During the WG meeting, we agreed to work on the definition of a globally unqiue site 
local addressing architecture, so that we can eventually deprecate site local 
addresses. I am listing here so far a couple of points that were made by different 
speakers, as an introduction to the debate:
 
* we want to remove ambiguity, which is the root cause of many problems occuring when 
scoped addresses leak.
 
* we may or may not want to prevent routing of these addresses between sites. I guess 
we should certainly prevent routing between non-consenting sites.
 
* we definitely want the addresses to be provider independent, so they can survive 
renumbering or intermittent connectivity.
 
* indeed, it would be desirable that the addresses be usable in sites that are not 
connected.
 
* and we would definitely want the addresses to be free.
 
One of the main point of contention regarded routing. I guess that the consensus is, 
"just like site local addresses." We don't want to prevent usage in connected sites, 
but we expect that in these sites the hosts will also have provider based addresses, 
and that traffic routed out of the site will use the provider addresses.
 
Now, I guess we have to work from there. 
 
-- Christian Huitema

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