SRv6 for Mobile User-Plane
draft-matsushima-spring-dmm-srv6-mobile-uplane-01

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SPRING and DMM                                             S. Matsushima
Internet-Draft                                                  SoftBank
Intended status: Standards Track                             C. Filsfils
Expires: January 18, 2018                            Cisco Systems, Inc.
                                                           July 17, 2017

                       SRv6 for Mobile User-Plane
           draft-matsushima-spring-dmm-srv6-mobile-uplane-01

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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Matsushima & Filsfils   Expires January 18, 2018                [Page 1]
Internet-Draft             SRv6-mobile-uplane                  July 2017

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   2
   3.  Motivations . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Mobile User-Plane . . . . . . . . . . . . . . . . . . . . . .   3
   5.  User-Plane Functions  . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Access Node Segment . . . . . . . . . . . . . . . . . . .   5
     5.2.  Layer-2 Anchor Segment  . . . . . . . . . . . . . . . . .   6
     5.3.  Layer-3 Anchor Segment  . . . . . . . . . . . . . . . . .   6
     5.4.  Stateless Interworking Segment  . . . . . . . . . . . . .   7
     5.5.  Rate Limit Segment  . . . . . . . . . . . . . . . . . . .   8
   6.  Network Slicing Considerations  . . . . . . . . . . . . . . .   8
   7.  Control Plane Considerations  . . . . . . . . . . . . . . . .   9
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     10.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

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
   roles of anchor of mobile user-plane.

2.  Conventions and Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
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