This document updates RFC3315, the original DHCPv6 specification, incorporates a number of new mechanisms and extensions that were defined in the period since the publication RFC 3315, clarifies a number of items, and obsoletes RFC 3315 and five other supporting RFCs. A small number of mechanisms that were obsoleted, listed in Section 25, and the changes relative are summarized in Appendix A. As this document does not define a new protocol, or a significant different versions of the existing protocol, but rather documents, clarifies and consolidates a technology that is widely deployed in the Internet, there are no new operational or manageability considerations to be described or added. It's a very useful document for network operators, who should start using it as a reference instead of the the obsolete RFCs and errata as soon as it is published. This document is READY from an OPSDIR perspective.