>>> Call this "making sure I'm on the same page as anyone else"…
>>> 
>>> RFC 4941 describes privacy addresses, and RFC 4291 describes an EID based 
>>> on a MAC Address. RFC 4862 describes stateless address autoconfiguration, 
>>> and uses RFC 4861's duplicate address detection mechanism.
>>> 
>>> My question is: what happens if any of them discovers that it has created 
>>> an address that is already in use in the network?
>>> 
>>> There would appear to be two options: 
>>> (1) "ah, OK, I guess I didn't really want to talk today"
>>> (2) Following RFC 4941, guess again until one creates a unique address
>>> 
>>> Is it fair to assume that implementations do DAD and follow (2)?
>> 
>> implementations I'm familiar with do 1.
>> it may be a fair assumption that if an address based on the MAC address is 
>> duplicate, the MAC address itself is a duplicate.
> 
> And that relates to privacy addresses how?

it doesn't. is your question how DAD is done for privacy addresses?

then section 3.3 of RFC4941 is quite clear on that.

cheers,
Ole

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