Enhanced Route Optimization for Mobile IPv6
RFC 4866
Network Working Group J. Arkko
Request for Comments: 4866 Ericsson Research NomadicLab
Category: Standards Track C. Vogt
Universitaet Karlsruhe (TH)
W. Haddad
Ericsson Research
May 2007
Enhanced Route Optimization for Mobile IPv6
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This document specifies an enhanced version of Mobile IPv6 route
optimization, providing lower handoff delays, increased security, and
reduced signaling overhead.
Table of Contents
1. Introduction ....................................................3
2. Objectives ......................................................4
2.1. Handoff Latency ............................................5
2.2. Security ...................................................5
2.3. Signaling Overhead .........................................7
3. Protocol Design .................................................7
3.1. Cryptographically Generated Home Addresses .................7
3.2. Non-Cryptographic Care-of Addresses ........................8
3.3. Semi-Permanent Security Associations .......................8
3.4. Initial Home Address Tests .................................8
3.5. Concurrent Care-of Address Tests ...........................9
3.6. Credit-Based Authorization .................................9
3.7. Parallel Home and Correspondent Registrations .............10
4. Protocol Operation .............................................10
4.1. Sending Binding Update Messages ...........................10
4.2. Receiving Binding Update Messages .........................18
4.3. Sending Binding Acknowledgment Messages ...................22
Arkko, et al. Standards Track [Page 1]
RFC 4866 Enhanced Route Optimization May 2007
4.4. Receiving Binding Acknowledgment Messages .................23
4.5. Sending CGA Parameters ....................................25
4.6. Receiving CGA Parameters ..................................26
4.7. Sending Permanent Home Keygen Tokens ......................27
4.8. Receiving Permanent Home Keygen Tokens ....................28
4.9. Renewing Permanent Home Keygen Tokens .....................28
4.10. Handling Payload Packets .................................28
4.11. Credit Aging .............................................31
4.12. Simultaneous Movements ...................................32
5. Option Formats and Status Codes ................................32
5.1. CGA Parameters Option .....................................32
5.2. Signature Option ..........................................33
5.3. Permanent Home Keygen Token Option ........................34
5.4. Care-of Test Init Option ..................................35
5.5. Care-of Test Option .......................................35
5.6. CGA Parameters Request Option .............................36
5.7. Status Codes ..............................................36
6. Security Considerations ........................................38
6.1. Home Address Ownership ....................................39
6.2. Care-of Address Ownership .................................41
6.3. Credit-Based Authorization ................................43
6.4. Time Shifting Attacks .....................................46
6.5. Replay Attacks ............................................47
6.6. Resource Exhaustion .......................................47
6.7. IP Address Ownership of Correspondent Node ................47
7. Protocol Constants and Configuration Variables .................49
8. IANA Considerations ............................................50
9. Acknowledgments ................................................50
10. References ....................................................51
10.1. Normative References .....................................51
10.2. Informative References ...................................51
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