Re: [dhcwg] Renumbering DNS with stateless DHCPv6

I guess, "stateless" means the server doesn't need to maintain the 
lifetime of the configuration information it has assigned to the clients 
and it doesn't mean that it doesn't need to maintain the information 
about the clients..

The proposal of sending multicast reconfigure message was discussed, but 
it was dropped as its very difficult to achieve multicast security and 
reconfigure mechanism mandates auth...

Vijay

Tim Chown wrote:

>Hi,
>
>I was mulling over the renumbering scenario for hosts that use
>stateless autoconf for address allocation and DHCPv6 Light (stateless
>DHCPv6) for DNS options.
>
>Let's assume either the site renumbers, or the DNS servers are
>renumbered.   The latter case means that you can't just use a new
>prefix on an RA as a hint to re-request DNS options via DHCPv6 Light.
>
>With an RA method for DNS option configuration, you put the new DNS
>option information in the RA.
>
>With DHCPv6 Light for DNS option configuration, how is the client told
>that DNS options have changed?  The reconfigure message seems to be
>unicast to the clients, but if the DHCPv6 server is stateless, it won't
>have a list of clients (with leased IPs) to send that Reconfigure
>message to?
>
>Is this a general problem for any options set by a host that only uses 
>stateless DHCPv6 for options, and use RFC2462 for addresses.
>
>One option for passing the new DNS options from the DHCPv6 Light server
>to the client is a multicast Reconfigure message.    That would work 
>if the DHCPv6 Light server is on link, but if relays are used and there
>is no multicast routing on site, this seems to be a gap (and a case for the 
>RA method - though of course with RA method you still need to reconfigure 
>the router for the new RA...)
>
>Thoughts?
>
>Tim
>
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>
>  
>

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Re: [dhcwg] Renumbering DNS with stateless DHCPv6 - bug?