--- 1/draft-ietf-mboned-v4v6-mcast-ps-03.txt 2013-09-06 07:14:24.184934817 -0700 +++ 2/draft-ietf-mboned-v4v6-mcast-ps-04.txt 2013-09-06 07:14:24.224935836 -0700 @@ -1,50 +1,50 @@ MBONED Working Group C. Jacquenet Internet-Draft M. Boucadair Intended status: Informational France Telecom Orange -Expires: December 07, 2013 Y. Lee +Expires: March 10, 2014 Y. Lee Comcast J. Qin Cisco Systems T. Tsou Huawei Technologies (USA) Q. Sun China Telecom - June 05, 2013 + September 06, 2013 IPv4-IPv6 Multicast: Problem Statement and Use Cases - draft-ietf-mboned-v4v6-mcast-ps-03 + draft-ietf-mboned-v4v6-mcast-ps-04 Abstract - This document discusses issues and requirements raised by IPv4-IPv6 - multicast interconnection and co-existence scenarios. It also - discusses various multicast use cases which may occur during IPv6 - transitioning. + This document discusses issues and requirements raised by intra- + domain IPv4-IPv6 multicast interconnection and co-existence + scenarios. It also discusses various multicast use cases which may + occur during IPv6 transitioning. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. 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 December 07, 2013. + This Internet-Draft will expire on March 10, 2014. Copyright Notice 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 @@ -100,23 +100,23 @@ example, the observed evolution of ADSL broadband access infrastructures from a service-specific, multi-PVC (Permanent Virtual Circuit) scheme towards a "service-agnostic", single PVC scheme, assumes the allocation of a globally unique IPv4 address on the WAN (Wide Area Network) interface of the CPE (Customer Premises Equipment), or to a mobile terminal), whatever the number and the nature of the services the customer has subscribed to. Likewise, the global IPv4 address depletion encourages the development of IPv6 receivers while contents may very well remain - IPv4-formatted. There is therefore a need to make sure such IPv6 - receivers can access IPv4-formatted contents during the transition - period. + IPv4-formatted, i.e., sourced by an IPv4 application. There is + therefore a need to make sure such IPv6 receivers can access + IPv4-formatted contents during the transition period. During the transition period, the usage of the remaining global IPv4 address blocks will have to be rationalized for the sake of IPv4 service continuity. The current state-of-the-art suggests the introduction of NAT (Network Address Translation) capabilities (generally denoted as CGN, for Carrier-Grade NAT) in providers' networks, so that a global IPv4 address will be shared between several customers. As a consequence, CPE or mobile UE (User Equipment) devices will no