This document describes an extension of the Stateless IP/ICMP
Translation for IPv6 Internet Data Center Environments (SIIT-DC)
architecture, which allows applications, protocols, or nodes that are
incompatible with IPv6 and/or Network Address Translation to operate
correctly with SIIT-DC. This is accomplished by introducing a new
component called an SIIT-DC Edge Relay, which reverses the
translations made by an SIIT-DC Border Relay. The application and/or
node is thus provided with seemingly native IPv4 connectivity that
provides end-to-end address transparency.
The reader is expected to be familiar with the SIIT-DC architecture
described in RFC 7755.