nanog mailing list archives
Re: IPv6 fc00::/7 — Unique local addresses
From: Owen DeLong <owen () delong com>
Date: Wed, 20 Oct 2010 17:41:52 -0700
On Oct 20, 2010, at 5:21 PM, Jeroen van Aart wrote:
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 aGlobal 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).
I believe the above mentioned tool uses the OFFICIAL way documented in the RFC. There is an official way to do it. It is documented in the RFC.
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?
IMHO, no. There's no disadvantage to using GUA and I personally don't think ULA really serves a purpose. If you want to later connect this LAN to the internet or something that connects to something that connects to something that connects to the internet or whatever, GUA provides the following advantages: + Guaranteed uniqueness (not just statistically probable uniqueness) + You can route it if you later desire to Since ULA offers no real advantages, I don't really see the point. Owen
Current thread:
- IPv6 fc00::/7 — Unique local addresses Jeroen van Aart (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Jay Ford (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Mark Smith (Oct 20)
- RE: IPv6 fc00::/7 — Unique local addresses Deepak Jain (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Jeroen van Aart (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Owen DeLong (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Graham Beneke (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Mark Andrews (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Owen DeLong (Oct 21)
- Re: IPv6 fc00::/7 — Unique local addresses Ben Jencks (Oct 21)
- Re: Re: IPv6 fc00::/7 — Unique local addresses Mark Andrews (Oct 21)
- Re: IPv6 fc00::/7 — Unique local addresses Owen DeLong (Oct 21)
- Re: Re: IPv6 fc00::/7 — Unique local addresses Mark Andrews (Oct 21)
- RE: IPv6 fc00::/7 — Unique local addresses Deepak Jain (Oct 20)
- Re: IPv6 fc00::/7 — Unique local addresses Karl Auer (Oct 21)
- RE: IPv6 fc00::/7 - Unique local addresses Skeeve Stevens (Oct 21)
- RE: IPv6 fc00::/7 - Unique local addresses Karl Auer (Oct 21)