We are building an IPv6 compliant DNS server appliance. We have researched this issue and have not yet been able to find a good answer to this. The RFC that lists reserved anycast addresses does not list one for DNS yet (but it is of 1999 vintage).
A more recent draft is at http://www.ietf.org/internet-drafts/draft-ietf-dnsop-ipv6-dns-configuration- 06.txt This discusses the three ways to locate a DNS server in an IPv6 network: - Router Advertisement messages - DHCPv6 - Anycast It makes the point that there are issues with multiple DNS servers in a single network segment using the same anycast address, so I assume they imply that there should be multiple DNS anycast addresses defined. They refer to a "well known anycast address" but do not define it or refer to where you can find it. As soon as anycast addresses are defined for DNS servers, we will implement them in our product. Until then, we recommend that you use the other two mechanisms to allow clients to find DNS servers. Of course, in a dual stack network, you can simply define the DNS addresses in IPv4. Once connected over IPv4, you can retrieve IPv4 and/or IPv6 addresses, then connect over one of those (IPv6 is the preferred if both are returned, of course). A related issue is how to register IPv6 addresses of your DNS servers with your registrar (e.g. register.com). None that I know of (perhaps NTT/Verio soon?) allow you to register IPv6 addresses for DNS for a domain. Anyone know of any exceptions to this? Again, as long as we have dual stack, you can register an IPv4 address for each DNS server, and clients can retrieve IPv4 and/or IPv6 addresses from it, over IPv4. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fredrik Tolf Sent: Sunday, July 24, 2005 6:43 AM To: [email protected] Subject: IPv6 autoconf and DNS Hi List! Does anyone know what the current plans are to get DNS working through stateless autoconfiguration? I'm thinking that there should an anycast address or something that denotes "the closest DNS server" or similarly, but I haven't seen any material on any solution whatsoever. Is there any solution already that I've managed to miss, or is there any ongoing work on anything? Thanks for your attention! Fredrik Tolf --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED] --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
