TJ wrote:
It is still the router, a piece of managed infrastructure sending out the information - not like we are encouraging hosts to make up their own prefix info here ... and hosts choosing the low-order bits shouldn't matter that much.
But that's the fatal flaw of autoconfiguration. "Hosts chosing the low-order bits" works great until either A) one of those hosts wants a semi-permanent name lodged in a DNS server and the IT guy wants to semi-permanently assign an IP address to it without having to touch the host configuration or B) the RIAA/MPAA/FBI/etc. comes and asks to see the logs which show which user on the subnet had a particular address and then goes to the local court and claims that you're using this newfangled protocol so as to avoid making information available that has "always" been available before. If *both* of these problems were fixed as well as DHCP fixes them for IPv4, there'd be a whole lot more support for letting the hosts choose their low-order bits. Matthew Kaufman