Sean Doran wrote:
> 
> Hakikur Rahman <[EMAIL PROTECTED]> writes:
> 
> > I agree with Brian Carpenter,
> > "We expect millions of those during v6/v4 coexistence."
> > Hakik.
> 
> So back to my original question, which apparently none of
> the IPv6-Leaders liked:
> 
>   -- if we are doing tunnels which follow a logical
>      topology rather than a physical one,
>   -- why don't we have support for multihoming to
>      different logical topologies

We should. But multihoming is still a hard problem and we are
still working on it in IPNGWG. 

>   -- with policy routing done on the host-side with
>      respect to selecting which of various address
>      combinations to use/allow for traffic exchanges

This is part of the hard part, too complex for a short email.
(I'm not trying to brush it off - it needs to get done.)

>   -- thus allowing generalized topologically-addressed VPNs
>      (with the topologies being virtual, constructed with tunnels)
>   -- thus allowing a partitioning of the IPv6 address
>      space in a way that is simultaneously both
>      topologically aggregatable _and_ policy-based

That would be good.
> 
> The missing piece is the control over who gets to
> terminate a tunnel into a particular address space.

Isn't that a business issue? 

   Brian

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