Stateless IP/ICMP Translation for IPv6 Internet Data Center Environments (SIIT-DC): Dual Translation Mode
RFC 7756
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Type |
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RFC - Informational
(February 2016; No errata)
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Last updated |
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2016-02-17
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Replaces |
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draft-anderson-v6ops-siit-dc-2xlat
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Stream |
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IETF
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Formats |
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plain text
pdf
html
bibtex
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WG state
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Submitted to IESG for Publication
Sep 2015
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Document shepherd |
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Fred Baker
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Shepherd write-up |
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Show
(last changed 2015-08-11)
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IESG state |
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RFC 7756 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Joel Jaeggli
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Send notices to |
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(None)
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| IANA |
IANA review state |
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IANA OK - No Actions Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) T. Anderson
Request for Comments: 7756 Redpill Linpro
Category: Informational S. Steffann
ISSN: 2070-1721 S.J.M. Steffann Consultancy
February 2016
Stateless IP/ICMP Translation for IPv6 Internet Data Center
Environments (SIIT-DC): Dual Translation Mode
Abstract
This document describes an extension of the Stateless IP/ICMP
Translation for IPv6 Internet Data Center Environments (SIIT-DC)
architecture, which allows applications, protocols, or nodes that are
incompatible with IPv6 and/or Network Address Translation to operate
correctly with SIIT-DC. This is accomplished by introducing a new
component called an SIIT-DC Edge Relay, which reverses the
translations made by an SIIT-DC Border Relay. The application and/or
node is thus provided with seemingly native IPv4 connectivity that
provides end-to-end address transparency.
The reader is expected to be familiar with the SIIT-DC architecture
described in RFC 7755.
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/rfc7756.
Anderson & Steffann Informational [Page 1]
RFC 7756 SIIT-DC: Dual Translation Mode February 2016
Copyright Notice
Copyright (c) 2016 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. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Edge Relay Description . . . . . . . . . . . . . . . . . . . 5
3.1. Node-Based Edge Relay . . . . . . . . . . . . . . . . . . 6
3.2. Network-Based Edge Relay . . . . . . . . . . . . . . . . 7
3.2.1. Edge Relay "on a Stick" . . . . . . . . . . . . . . . 8
3.2.2. Edge Relay That Bridges IPv6 Packets . . . . . . . . 9
4. Deployment Considerations . . . . . . . . . . . . . . . . . . 9
4.1. IPv6 Path MTU . . . . . . . . . . . . . . . . . . . . . . 9
4.2. IPv4 MTU . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3. IPv4 Identification Header . . . . . . . . . . . . . . . 10
5. Intra-IDC IPv4 Communication . . . . . . . . . . . . . . . . 10
5.1. Hairpinning by the SIIT-DC Border Relay . . . . . . . . . 11
5.2. Additional EAMs Configured in Edge Relay . . . . . . . . 12
6. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1. Normative References . . . . . . . . . . . . . . . . . . 14
7.2. Informative References . . . . . . . . . . . . . . . . . 14
Appendix A. Examples: Network-Based IPv4 Connectivity . . . . . 16
A.1. Subnet with IPv4 Service Addresses . . . . . . . . . . . 16
A.2. Subnet with Unrouted IPv4 Addresses . . . . . . . . . . . 16
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
Anderson & Steffann Informational [Page 2]
RFC 7756 SIIT-DC: Dual Translation Mode February 2016
1. Introduction
SIIT-DC [RFC7755] describes an architecture where IPv4-only users can
access IPv6-only services through a stateless translator called an
SIIT-DC Border Relay (BR). This approach has certain limitations,
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