> IN ORDER TO AVOID v6 NAT: Network administrators of any home or > enterprise network need to have, at essentially zero cost, "ownership" > or control over SOME NUMBER of bits of the v6 address space, > sufficient to uniquely address each host in their network, and such > that a change in ISP or upstream topology (the higher-order address > bits) does not require reconfiguration of end-systems OR OF ANY > TRAFFIC-DISRUPTION-APPLIANCES THAT LIVE WITHIN THAT NETWORK... many of > which implement policy restrictions based on host IP addresses. > > pretty much agree, though I'm also fairly convinced that that SOME NUMBER == 128. in particular, I don't believe it's reasonable to expect applications to be aware of network topology or to use different kinds of addresses depending on the topology within which they will be used. pairwise address selection (selecting destination address based on source address or vice versa) is not sufficient. Keith _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf