IPv6-to-IPv6 Network Prefix Translation

This document describes a stateless, transport-agnostic IPv6-to-IPv6 Network Prefix Translation (NPTv6) function that provides the address independence benefit associated with IPv4-to-IPv4 NAT (NAPT44), and in addition provides a 1:1 relationship between addresses in the "inside" and "outside" prefixes, preserving end to end reachability at the network layer. Requirements Terminology