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What to do with FEC0? [was Re: Moving forward on Site-Local and Local Addressing

Brian E Carpenter writes:
 > Zefram wrote:
 > ...
 > > I'm expecting, by the way, that the deprecation will leave fec0::/10
 > > to be treated as global-scope unicast addresses, rather than making
 > > fec0::/10 addresses cease to function altogether.
 > That's an interesting expectation. As co-author of the planned
 > deprecation draft, I'd been assuming a more classical deprecation
 > action, in which we would simply state the previous semantics of
 > FEC0::/10, state that the prefix SHOULD NOT be used, but leave it
 > permanently assigned by IANA.
 > This would break nothing that runs today.
 > What do people think?

If you truly want to deprecate FECO::/10, I'd say
that it shouldn't be reserved to IANA, but given
to registries with explicit mandate to allocate 
it immediately. 


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