Network Working Group R. Wakikawa, Ed.
Request for Comments: 5648 Toyota ITC
Category: Standards Track V. Devarapalli
Wichorus
G. Tsirtsis
Qualcomm
T. Ernst
INRIA
K. Nagami
INTEC NetCore
October 2009
Multiple Care-of Addresses Registration
Abstract
According to the current Mobile IPv6 specification, a mobile node may
have several care-of addresses but only one, called the primary
care-of address, can be registered with its home agent and the
correspondent nodes. However, for matters of cost, bandwidth, delay,
etc, it is useful for the mobile node to get Internet access through
multiple accesses simultaneously, in which case the mobile node would
be configured with multiple active IPv6 care-of addresses. This
document proposes extensions to the Mobile IPv6 protocol to register
and use multiple care-of addresses. The extensions proposed in this
document can be used by mobile routers using the NEMO (Network
Mobility) Basic Support protocol as well.
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 and License 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
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
Wakikawa, et al. Standards Track [Page 1]RFC 5648 MCoA October 2009
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the BSD License.
Table of Contents
1. Introduction ....................................................3
2. Terminology .....................................................3
3. Protocol Overview ...............................................4
4. Mobile IPv6 Extensions .........................................10
4.1. Binding Cache Structure and Binding Update List ...........10
4.2. Binding Update Message ....................................10
4.3. Binding Identifier Mobility Option ........................11
4.4. New Status Values for Binding Acknowledgement .............13
5. Mobile Node Operation ..........................................14
5.1. Management of Care-of Address(es) and Binding
Identifier(s) .............................................14
5.2. Binding Registration ......................................15
5.3. Bulk Registration .........................................16
5.4. Binding De-Registration ...................................16
5.5. Returning Home with Complete Binding
De-Registration: Using a Single Interface .................17
5.5.1. Using Only the Interface Attached to the
Home Link ..........................................17
5.5.2. Using Only the Interface Attached to the
Visited Link .......................................17
5.6. Returning Home: Simultaneous Home and Visited Link
Operation .................................................18
5.6.1. Problems of Simultaneous Home and Foreign
Attachments ........................................18
5.6.2. Overview and Approach ..............................18
5.6.3. Home Binding Support ...............................19
5.6.4. Sending Packets from the Home Link .................20
5.6.5. Leaving from the Home Link .........................20
5.7. Receiving Binding Acknowledgement .........................21
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