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Distributed Mobility Managment Working Group                      D. Liu
Internet-Draft                                                   H. Deng
Updates: 5014 (if approved)                                 China Mobile
Intended status: Standards Track                           July 08, 2013
Expires: January 09, 2014


       Mobility API Extension for Distributed Mobility Management
                     draft-liu-dmm-mobility-api-01

Abstract

   [RFC5014] specifies extension to socket API to allow application to
   specify the preference among multiple source addresses.
   [I-D.draft-korhonen-6man-prfix-properties] and
   [I-D.draft-bhandari-dhc-class-based-prefix-04] propose to extend
   router advertisment to carry the prefix property and class
   information.  The mobile node can learn the prefix property and class
   information from the router advertisment message.  This document
   proposes an extension to [RFC5014] to enable the application to
   select the distributed mobility management related prefixes.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 09, 2014.









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Copyright Notice

   Copyright (c) 2013 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
   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 Simplified BSD License.

Table of Contents

   1.  Proposed Extension of RFC 5014  . . . . . . . . . . . . . . .   2
   2.  Usage Example . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   3
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Proposed Extension of RFC 5014

   [RFC5014]defines socket API extension used for IPv6 source address
   selection.  Application can use this API to override the default
   source address selection mechanism for IPv6.  Currently, [RFC5014]
   defines the following types of source address selection preference:

   IPV6_PREFER_SRC_HOME /* Prefer Home address as source */

   IPV6_PREFER_SRC_COA /* Prefer Care-of address as source */

   IPV6_PREFER_SRC_TMP /* Prefer Temporary address as source */

   IPV6_PREFER_SRC_PUBLIC /* Prefer Public address as source */

   IPV6_PREFER_SRC_CGA /* Prefer CGA address as source */

   IPV6_PREFER_SRC_NONCGA /* Prefer a non-CGA address as source */

   This document proposes to extend the above definition to add two new
   flags:



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   IPV6_PREFER_SRC_LOCAL_HNP:

   Prefer to use locally allocated home network prefix.

   IPV6_PREFER_SRC_REMOTE_HNP:

   Prefer to use the home network prefix that allocated by other access
   router instead of the one that the MN currently attach.

2.  Usage Example

   This section gives usage example for this API extension.

   [I-D.draft-ietf-dmm-best-practices-gap-analysis-01] and
   [I-D.draft-seite-dmm-dma-06] discuss the distributed mobility
   management practice.  It introduces dynamic anchoring concept: the
   mobile node can have multiple mobility anchor points and the mobile
   node select the locally allocated IP address for the newly started
   application for optimized routing.  The mobile node can continue to
   use the IP address allocated by previous anchor point for the on
   going session.  When the on going session terminate, the mobile node
   will release the previous anchor point allocated IP address.

   In the dynamic anchoring scenario, for the newly started application,
   it should use the IP address allocated by the local mobility anchor.
   The application can use IPV6_PREFER_SRC_LOCAL_HNP flag to select the
   local allocated IP address.  For the on going session, the
   application can use IPV6_PREFER_SRC_REMOTE_HNP flag to select the
   previous mobility anchor allocated home address to gurantee the
   session continuity.

3.  IANA Considerations

   This document makes no request of IANA.

   Note to RFC Editor: this section may be removed on publication as an
   RFC.

4.  Security Considerations

   TBD

5.  Acknowledgements

   TBD

6.  References




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6.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC5014]  Nordmark, E., Chakrabarti, S., and J. Laganier, "IPv6
              Socket API for Source Address Selection", RFC 5014,
              September 2007.

6.2.  Informative References

   [I-D.draft-bhandari-dhc-class-based-prefix-04]
              , "DHCPv6 class based prefix ", draft-bhandari-dhc-class-
              based-prefix-04 (work in progress), February 2013.

   [I-D.draft-ietf-dmm-best-practices-gap-analysis-01]
              , "Distributed Mobility Management: Current practices and
              gap analysis ", draft-ietf-dmm-best-practices-gap-
              analysis-01 (work in progress), June 2013.

   [I-D.draft-korhonen-6man-prfix-properties]
              , "IPv6 Prefix Properties", draft-korhonen-6man-prfix-
              properties (work in progress), February 2013.

   [I-D.draft-seite-dmm-dma-06]
              , "Distributed Mobility Anchoring", draft-seite-dmm-dma-06
              (work in progress), January 2013.

Authors' Addresses

   Dapeng Liu
   China Mobile
   32 Xuanwumen West Street
   Beijng, Xicheng District  100053
   China

   Phone: +86-13911788933
   Email: liudapeng@chinamobile.com


   Hui Deng
   China Mobile
   32 Xuanwumen West Street
   Beijng, Xicheng District  100053
   China

   Email: denghui@chinamobile.com




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