IPv6 and DNS

Matthew Palmer mpalmer at hezmatt.org
Sun Jun 12 02:04:08 UTC 2011

On Sat, Jun 11, 2011 at 10:30:26PM -0300, Fabio Mendes wrote:
> Firstly, sorry if this may sound too newbie for the list. Reading the
> discussion about dhcpv6 vs RAs, this question just popped in my mind.
> It seems that most of IPv6 addressing for hosts will be choosed using EUI-64
> method. Considering that no one (specially endusers) will bother to memorize
> an IPv6 prefix plus a mac address, integration between DNS servers and
> routers/dhcpv6 servers will be crucial.
> For dhcp there is already a mechanism for updating names in the DNS server
> for dynamically assigned IPs. I suppose it will be used (use some
> modifications) for IPv6.
> However, I never heard of anything similar for routers (in the case of
> autoconfigured addresses).
> Are there any dns servers that support updates from routers ?

The router isn't assigning an address, it's merely telling everyone on the
segment what the local prefix and default route is.  As such, there's no
reason why the router should try to register a DNS entry.

On the other hand, the host could (and should) register it's address with
whatever DNS server handles it's name.  The protocol for such is already
standardised and should be independent of IPv4/IPv6.

- Matt

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