--- 1/draft-ietf-dhc-dhcpv4-over-ipv6-05.txt 2013-04-11 14:19:19.960567050 +0100 +++ 2/draft-ietf-dhc-dhcpv4-over-ipv6-06.txt 2013-04-11 14:19:19.988567738 +0100 @@ -1,21 +1,21 @@ Network Working Group Y. Cui Internet-Draft P. Wu -Intended status: Standards Track J. Wu -Expires: March 20, 2013 Tsinghua University +Intended status: Informational J. Wu +Expires: September 21, 2013 Tsinghua University T. Lemon Nominum, Inc. - September 16, 2012 + March 20, 2013 DHCPv4 over IPv6 Transport - draft-ietf-dhc-dhcpv4-over-ipv6-05 + draft-ietf-dhc-dhcpv4-over-ipv6-06 Abstract In IPv6 networks, there remains a need to provide IPv4 service for some residual devices. This document describes a mechanism for allocating IPv4 addresses to such devices, using DHCPv4 with an IPv6 transport. It is done by putting a special relay agent function (Client Relay Agent) on the client side, as well as extending the behavior of the server; in the case where DHCP server only supports IPv4 transport, a relay agent is extended to support IPv6 transport @@ -31,25 +31,25 @@ Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." - This Internet-Draft will expire on March 20, 2013. + This Internet-Draft will expire on September 21, 2013. Copyright Notice - Copyright (c) 2012 IETF Trust and the persons identified as the + Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as @@ -104,22 +104,23 @@ document are to be interpreted as described in [RFC2119]. 3. Terminology This document makes use of the following terms: o DHCPv4: IPv4 Dynamic Host Configuration Protocol [RFC2131]. o Client Relay Agent(CRA): a special DHCPv4 Relay Agent which relays between DHCPv4 client and DHCPv4 server using an IPv6 network. A - CRA either sits on the same, IPv6-accessable host with the DHCPv4 - client, or sits on the same link with the host. + CRA either sits on the same, IPv6-accessible host with the DHCPv4 + client, or sits on the same link with the host running DHCPv4 + client. o Host Client Relay Agent(HCRA): a CRA which sits on the same, IPv6- accessible host with the DHCPv4 client. o On-Link Client Relay Agent(LCRA): a CRA which sits on the same link with the host that runs DHCPv4 client. o IPv6-Transport Server(TSV): a DHCPv4 Server that supports IPv6 transport. TSV listens on IPv6 for incoming DHCPv4 messages, and sends DHCPv4 messages in IPv6 packets. @@ -387,22 +388,22 @@ Email: danipko@microsoft.com 12. References 12.1. Normative References [I-D.ietf-dhc-client-id] Swamy, N., Halwasia, G., and S. Unit, "Client Identifier Option in DHCP Server Replies", - draft-ietf-dhc-client-id-05 (work in progress), - September 2012. + draft-ietf-dhc-client-id-07 (work in progress), + November 2012. [I-D.ietf-dhc-dhcpv4-relay-encapsulation] Lemon, T., Deng, H., and L. Huang, "Relay Agent Encapsulation for DHCPv4", draft-ietf-dhc-dhcpv4-relay-encapsulation-01 (work in progress), July 2011. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. @@ -424,22 +425,22 @@ Version Four (DHCPv4)", RFC 4361, February 2006. [RFC4925] Li, X., Dawkins, S., Ward, D., and A. Durand, "Softwire Problem Statement", RFC 4925, July 2007. 12.2. Informative References [I-D.ietf-softwire-public-4over6] Cui, Y., Wu, J., Wu, P., Vautrin, O., and Y. Lee, "Public IPv4 over IPv6 Access Network", - draft-ietf-softwire-public-4over6-03 (work in progress), - August 2012. + draft-ietf-softwire-public-4over6-05 (work in progress), + February 2013. Appendix A. Motivation for selecting this particular solution We considered three possible solutions to the problem of configuring IPv4 addresses on an IPv6 network. A.1. Configuring IPv4 with DHCPv6 Use DHCPv6 instead of DHCPv4, to provision IPv4-related connectivity. In DHCPv6, the provisioned IPv4 address can be embedded into IPv6