nanog mailing list archives
Re: Important IPv6 Policy Issue -- Your Input Requested
From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Tue, 16 Nov 2004 00:53:51 +0100
On 15-nov-04, at 23:10, Adi Linden wrote:
Aren't unique site locals associated with the mac address?
Not really. Unique site local addresses as such don't have anything to do with MAC addresses. However, most IPv6 addresses (including, presumably, unique site locals when they are deployed) contain a MAC address in the bottom 64 bits. This happens when stateless autoconfiguration is used: routers broadcast (well, multicast) the top 64 bits and hosts fill in the lower 64 bits with a unique value. This was the MAC address (if available) until privacy advocates came along and now there is also RFC 3041 which uses random numbers for this.
Note though that it is by no means required to use stateless autoconfiguration: you can set the address(es) manually, or you can use DHCP for IPv6. Also note that (AFAIK) of the major OSes and out of the box, only Windows supports RFC 3041, and Windows and MacOS don't (yet?) come with DHCPv6 support, and it doesn't look like it's easy to add it yourself (like in the *nix world) either.
Current thread:
- Re: IPV6 renumbering painless?, (continued)
- Re: IPV6 renumbering painless? Henning Brauer (Nov 13)
- Re: IPV6 renumbering painless? Iljitsch van Beijnum (Nov 13)
- Re: IPV6 renumbering painless? Henning Brauer (Nov 13)
- Re: IPV6 renumbering painless? Owen DeLong (Nov 13)
- Re: IPV6 renumbering painless? Christopher L. Morrow (Nov 13)
- Re: IPV6 renumbering painless? Alexei Roudnev (Nov 13)
- Re: IPV6 renumbering painless? Christopher L. Morrow (Nov 12)
- Re: Important IPv6 Policy Issue -- Your Input Requested Randy Bush (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Iljitsch van Beijnum (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Adi Linden (Nov 15)
- Re: Important IPv6 Policy Issue -- Your Input Requested Iljitsch van Beijnum (Nov 15)
- Re: Important IPv6 Policy Issue -- Your Input Requested Måns Nilsson (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Randy Bush (Nov 11)
- RE: Important IPv6 Policy Issue -- Your Input Requested Tony Hain (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Leo Bicknell (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Joe Abley (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Valdis . Kletnieks (Nov 11)
- Re: Important IPv6 Policy Issue -- Your Input Requested Eric Gauthier (Nov 08)
- Re: Important IPv6 Policy Issue -- Your Input Requested Randy Bush (Nov 08)
- Re: Important IPv6 Policy Issue -- Your Input Requested Daniel Roesen (Nov 08)
- Re: Important IPv6 Policy Issue -- Your Input Requested Randy Bush (Nov 08)