-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Adam Tauno Williams wrote:
The 40-bit site-id is supposed to be random, so the unique local address isn't guaranteed to be unique, but does have a very high probability of being so. The thing is - todays RFC1918 IPv4 addresses are obviously not unique, but also not routable, but what's with these most-probably-unique IPv6 addresses that appear to be routable? It's been a while since I read about it, but there are different tiers of addresses. The bottom address range is based strictly on the MAC address and is non-routeable. There are also other tiers that are limited to an organization or even to a part of the organization. These ranges are routeable, but not allowed on the internet, in the manner of RFC1918. Address ranges in IPv6 is a topic in and of itself.
2001::/16 - Allocated to RIRs 2002::/16 - Allocated to 6t4 fe80::/10 - Link local, those-MAC-derived addresses, at least for Ethernet. It uses a mechanism knows as SLAAC to come up with, at least on Ethernet, theoretically unique address. fec0::/10 - Site local, like 192.168.x.x, 10.x.x.x, etc... fc00::/8 - Unique Local, allocation still up in the air last I knew. But these are like a real network address but not routeable (?). fd00:/8 - Another kind of Unique Local, even more mysterious than fc00::/8. But you can get one from SixXS who seem to have appointed themselves as a registrar. This is what we use internally (one of these) for now.
This is really illustrates an issue which will probably put many of those with more complex infrastructures off from being early adopters of the technology. (BTW in this context it is easy to confuse size with complexity, big can be quite simple). This a bit of a catch-22 situation, until network specialists have idea of how this technology will behave in complex environments they will be wary about adopting it in such environments, however to get an idea of how it will behave someone has to implement it in an appropriate real scenario (and share the results). No one really wants to be the first person to shoot themselves in the foot (at least not publicly :-) ). A fair number of people who have reached the position to manage these things will have learnt the hard way there is often more pain than gain in being an early adopter of a new technology. - -- ============================================================================== I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. Bjarne Stroustrup ============================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/ iEYEARECAAYFAkri07IACgkQasN0sSnLmgK6NQCg6DTNOqd8yAcA8tBPSEJ+JidI fYMAoMkt8hO++icywKIFfPJWNNWMdLDQ =aUVF -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org