> Caitlin Bestler wrote: > IPv4 is silent on how the lower portion is formed. IPv6 > describes two techniques. Under IPv4 there is no reason > to presume that the same host will have the same network > identifier on multiple networks (other than the desire > of some network administrators to maintain some shred of > sanity). The method of generating the interface ID under > IPv6 would appear to be independent of the number of > identities that the network itself has. I still fail to see the relation with DNS. What is the point you are trying to make here? Michel.