Re: Updated IID length text

Brian E Carpenter <brian.e.carpenter@gmail.com> Thu, 19 January 2017 19:26 UTC

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Subject: Re: Updated IID length text
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Fri, 20 Jan 2017 08:26:30 +1300
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On 19/01/2017 22:26, Alexandre Petrescu wrote:
...
> I do not agree with the part that says "IIDs are required be 64bit long".

But they are, today. In the move to full Standard, we cannot actually
change that; we can only clarify the wording.

> If IIDs are required to be 64bit long (even if only in the 000-prefixed
> space) then the network can not grow at the edges, at least not with
> SLAAC.

That would be true if /64 prefixes were scarce. They are not. But that's
why the proposed text is limited to currently allocated unicast space -
if we ever need to change this, it will be a new tranche of unicast space.
In any case, this is nothing to do with progressing to full Standard.

   Brian