nanog mailing list archives

Re: IPv6 fc00::/7 — Unique local addresses


From: Jeroen van Aart <jeroen () mompl net>
Date: Wed, 20 Oct 2010 17:21:22 -0700

Deepak Jain wrote:
According to the RFC:

3.2.1.  Locally Assigned Global IDs

   Locally assigned Global IDs MUST be generated with a pseudo-random
   algorithm consistent with [RANDOM].  Section 3.2.2 describes a

Global ID in this case means the 40 bit pseudo random thing. The point here is, we are all supposed  to pick our own 
poison and pray that we are unique. Though an algorithm is suggested in 3.2.2. Perhaps SIXXS uses it. Anyway, the SIXXS 
tool seems pretty slick.

All thanks for the information. I'll be using the "40 bit pseudo random thing" since it seems to be the smart thing to do, using the SIXXS tool. One may hope that something will become the "official" way to generate these numbers (perhaps the above mentioned tool).

Someone advised me to use GUA instead of ULA. But since for my purposes this is used for an IPv6 LAN would ULA not be the better choice?

Thanks,
Jeroen

--
http://goldmark.org/jeff/stupid-disclaimers/
http://linuxmafia.com/~rick/faq/plural-of-virus.html


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