Segment Routing IPv6 for Mobile User-Plane
draft-matsushima-spring-dmm-srv6-mobile-uplane-02

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SPRING and DMM                                             S. Matsushima
Internet-Draft                                                  SoftBank
Intended status: Standards Track                             C. Filsfils
Expires: May 3, 2018                                            M. Kohno
                                                     Cisco Systems, Inc.
                                                                D. Voyer
                                                             Bell Canada
                                                        October 30, 2017

               Segment Routing IPv6 for Mobile User-Plane
           draft-matsushima-spring-dmm-srv6-mobile-uplane-02

Abstract

   This document discusses the applicability of SRv6 (Segment Routing
   IPv6) to user-plane of mobile networks that SRv6 source routing
   capability with its programmability can fulfill the user-plane
   functions, such as access and anchor functions.  It takes advantage
   of underlying layer awareness and flexibility to deploy user-plane
   functions that enables optimizing data-path for applications.
   Network slicing and an interworking way between SRv6 and existing
   mobile user-plane are also discussed in this document.

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   This Internet-Draft will expire on May 3, 2018.

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   Copyright (c) 2017 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

Matsushima, et al.         Expires May 3, 2018                  [Page 1]
Internet-Draft             SRv6-mobile-uplane               October 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   3
   3.  Motivations . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Mobile User-Plane . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Segment Routing IPv6 for Mobile User-Plane Functions  . . . .   5
   6.  SRv6 Functions and Behaviors for User-Plane . . . . . . . . .   6
     6.1.  Per Session Segment for Basic User-Plane  . . . . . . . .   6
       6.1.1.  Uplink  . . . . . . . . . . . . . . . . . . . . . . .   6
       6.1.2.  Downlink  . . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  Aggregated Segment for Basic User-Plane . . . . . . . . .   8
       6.2.1.  Uplink  . . . . . . . . . . . . . . . . . . . . . . .   8
       6.2.2.  Downlink  . . . . . . . . . . . . . . . . . . . . . .   8
     6.3.  Stateless Interworking  . . . . . . . . . . . . . . . . .   9
     6.4.  Rate Limit Function . . . . . . . . . . . . . . . . . . .  10
   7.  Network Slicing Considerations  . . . . . . . . . . . . . . .  11
   8.  Control Plane Considerations  . . . . . . . . . . . . . . . .  11
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     11.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   In mobile networks, mobility management systems provide connectivity
   while mobile nodes move around.  While the control-plane of the
   system signals movements of a mobile node, user-plane establishes
   tunnel between the mobile node and anchor node over IP based backhaul
   and core networks.

   This document discusses the applicability of SRv6 (Segment Routing
   IPv6) to those mobile networks.  SRv6 provides source routing to
   networks where operators can explicitly indicate route for the
   packets from and to the mobile node.  SRv6 endpoint nodes act as
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