Separation of Control and User Plane for Proxy Mobile IPv6
RFC 7389
Internet Engineering Task Force (IETF) R. Wakikawa
Request for Comments: 7389 Softbank Mobile
Category: Standards Track R. Pazhyannur
ISSN: 2070-1721 S. Gundavelli
Cisco
C. Perkins
Futurewei Inc.
October 2014
Separation of Control and User Plane for Proxy Mobile IPv6
Abstract
This document specifies a method to split the control plane (CP) and
user plane (UP) for a network infrastructure based on Proxy Mobile
IPv6 (PMIPv6). Existing specifications allow a mobile access gateway
(MAG) to separate its control and user plane using the Alternate
Care-of Address mobility option for IPv6 or Alternate IPv4 Care-of
Address option for IPv4. However, the current specification does not
provide any mechanism allowing the local mobility anchor (LMA) to
perform an analogous functional split. To remedy that shortcoming,
this document specifies a mobility option enabling an LMA to provide
an alternate LMA address to be used for the bidirectional user-plane
traffic between the MAG and LMA. With this new option, an LMA will
be able to use an IP address for its user plane that is different
than the IP address used for the control plane.
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/rfc7389.
Wakikawa, et al. Standards Track [Page 1]
RFC 7389 PMIPv6 CP-UP Split October 2014
Copyright Notice
Copyright (c) 2014 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
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described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................2
2. Conventions and Terminology .....................................5
2.1. Conventions ................................................5
2.2. Terminology ................................................5
3. Additional Fields in Conceptual Data Structures .................6
4. LMA User-Plane Address Mobility Option ..........................6
5. Protocol Configuration Variable .................................8
6. IANA Considerations .............................................9
7. Security Considerations .........................................9
8. References .....................................................10
8.1. Normative References ......................................10
8.2. Informative References ....................................10
Acknowledgements ..................................................12
Authors' Addresses ................................................12
1. Introduction
A Proxy Mobile IPv6 (PMIPv6) infrastructure comprises two primary
entities: LMA (local mobility anchor) and MAG (mobile access
gateway). The interface between the MAG and LMA consists of the
control plane and user plane. The control plane is responsible for
signaling messages between the MAG and LMA, such as the Proxy Binding
Update (PBU) and Proxy Binding Acknowledgement (PBA) messages to
establish a mobility binding. In addition, the control-plane
components in the MAG and LMA are also responsible for setting up and
tearing down a bidirectional tunnel between the MAG and LMA. The
user plane is used for carrying the mobile node's IP traffic between
the MAG and the LMA over the bidirectional tunnel.
Wakikawa, et al. Standards Track [Page 2]
RFC 7389 PMIPv6 CP-UP Split October 2014
Widely deployed mobility management systems for wireless
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