[radvd-devel-l] searching the list / DDNS

Pekka Savola pekkas at netcore.fi
Tue Mar 1 01:05:36 EST 2011

On Mon, 28 Feb 2011, Reuben Hawkins wrote:
> No.  It's not really possible with radvd.  Radvd's main purpose is to advertise the network prefix(es).  A host can
> trigger radvd to send the prefix, and radvd logs the link local address, but the host doesn't obtain its address
> from radvd, only the network prefix(es).  The host creates its own address, and verifies it's unique with DAD
> (Duplicate Address Detection).  Radvd in unaware what address the host configured.
> Additionally, a host can just wait for a periodic advertisement...  So a host may receive the prefix info from radvd
> and autoconfigure without radvd knowing about it.
> DHCPv6 may do something like that (but that's a question for a different mailing list)...

To add to this, there isn't much that radvd (router advertisement) can 
do about this.

The two basic models here are:
  1) DHCPv6 address configuration where DHCP server updates DNS
  2) Stateless address configuration where the host updates DNS

We wrote a little bit about this in Section 7 of RFC4472.

The biggest issue in the general case with 2) IMHO is authorization to 
do the DNS update.

Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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