Brian E Carpenter wrote: > I'm sorry, but *any* coexistence between RFC791-IPv4-only hosts and > hosts that are numbered out of an address space greater than 32 bits > requires some form of address sharing, Sure. > address mapping, and translation. Not at all. Realm Specific IP [RFC3102] is such an example without any mapping nor translations. Abstract of the RFC states: This document examines the general framework of Realm Specific IP (RSIP). RSIP is intended as a alternative to NAT in which the end- to-end integrity of packets is maintained. We focus on implementation issues, deployment scenarios, and interaction with other layer-three protocols. > It doesn't matter what choice we made back in 1994. Once you get to the > point where you've run out of 32 bit addresses and not every node can > support>32 bit addresses, you have the problem. The only problem is that some people misinterpret it that we had needed IPv6. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf