Internet Engineering Task Force (IETF) Y. Lee
Request for Comments: 6908 Comcast
Category: Informational R. Maglione
ISSN: 2070-1721 Cisco Systems
C. Williams
MCSR Labs
C. Jacquenet
M. Boucadair
France Telecom
March 2013
Deployment Considerations for Dual-Stack Lite
Abstract
This document discusses the deployment issues of and the requirements
for the deployment and operation of Dual-Stack Lite (DS-Lite). This
document describes the various deployment considerations and
applicability of the DS-Lite architecture.
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/rfc6908.
Lee, et al. Informational [Page 1]RFC 6908 Deployment Considerations for DS-Lite March 2013Copyright 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
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
described in the Simplified BSD License.
Table of Contents
1. Overview ........................................................3
2. AFTR Deployment Considerations ..................................3
2.1. Interface Consideration ....................................3
2.2. MTU and Fragmentation Considerations .......................4
2.3. Logging at the AFTR ........................................4
2.4. Blacklisting a Shared IPv4 Address .........................5
2.5. AFTR's Policies ............................................5
2.5.1. Outgoing Policy .....................................5
2.5.2. Incoming Policy .....................................6
2.6. AFTR Impacts on Accounting Process .........................6
2.7. Reliability Considerations of AFTR .........................7
2.8. Strategic Placement of AFTR ................................8
2.9. AFTR Considerations for Geographically Aware Services ......8
2.10. Impacts on QoS Policy .....................................9
2.11. Port Forwarding Considerations ............................9
2.12. DS-Lite Tunnel Security ..................................10
2.13. IPv6-Only Network Considerations .........................10
3. B4 Deployment Considerations ...................................10
3.1. DNS Deployment Considerations .............................11
3.2. IPv4 Service Monitoring ...................................11
3.2.1. B4 Remote Management ...............................11
3.2.2. IPv4 Connectivity Check ............................11
4. Security Considerations ........................................12
5. Acknowledgements ...............................................12
6. References .....................................................12
6.1. Normative References ......................................12
6.2. Informative References ....................................12
Lee, et al. Informational [Page 2]RFC 6908 Deployment Considerations for DS-Lite March 20131. Overview
DS-Lite [RFC6333] is a transition technique that enables operators to
datatracker.ietf.org