DHCP, Dynamic DNS, and IPv6

[Simon Hobson]

I wrote:

>But when people start rolling out IP6, I don't think it's reasonable 
>for that to require a complete overhaul of their IP4 DHCP setup for 
>DDNS to work. The very minimum I would have expected would be for 
>the V4 IP4 server to be capable of handling it's TXT records in a 
>manner compatible with the IP6 server without having to modify 
>clients

Reading that I think I've missed a bit - as in, having an update to 
the V4 server so it can do TXT records in a manner compatible with 
the V6 server. That would allow the issue to be dealt with by a 
server upgrade.

Is it possible for the V4 server to determine what the V6 ID would be 
from the information in the request packets ?

>  - OR for the IP6 server to have a backwards compatibility mode to 
>make it operate with an unmodified IP4 server.