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Mobile IPv6 Fast Handovers
RFC 5568

Document type: RFC - Proposed Standard (July 2009; Errata)
Updated by RFC 7411
Obsoletes RFC 5268
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 5568 (Proposed Standard)
Responsible AD: Jari Arkko
Send notices to: mipshop-chairs@tools.ietf.org, draft-ietf-mipshop-rfc5268bis@tools.ietf.org

Network Working Group                                     R. Koodli, Ed.
Request for Comments: 5568                              Starent Networks
Obsoletes: 5268                                                July 2009
Category: Standards Track

                       Mobile IPv6 Fast Handovers

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.

   This document updates the packet formats for the Handover Initiate
   (HI) and Handover Acknowledge (HAck) messages to the Mobility Header
   Type.

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) 2009 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
   Provisions Relating to IETF Documents in effect on the date of
   publication of this document (http://trustee.ietf.org/license-info).
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

Koodli                      Standards Track                     [Page 1]
RFC 5568                  MIP6 Fast Handovers                  July 2009

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................4
   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 ...............................................12
   5. Other Considerations ...........................................16
      5.1. Handover Capability Exchange ..............................16
      5.2. Determining New Care-of Address ...........................16
      5.3. Prefix Management .........................................17
      5.4. Packet Loss ...............................................17
      5.5. DAD Handling ..............................................19
      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. New Mobility Header Messages ..............................26
           6.2.1. Inter - Access Router Messages .....................26
           6.2.2. Fast Binding Update (FBU) ..........................29
           6.2.3. Fast Binding Acknowledgment (FBack) ................31
      6.3. Unsolicited Neighbor Advertisement (UNA) ..................33
      6.4. New Options ...............................................34
           6.4.1. IP Address/Prefix Option ...........................34
           6.4.2. Mobility Header IP Address/Prefix Option ...........35
           6.4.3. Link-Layer Address (LLA) Option ....................36
           6.4.4. Mobility Header Link-Layer Address (MH-LLA)
                  Option .............................................37
           6.4.5. Binding Authorization Data for FMIPv6 (BADF) .......38
           6.4.6. Neighbor Advertisement Acknowledgment (NAACK) ......39
   7. Related Protocol and Device Considerations .....................40
   8. Evolution from and Compatibility with RFC 4068 .................40
   9. Configurable Parameters ........................................41

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