Analysis of Multihoming in Network Mobility Support
RFC 4980
Document | Type | RFC - Informational (October 2007; No errata) | |
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Authors | Chan-Wah Ng , Eun Paik , Thierry Ernst , Marcelo Bagnulo | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4980 (Informational) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jari Arkko | ||
Send notices to | (None) |
Network Working Group C. Ng Request for Comments: 4980 Panasonic Singapore Labs Category: Informational T. Ernst INRIA E. Paik KT M. Bagnulo UC3M October 2007 Analysis of Multihoming in Network Mobility Support Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document is an analysis of multihoming in the context of network mobility (NEMO) in IPv6. As there are many situations in which mobile networks may be multihomed, a taxonomy is proposed to classify the possible configurations. The possible deployment scenarios of multihomed mobile networks are described together with the associated issues when network mobility is supported by RFC 3963 (NEMO Basic Support). Recommendations are offered on how to address these issues. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Classification . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1. (1,1,1): Single MR, Single HA, Single MNP . . . . . . . . 6 2.2. (1,1,n): Single MR, Single HA, Multiple MNPs . . . . . . . 6 2.3. (1,n,1): Single MR, Multiple HAs, Single MNP . . . . . . . 7 2.4. (1,n,n): Single MR, Multiple HAs, Multiple MNPs . . . . . 8 2.5. (n,1,1): Multiple MRs, Single HA, Single MNP . . . . . . . 8 2.6. (n,1,n): Multiple MRs, Single HA, Multiple MNPs . . . . . 9 2.7. (n,n,1): Multiple MRs, Multiple HAs, Single MNP . . . . . 9 2.8. (n,n,n): Multiple MRs, Multiple HAs, Multiple MNPs . . . . 10 Ng, et al. Informational [Page 1] RFC 4980 Analysis of Multihoming in NEMO October 2007 3. Deployment Scenarios and Prerequisites . . . . . . . . . . . . 11 3.1. Deployment Scenarios . . . . . . . . . . . . . . . . . . . 11 3.2. Prerequisites . . . . . . . . . . . . . . . . . . . . . . 13 4. Multihoming Issues . . . . . . . . . . . . . . . . . . . . . . 14 4.1. Fault Tolerance . . . . . . . . . . . . . . . . . . . . . 14 4.1.1. Failure Detection . . . . . . . . . . . . . . . . . . 15 4.1.2. Path Exploration . . . . . . . . . . . . . . . . . . . 16 4.1.3. Path Selection . . . . . . . . . . . . . . . . . . . . 17 4.1.4. Re-Homing . . . . . . . . . . . . . . . . . . . . . . 19 4.2. Ingress Filtering . . . . . . . . . . . . . . . . . . . . 19 4.3. HA Synchronization . . . . . . . . . . . . . . . . . . . . 21 4.4. MR Synchronization . . . . . . . . . . . . . . . . . . . . 22 4.5. Prefix Delegation . . . . . . . . . . . . . . . . . . . . 23 4.6. Multiple Bindings/Registrations . . . . . . . . . . . . . 23 4.7. Source Address Selection . . . . . . . . . . . . . . . . . 23 4.8. Loop Prevention in Nested Mobile Networks . . . . . . . . 24 4.9. Prefix Ownership . . . . . . . . . . . . . . . . . . . . . 24 4.10. Preference Settings . . . . . . . . . . . . . . . . . . . 25 5. Recommendations to the Working Group . . . . . . . . . . . . . 26 6. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . 28 7. Security Considerations . . . . . . . . . . . . . . . . . . . 28 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 29 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9.1. Normative References . . . . . . . . . . . . . . . . . . . 29 9.2. Informative References . . . . . . . . . . . . . . . . . . 29 Appendix A. Alternative Classifications Approach . . . . . . . . 32 A.1. Ownership-Oriented Approach . . . . . . . . . . . . . . . 32 A.1.1. ISP Model . . . . . . . . . . . . . . . . . . . . . . 32 A.1.2. Subscriber/Provider Model . . . . . . . . . . . . . . 33 A.2. Problem-Oriented Approach . . . . . . . . . . . . . . . . 34 Appendix B. Nested Tunneling for Fault Tolerance . . . . . . . . 35 B.1. Detecting Presence of Alternate Routes . . . . . . . . . . 35 B.2. Re-Establishment of Bi-Directional Tunnels . . . . . . . . 36 B.2.1. Using Alternate Egress Interface . . . . . . . . . . . 36 B.2.2. Using Alternate Mobile Router . . . . . . . . . . . . 36 B.3. To Avoid Tunneling Loop . . . . . . . . . . . . . . . . . 37 B.4. Points of Considerations . . . . . . . . . . . . . . . . . 37Show full document text