Learn NAT64 PREFIX64s using PCP
draft-ietf-pcp-nat64-prefix64-02
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PCP Working Group M. Boucadair
Internet-Draft France Telecom
Intended status: Standards Track May 23, 2013
Expires: November 24, 2013
Learn NAT64 PREFIX64s using PCP
draft-ietf-pcp-nat64-prefix64-02
Abstract
This document defines a new PCP extension to learn the IPv6
prefix(es) used by a PCP-controlled NAT64 device to build
IPv4-embedded IPv6 addresses. This extension is needed for
successful communications when IPv4 addresses are used in referrals.
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 November 24, 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.
Boucadair Expires November 24, 2013 [Page 1]
Internet-Draft PCP & NAT64 May 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 2
3. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 2
3.1. Issues . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2.1. AAAA Synthesis by Stub-resolver . . . . . . . . . . . 3
3.2.2. Applications Referrals . . . . . . . . . . . . . . . 3
4. PREFIX64 Option . . . . . . . . . . . . . . . . . . . . . . . 4
4.1. Format . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.2. Behavior . . . . . . . . . . . . . . . . . . . . . . . . 5
5. Flow Examples . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1. TCP Session Initiated from an IPv6-only Host . . . . . . 6
5.2. SIP Flow Example . . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
7. Security Considerations . . . . . . . . . . . . . . . . . . . 10
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1. Normative References . . . . . . . . . . . . . . . . . . 10
9.2. Informative References . . . . . . . . . . . . . . . . . 11
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
This document defines a new PCP extension [RFC6887] to inform PCP
clients about the Pref64::/n [RFC6052] used by a PCP-controlled NAT64
device [RFC6146]. It does so by defining a new PREFIX64 option.
This extension is required to help establishing communications
between IPv6-only hosts and remote IPv4-only hosts.
Some illustration examples are provided in Section 5. Detailed
experiment results are available at
[I-D.boucadair-pcp-nat64-experiments].
The use of this PCP extension for NAT64 load balancing purposes
([I-D.zhang-behave-nat64-load-balancing]) is out of scope.
2. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
3. Problem Statement
Boucadair Expires November 24, 2013 [Page 2]
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3.1. Issues
This document proposes a deterministic solution to solve the
following issues:
o Learn the Pref64::/n used by an upstream NAT64 function. This is
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