1. Introduction

1. Introduction

Section 5.3 of "IP/ICMP Translation Algorithm" [RFC6145] states that "the IPv6 addresses in the IPv6 header may not be IPv4-translatable addresses and there will be no corresponding IPv4 addresses representing this IPv6 address. In this case, the translator can do stateful translation. A mechanism by which the translator can instead do stateless translation of this address is left for future work." This document, "Stateless Source Address Mapping for ICMPv6 Packets", provides recommendations for this case.

For the purposes of this document, the term "IPv4-translatable IPv6 address" is as defined in Section 2.2 of [RFC6052].