Mobile IPv6 Fast Handovers
RFC 5268
Document | Type |
RFC - Proposed Standard
(June 2008; No errata)
Obsoleted by RFC 5568
Obsoletes RFC 4068
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---|---|---|---|
Author | Rajeev Koodli | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5268 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jari Arkko | ||
Send notices to | (None) |
Network Working Group R. Koodli, Ed. Request for Comments: 5268 Starent Networks Obsoletes: 4068 June 2008 Category: Standards Track Mobile IPv6 Fast Handovers 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. Abstract Mobile IPv6 enables a Mobile Node (MN) to maintain its connectivity to the Internet when moving from one Access Router to another, a process referred to as handover. During handover, there is a period during which the Mobile Node is unable to send or receive packets because of link switching delay and IP protocol operations. This "handover latency" resulting from standard Mobile IPv6 procedures, namely movement detection, new Care-of Address configuration, and Binding Update, is often unacceptable to real-time traffic such as Voice over IP (VoIP). Reducing the handover latency could be beneficial to non-real-time, throughput-sensitive applications as well. This document specifies a protocol to improve handover latency due to Mobile IPv6 procedures. This document does not address improving the link switching latency. Koodli, Ed. Standards Track [Page 1] RFC 5268 MIP6 Fast Handovers June 2008 Table of Contents 1. Introduction ....................................................3 2. Terminology .....................................................3 3. Protocol Overview ...............................................6 3.1. Addressing the Handover Latency ............................6 3.2. Protocol Operation .........................................8 3.3. Protocol Operation during Network-Initiated Handover ......11 4. Protocol Details ...............................................11 5. Other Considerations ...........................................15 5.1. Handover Capability Exchange ..............................15 5.2. Determining New Care-of Address ...........................16 5.3. Prefix Management .........................................16 5.4. Packet Loss ...............................................17 5.5. DAD Handling ..............................................18 5.6. Fast or Erroneous Movement ................................19 6. Message Formats ................................................20 6.1. New Neighborhood Discovery Messages .......................20 6.1.1. Router Solicitation for Proxy Advertisement (RtSolPr) ..........................................20 6.1.2. Proxy Router Advertisement (PrRtAdv) ...............22 6.2. Inter - Access Router Messages ............................25 6.2.1. Handover Initiate (HI) .............................25 6.2.2. Handover Acknowledge (HAck) ........................27 6.3. New Mobility Header Messages ..............................28 6.3.1. Fast Binding Update (FBU) ..........................28 6.3.2. Fast Binding Acknowledgment (FBack) ................30 6.4. Unsolicited Neighbor Advertisement (UNA) ..................31 6.5. New Options ...............................................32 6.5.1. IP Address/Prefix Option ...........................33 6.5.2. Link-Layer Address (LLA) Option ....................34 6.5.3. Mobility Header Link-Layer Address (MH-LLA) Option .............................................35 6.5.4. Binding Authorization Data for FMIPv6 (BADF) .......35 6.5.5. Neighbor Advertisement Acknowledgment (NAACK) ......36 7. Related Protocol and Device Considerations .....................37 8. Evolution from and Compatibility with RFC 4068 .................38 9. Configurable Parameters ........................................39 10. Security Considerations .......................................39 10.1. Peer Authorization Database Entries when Using IKEv2 .....41 10.2. Security Policy Database Entries .........................42 11. IANA Considerations ...........................................42 12. Acknowledgments ...............................................43 13. References ....................................................44 13.1. Normative References .....................................44 13.2. Informative References ...................................45 Appendix A. Contributors ..........................................46Show full document text