IPv4 Traffic Offload Selector Option for Proxy Mobile IPv6
RFC 6909
Internet Engineering Task Force (IETF) S. Gundavelli, Ed.
Request for Comments: 6909 Cisco
Category: Standards Track X. Zhou
ISSN: 2070-1721 ZTE Corporation
J. Korhonen
Renesas Mobile
G. Feige
R. Koodli
Cisco
April 2013
IPv4 Traffic Offload Selector Option for Proxy Mobile IPv6
Abstract
This specification defines a new mobility option, the IPv4 Traffic
Offload Selector option, for Proxy Mobile IPv6. This option can be
used by the local mobility anchor and the mobile access gateway for
negotiating IPv4 traffic offload policy for a mobility session.
Based on the negotiated IPv4 traffic offload policy, a mobile access
gateway can selectively offload some of the IPv4 traffic flows in the
access network instead of tunneling back to the local mobility anchor
in the home network.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6909.
Gundavelli, et al. Standards Track [Page 1]
RFC 6909 IPv4 Traffic Offload Selector Option April 2013
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction ....................................................2
2. Conventions and Terminology .....................................4
2.1. Conventions ................................................4
2.2. Terminology ................................................4
3. Solution Overview ...............................................4
3.1. IPv4 Traffic Offload Selector Option .......................6
3.2. MAG Considerations .........................................8
3.3. LMA Considerations .........................................9
4. Protocol Configuration Variables ...............................11
5. IANA Considerations ............................................11
6. Security Considerations ........................................12
7. Acknowledgements ...............................................12
8. References .....................................................13
8.1. Normative References ......................................13
8.2. Informative References ....................................13
1. Introduction
Mobile operators are expanding their network coverage by integrating
various access technology domains (e.g., Wireless LAN, CDMA, and
Long-Term Evolution (LTE)) into a common IP mobility core. The Third
Generation Partnership Project (3GPP) S2a Proxy Mobile IPv6 [TS23402]
reference point, specified by the 3GPP system architecture, defines
the protocol interworking for building such integrated multi-access
networks. In this scenario, the mobile node's IP traffic is always
tunneled back from the mobile access gateway [RFC5213] in the access
network to the local mobility anchor in the home network. Currently,
there is no mechanism for allowing some of the subscriber's IP flows
to be offloaded in the access network.
Gundavelli, et al. Standards Track [Page 2]
RFC 6909 IPv4 Traffic Offload Selector Option April 2013
With the exponential growth in mobile data traffic, mobile operators
are exploring new ways to offload some of the IP traffic flows at the
nearest access edge. The offload is intended either for local
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