> E.g are you able to send a packet like:
> 
> src=global1
> dst=globalA
> routing header=site_localA, segments left=1
> 
> which would be translated at globalA to:
> 
> src=global1
> dst=site_localA
> routing header=globalA, segments left=0  ?
> 
> I think we need to have a much much more clearer view of what 
> is possible 
> and what is not when crossing zone boundaries with routing headers.

To prevent this I have a check when processing routing headers - when
swapping the old destination and the new destination, it's an error if
the new destination has smaller scope than the old destination.

I think it's important that when a packet arrives at its final
destination, if that destination is link-local then the receiving
application can know that the packet originated on-link, and if the
destination is site-local then the application can know that the packet
originated within the site.

Rich

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