> I've been telling people for years that with IPv6, you don't need a global 
> scope address on an interface. The routing protocols use link locals, so they 
> don't care. And should an ICMP message need to be generated, the source 
> address is filled in with a global scope address borrowed from another 
> interface that does have one.
> 
> However, I can't find any documentation for this behavior. Is there an RFC 
> that specifies this as part of normal IPv6 router behavior?

weak host model. RFC1122.

cheers,
Ole

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