-think" don't yet exist.

The IETF has at least two working groups in the early phases of trying
to make IPv6's multi-addressing promise come true: MultipathTCP and
MIF. The Multiple InterFaces WG is the most directly involved in the
issue and unfortunately the closest to square-one. There's also some
routing work needed to enable multi-addressed hosts in nontrivial
networks but that has not yet begun. When it does, look for it to
appear in working groups like GROW and RRG.

Regards,
Bill Herrin


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