> Caitlin Bestler wrote: > The potential mismatch between IPv6 and classic DNS > is that an IPv6 unicast address is structured in two > parts: the network identifier (the high 64 bits) and > an Interface ID (the low 64 bits). This is equally true for IPv4: The network part, whose bits are "1"s in the subnet mask, and the host part, whose bits are "0"s in the subnet mask. > Half of the Interface IDs are globally unique, the > other half are assigned locally within the network. I wonder where you got that from. The entire IID is assigned with EUI-64 and we just had a long thread on the ipv6 list about not using it for routing purposes. > For the half that are globally unique, a query system > could be defined to look up that address and return > the network(s) where it was found. This likely creates a circular reference: routing is required for DNS to work; therefore routing should not depend on DNS. Michel.