Re: [v6ops] Discussion of draft-ietf-v6ops-ula-usage-recommendations

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 21 July 2015 18:05 UTC

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Date: Wed, 22 Jul 2015 06:05:18 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] Discussion of draft-ietf-v6ops-ula-usage-recommendations
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On 22/07/2015 04:32, Alexandru Petrescu wrote:

...
> Now I am saying: generate ULA properly, make it truly random.  But how?

This is not the place to debate the philosophical question whether the
phrase "truly random" has any meaning. The (im)probability of collisions is
thoroughly covered in RFC 4193, section 3.2.3.

I would advise using something better than rand(); you can even read
RFC 4086, but really this is all very old news.

   Brian