Redpill Linpro This document describes SIIT-DC, an extension to Stateless IP/ICMP Translation (SIIT) [RFC6145] that makes it ideally suited for use in IPv6 data centre environments. SIIT-DC simultaneously facilitates IPv6 deployment and IPv4 address conservation. The overall SIIT-DC architecture is described, as well as guidelines for operators. Finally, the normative implementation requirements are described, as a list of additions and changes to SIIT [RFC6145].