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Distributed Mobility Managment Working                            D. Liu
Group                                                            H. Deng
Internet-Draft                                              China Mobile
Intended status: Informational                             March 5, 2012
Expires: September 6, 2012


                     Mobility API Extension for DMM
                     draft-liu-dmm-mobility-api-00

Abstract


   RFC 5014 specifies extension to socket API to allow application to
   specify the preference among multiple source addresses.
   draft-liu-dmm-address-selection-00 proposes to extend router
   advertisment message to carry the prefix type information.  The
   mobile node can learn the prefix type information from the router
   advertisment message.  This document proposes an extension to RFC
   5014 to enable the application to select the DMM 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 September 6, 2012.

Copyright Notice

   Copyright (c) 2012 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



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   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.


Table of Contents

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






























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1.  Extension of RFC 5014

   RFC 5014 defines socket API extension used for source address
   selection.  Application can use this API to override the default
   source address selection mechnism for IPv6.  Currently, RFC 5014
   defines the following type 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:

   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.

   In DMM scenario, the application on the mobile node can always select
   the IPV6_PREFER_SRC_LOCAL_HNP as the most preferred soure address.
   The mobile node's operating system need to guarantee that for the on-
   going session, it will not interupt the on-going session even there
   is a new prefix available.


3.  IANA Considerations

   This document makes no request of IANA.

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



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   RFC.


4.  Security Considerations

   TBD


5.  Acknowledgements

   TBD


6.  References

6.1.  Normative References

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

6.2.  Informative References

   [I-D.draft-seite-dmm-dma-00]
              "Distributed Mobility Anchoring", February 2012.


Authors' Addresses

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

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















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

   Phone:
   Fax:
   Email: denghui@chinamobile.com
   URI:









































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