On 13/11/12 19:04, Jim Gettys wrote:
So the recursive DHCP-PD scheme strikes me as something possibly very fragile. I really, really don't want to repeat the experience I had with having extra DHCP servers, and I would guess few ISP's do either. It seems to me much more robust to flood the key configuration information (prefixes, DNS, NTP, and the like) via a protocol that is really designed for the job (whether specifically for configuration, ie. ahcp http://www.pps.univ-paris-diderot.fr/~jch/software/ahcp/, or via the hacks on routing protocols like Ari has done with OSPF).
Given that hosts are going to want to talk RA or DHCPv6, at least initially, one option down this route has the flood include the unicast address of a single, centralised DHCPv6 server, and routers run DHCP-relay agents which forward to that address. That gives you DHCPv6 functionality without recursive-PD complications. It also eliminates the problems of distributing the available prefixes as they traverse PD chains. The one-and-only DHCP server knows about all the prefixes delegated from the ISP and the relays know which particular prefix has been given to the local router by the routing protocol or AHCP.
Simon. _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
