[131123] in North American Network Operators' Group
IPv6 fc00::/7 =?UTF-8?B?4oCUIFVuaXF1ZSBsb2NhbCBhZGRyZXNzZXM=?=
daemon@ATHENA.MIT.EDU (Jeroen van Aart)
Wed Oct 20 17:50:14 2010
Date: Wed, 20 Oct 2010 14:48:47 -0700
From: Jeroen van Aart <jeroen@mompl.net>
To: NANOG list <nanog@nanog.org>
X-Assp-Envelope-From: jeroen@mompl.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
<IPv6 newbie>
According to http://en.wikipedia.org/wiki/IPv6_address#Special_addresses
an fc00::/7 address includes a 40-bit pseudo random number:
"fc00::/7 — Unique local addresses (ULA's) are intended for local
communication. They are routable only within a set of cooperating sites
(analogous to the private address ranges 10/8, 172.16/12, and 192.168/16
of IPv4).[12] The addresses include a 40-bit pseudorandom number in the
routing prefix intended to minimize the risk of conflicts if sites merge
or packets are misrouted into the Internet. Despite the restricted,
local usage of these addresses, their address scope is global, i.e. they
are expected to be globally unique."
I am trying to set up a local IPv6 network and am curious why all the
examples I come accross do not seem to use the 40-bit pseudorandom
number? What should I do? Use something like fd00::1234, or incorporate
something like the interface's MAC address into the address? It'd make
the address quite unreadable though.
Thanks,
Jeroen
--
http://goldmark.org/jeff/stupid-disclaimers/
http://linuxmafia.com/~rick/faq/plural-of-virus.html
