Wireline Incremental IPv6
RFC 6782
Internet Engineering Task Force (IETF) V. Kuarsingh, Ed.
Request for Comments: 6782 Rogers Communications
Category: Informational L. Howard
ISSN: 2070-1721 Time Warner Cable
November 2012
Wireline Incremental IPv6
Abstract
Operators worldwide are in various stages of preparing for or
deploying IPv6 in their networks. These operators often face
difficult challenges related to IPv6 introduction, along with those
related to IPv4 run-out. Operators will need to meet the
simultaneous needs of IPv6 connectivity and continue support for IPv4
connectivity for legacy devices with a stagnant supply of IPv4
addresses. The IPv6 transition will take most networks from an IPv4-
only environment to an IPv6-dominant environment with long transition
periods varying by operator. This document helps provide a framework
for wireline providers who are faced with the challenges of
introducing IPv6 along with meeting the legacy needs of IPv4
connectivity, utilizing well-defined and commercially available IPv6
transition technologies.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6782.
Kuarsingh & Howard Informational [Page 1]
RFC 6782 Wireline Incremental IPv6 November 2012
Copyright Notice
Copyright (c) 2012 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
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include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Kuarsingh & Howard Informational [Page 2]
RFC 6782 Wireline Incremental IPv6 November 2012
Table of Contents
1. Introduction ....................................................4
2. Operator Assumptions ............................................4
3. Reasons and Considerations for a Phased Approach ................5
3.1. Relevance of IPv6 and IPv4 .................................6
3.2. IPv4 Resource Challenges ...................................6
3.3. IPv6 Introduction and Operational Maturity .................7
3.4. Service Management .........................................8
3.5. Suboptimal Operation of Transition Technologies ............8
3.6. Future IPv6 Network ........................................9
4. IPv6 Transition Technology Analysis .............................9
4.1. Automatic Tunneling Using 6to4 and Teredo .................10
4.2. Carrier-Grade NAT (NAT444) ................................10
4.3. 6rd .......................................................11
4.4. Native Dual Stack .........................................11
4.5. DS-Lite ...................................................12
4.6. NAT64 .....................................................12
5. IPv6 Transition Phases .........................................13
5.1. Phase 0 - Foundation ......................................13
5.1.1. Phase 0 - Foundation: Training .....................13
5.1.2. Phase 0 - Foundation: System Capabilities ..........14
5.1.3. Phase 0 - Foundation: Routing ......................14
5.1.4. Phase 0 - Foundation: Network Policy and Security ..15
5.1.5. Phase 0 - Foundation: Transition Architecture ......15
5.1.6. Phase 0 - Foundation: Tools and Management .........16
5.2. Phase 1 - Tunneled IPv6 ...................................16
5.2.1. 6rd Deployment Considerations ......................17
5.3. Phase 2 - Native Dual Stack ...............................19
5.3.1. Native Dual Stack Deployment Considerations ........20
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