Re: please read: Clarification on GUID's universal/loc al bit

Yes.  This is how one could construct an IPv6 IID from an the lower 64 
bits of an IB GID.

I've attached a write-up that goes into detail on the IB solution.  Also 
see below for a note on timeframe

Margaret Wasserman wrote:
> 
> Hi Daniel,
> 
> It is good to know that the IBTA is working to address this issue.
> 
> If I understand your proposal correctly, once this change has been 
> adopted by the IBTA, the correct way to build a IPv6 IID from a GUID 
> would be:
> 
> (1) Start with the 64-bit GUID
> (2) If the OUI portion of the GUID is equal to the specified value, then 
> the "u" bit should be cleared (regardless of its original value) to 
> indicate that the IID is locally administered.
> (3) Else (if the OUI portion of the GUID does not equal the specified 
> value) the "u" bit should be set
> (regardless of its original value) to indicate that the IID is globally 
> unique.
> 
> If I am understanding you correctly, this would always result in the 
> proper setting of the "u" bit in IPv6 addresses.
> 
> What is the timeframe for an IBTA decision on this issue?  This is 
> somewhat urgent, as we won't be able to finalize and approve the IPOIB