IPv4 Residual Deployment via IPv6 - a Stateless Solution (4rd)
draft-ietf-softwire-4rd-06
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Internet Engineering Task Force R. Despres
Internet-Draft RD-IPtech
Intended status: Experimental S. Jiang, Ed.
Expires: January 12, 2014 Huawei Technologies Co., Ltd
R. Penno
Cisco Systems, Inc.
Y. Lee
Comcast
G. Chen
China Mobile
M. Chen
Freebit Co, Ltd.
July 11, 2013
IPv4 Residual Deployment via IPv6 - a Stateless Solution (4rd)
draft-ietf-softwire-4rd-06
Abstract
The 4rd automatic tunneling mechanism makes IPv4 Residual Deployment
possible via IPv6 networks without maintaining for this per-customer
states in 4rd-capable nodes (reverse of the IPv6 Rapid Deployment of
6rd). To cope with the IPv4 address shortage, customer sites can be
assigned shared public IPv4 addresses with restricted port sets. 4rd
can also support the scenarios that customer sites are assigned full
public IPv4 addresses or a set of public IPv4 addresses.
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 January 12, 2014.
Copyright Notice
Despres, et al. Expires January 12, 2014 [Page 1]
Internet-Draft Stateless IPv4 Residual Deployment (4rd) July 2013
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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. The 4rd Model . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Protocol Specifications . . . . . . . . . . . . . . . . . . . 7
4.1. NAT44 on CE . . . . . . . . . . . . . . . . . . . . . . . 7
4.2. Mapping rules and other Domain parameters . . . . . . . . 8
4.3. Reversible Packet Translations at Domain entries and
exits . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4. Address Mapping from CE IPv6 Prefixes to 4rd IPv4
prefixes . . . . . . . . . . . . . . . . . . . . . . . . 13
4.5. Address Mapping from 4rd IPv4 addresses to 4rd IPv6
Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6. Fragmentation Processing . . . . . . . . . . . . . . . . 19
4.6.1. Fragmentation at Domain Entry . . . . . . . . . . . . 19
4.6.2. Ports of Fragments addressed to Shared-Address CEs . 19
4.6.3. Packet Identifications from Shared-Address CEs . . . 21
4.7. TOS and Traffic-Class Processing . . . . . . . . . . . . 21
4.8. Tunnel-Generated ICMPv6 Error Messages . . . . . . . . . 22
4.9. Provisioning 4rd Parameters to CEs . . . . . . . . . . . 22
5. Security Considerations . . . . . . . . . . . . . . . . . . . 25
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
7. Relationship with Previous Works . . . . . . . . . . . . . . 26
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 27
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.1. Normative References . . . . . . . . . . . . . . . . . . 27
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