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TR 23.975 (SA2)
IPv6 migration guidelines

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(P) V14.0.0    2017/03    43 p.
(P) V13.0.0    2015/12    43 p.
(P) V12.0.0    2014/09    43 p.
(P) V11.0.0    2011/06    43 p.

Rapporteur:  Mr. Li, Lianyuan
See also:  –

With the depletion of IPv4 addresses and the development of data service, demands for deploying IPv6 are higher than before. This document analyzes different IPv6 migration scenarios and applicable mechanisms as well as identifies impacts on 3GPP network elements.

The technical report identifies various scenarios of transition to IPv6 and co-existence of IPv4 and IPv6, deployment options and impacts on 3GPP network elements. In particular:
  • Identify the transition and co-existence scenarios of interest for operators and the respective assumptions and requirements.
  • Analyze existing IP address allocation mechanism for IPv6 migration if necessary.
  • Investigate IPv6 transition mechanisms for the scenarios identified during the study and investigate their applicability for 3GPP network, and identify the compatibility among applicable transition mechanisms.
  • Identify any impact on 3GPP network elements.
  • Provide recommendations on IPv6 transition and co-existence of IPv4 and IPv6 and identify if any normative work is needed.


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1 Scope    2 References    3 Definitions, symbols and abbreviations    3.1 Definitions    3.2 Abbreviations    4 Baseline Architecture for IPv4 and IPv6 Co-existence    5 IPv6 migration scenarios    5.1 Scenario 1: Dual-stack connectivity with Limited Public IPv4 Address Pools    5.2 Scenario 2: Dual Stack connectivity with Limited Private IPv4 Address Pools    5.3 Scenario 3: UEs with IPv6-only connection and applications using IPv6    5.4 Scenario 4: IPv4 applications running on a Dual-stack host with an assigned IPv6 prefix and a shared IPv4 address and having to access IPv4 services    6 High level requirements    7 Solutions and functional flows description    7.1 Solution 1 - Dual-stack deployment combined with NAPT44    7.2 Transition Solution: Gateway-Initiated Dual-Stack Lite    7.3 Solution 3 - MS/UE IPv6-only deployment with stateful NAT64 support    8 Evaluation    9 Summary    10 Recommendations    A Reference Scenarios for NAT in the EPC    A.1 UE and AF In the same Address Realm    A.2 NAT between UE and AF    B Overview of Solutions for IPv6 Transition    B.1 Solution 1 - Dual-Stack Lite Architecture    B.2 Solution 2 - A+P architecture    B.3 Solution 3 - Protocol translation    B.4 Solution 4 - Per-interface NAT44    B.5 Void    B.6 Void    B.7 Solution 7 - BIH/NAT64    C Building Block: Dual-Stack EPS Bearer Contexts in EPS/GPRS    C.1 Description    C.2 Functional Description    C.3 Information flows    C.4 Applicability    D Change history   


1   Scope   PDF-p. 6
2   References
3   Definitions, symbols and abbreviations   PDF-p. 7
4   Baseline Architecture for IPv4 and IPv6 Co-existence
5   IPv6 migration scenarios   PDF-p. 10
6   High level requirements
7   Solutions and functional flows description
8   Evaluation
9   Summary
10   Recommendations
A   Reference Scenarios for NAT in the EPC   PDF-p. 23
B   Overview of Solutions for IPv6 Transition   PDF-p. 28
C   Building Block: Dual-Stack EPS Bearer Contexts in EPS/GPRS   PDF-p. 39
D   Change history   PDF-p. 41

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