In your previous mail you wrote:

   Well, addr-arch states that routers MUST drop traffic with site-local 
   source address at the edge of a site.
   
=> yes, there is a new ICMP error for this case.

   But as site is rather vaguely defined, I think many vendors just skip this 
   little detail..
   
=> I disagree: we have a similar but more complex issue for multicast
forwarding and the zone boundary check is very easy to implement
(this point was verified when the multicast addressing stuff was advanced).
If this is the only hard point in a multi-sited implementation I (and many
of us) will be *very* happy (:-)!

Thanks

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