Pete Resnick wrote:

>>> and can be used by other
>>> people who build sane equipment that understands "shared" addresses can
>>> appear on two different interfaces.
>> With so complicated functionality of NAT today, the only
>> practical approach to build such equipment is to make it
>> a double NAT
> 
> Correct.

Note that the double NAT, here, is AN equipment.

>> Can IETF allocate such address?
> 
> That's what this document is doing: Allocating address space to go 
> between 2 NATs.
> 
> Maybe I don't understand your question?

My point is that those who are arguing against the proposed
allocation because of the capability of a double NAT
equipment should argue for allocation of another space
to enable development of the double NAT equipment.

                                                Masataka Ohta
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