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Re: IETF multihoming powder: just add IPv6 and stir



	Iljitsch,




It seems to me the problem is that everyone brings different 
assumptions and requirements to the table. For instance, the HIP 
people are mainly interested in security and mobility, and solving 
multihoming is secondary to those goals. Christian Huitema's proposals 
are built around the idea that we can only make baby steps and should 
work as much as possible with existing mechanisms. Michel Py doesn't 
mind much that both ends must be changed in order to support MHAP; in 
my geo stuff I don't worry about the fact that this will impose limits 
on the network topology; and the GSE++ people aren't all that 
concerned with the fact that GSE needs changes to not just one, but 
many aspects of IP: routers, hosts, DNS.



I think that this is a very good summary of the situation. And I think 
that it is good that we from time to time remind ourself of this..:-)




So we should use Vienna to decide WHAT we want to do, the HOW is then 
only a question of engineering, which we're supposed to know how to do 
here in the IETF.



I would also think that this is the main target of the Vienna meeting. 
That said, it doesn't have to be the only thing we do.






It looks like the type of solution that most people like / the least 
people hate is a GSE++/8+8/6+2+10/16+16 type of solution. Such a 
solution is probably the least ambitious that can still be expected to 
work well in the long term and probably the most ambitious we can 
expect to be deployed before we run out of IPv6^H^H^H^HIPv4 address 
space. If we can't reach rough consensus on this as a general approach 
it is extremely unlikely we can reach it on something else.



Note that agreeing on this approach doesn't mean all other proposals 
should be off the table immediately: if they provide additional 
benefits (for instance, they can be deployed before the "official" 
solution is ready) they should be viable so individual authors can 
keep working on them as they see fit.





I agree. Question is, with what you note above, how do we move that 
forward? Leave that to Vienna to discuss or should me and Sean think up 
away and present that?



- kurtis -