Analysis of Solution Proposals for Hosts to Learn NAT64 Prefix
RFC 7051
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Type |
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RFC - Informational
(November 2013; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-korhonen-behave-nat64-learn-analysis
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Stream |
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IETF
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plain text
pdf
html
bibtex
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WG state
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WG Document
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Document shepherd |
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No shepherd assigned
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| IESG |
IESG state |
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RFC 7051 (Informational)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Martin Stiemerling
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IESG note |
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Dan Wing (dwing@cisco.com) is the document shepherd.
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Send notices to |
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(None)
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Internet Engineering Task Force (IETF) J. Korhonen, Ed.
Request for Comments: 7051 Broadcom
Category: Informational T. Savolainen, Ed.
ISSN: 2070-1721 Nokia
November 2013
Analysis of Solution Proposals for Hosts to Learn NAT64 Prefix
Abstract
Hosts and applications may benefit from learning if an IPv6 address
is synthesized and if NAT64 and DNS64 are present in a network. This
document analyzes all proposed solutions (known at the time of
writing) for communicating whether the synthesis is taking place,
what address format was used, and what IPv6 prefix was used by the
NAT64 and DNS64. These solutions enable both NAT64 avoidance and
local IPv6 address synthesis. The document concludes by recommending
the standardization of the approach based on heuristic discovery.
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/rfc7051.
Korhonen & Savolainen Informational [Page 1]
RFC 7051 Learning NAT64 Prefix November 2013
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
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 .....................................................4
3. Issues ..........................................................5
4. Background ......................................................6
5. Proposed Solutions to Learn about Synthesis and
Network-Specific Prefix .........................................7
5.1. DNS Query for a Well-Known Name ............................7
5.1.1. Solution Description ................................7
5.1.2. Analysis and Discussion .............................7
5.1.3. Summary .............................................8
5.2. EDNS0 Option Indicating AAAA Record Synthesis and Format ...8
5.2.1. Solution Description ................................8
5.2.2. Analysis and Discussion .............................9
5.2.3. Summary ............................................10
5.3. EDNS0 Flags Indicating AAAA Record Synthesis and Format ...10
5.3.1. Solution Description ...............................10
5.3.2. Analysis and Discussion ............................10
5.3.3. Summary ............................................11
5.4. DNS Resource Record for IPv4-Embedded IPv6 Address ........11
5.4.1. Solution Description ...............................11
5.4.2. Analysis and Discussion ............................12
5.4.3. Summary ............................................12
5.5. Learning the IPv6 Prefix of a Network's NAT64 Using DNS ...13
5.5.1. Solution Description ...............................13
5.5.2. Analysis and Discussion ............................13
5.5.3. Summary ............................................14
5.6. Learning the IPv6 Prefix of a Network's NAT64
Using DHCPv6 ..............................................14
5.6.1. Solution Description ...............................14
5.6.2. Analysis and Discussion ............................15
5.6.3. Summary ............................................15
Korhonen & Savolainen Informational [Page 2]
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