Segment Routing IPv6 for Mobile User-Plane
draft-ietf-dmm-srv6-mobile-uplane-00

Document Type Active Internet-Draft (dmm WG)
Last updated 2017-11-30
Replaces draft-matsushima-spring-dmm-srv6-mobile-uplane
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SPRING and DMM                                             S. Matsushima
Internet-Draft                                                  SoftBank
Intended status: Standards Track                             C. Filsfils
Expires: June 3, 2018                                           M. Kohno
                                                     Cisco Systems, Inc.
                                                                D. Voyer
                                                             Bell Canada
                                                              C. Perkins
                                                               Futurewei
                                                       November 30, 2017

               Segment Routing IPv6 for Mobile User-Plane
                  draft-ietf-dmm-srv6-mobile-uplane-00

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.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on June 3, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   3
   3.  Motivations . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Mobile User-Plane . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Supporting Mobile User-Plane Functions  . . . . . . . . . . .   5
     5.1.  Access Point  . . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  Layer-2 Anchor  . . . . . . . . . . . . . . . . . . . . .   6
     5.3.  Layer-3 Anchor  . . . . . . . . . . . . . . . . . . . . .   6
     5.4.  Stateless Interworking  . . . . . . . . . . . . . . . . .   7
       5.4.1.  End.TM: End point function with encapsulation for
               mapped tunnel . . . . . . . . . . . . . . . . . . . .   7
       5.4.2.  T.Tmap: Transit behavior with tunnel decapsulation
               and mapping an SRv6 Policy  . . . . . . . . . . . . .   8
     5.5.  Rate Limit  . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Segment Routing IPv6 Functions and Behaviors by Use Cases . .   9
     6.1.  Basic Mode  . . . . . . . . . . . . . . . . . . . . . . .   9
       6.1.1.  Uplink  . . . . . . . . . . . . . . . . . . . . . . .  10
       6.1.2.  Downlink  . . . . . . . . . . . . . . . . . . . . . .  10
     6.2.  Aggregate Mode  . . . . . . . . . . . . . . . . . . . . .  11
       6.2.1.  Uplink  . . . . . . . . . . . . . . . . . . . . . . .  11
       6.2.2.  Downlink  . . . . . . . . . . . . . . . . . . . . . .  13
     6.3.  Stateless Interworking with Legacy Access Network . . . .  14
       6.3.1.  Uplink: Lagacy Access to SRv6 . . . . . . . . . . . .  14
       6.3.2.  Downlink: SRv6 to Legacy Access . . . . . . . . . . .  15
   7.  Network Slicing Considerations  . . . . . . . . . . . . . . .  16
   8.  Control Plane Considerations  . . . . . . . . . . . . . . . .  16
     8.1.  Existing Control Plane  . . . . . . . . . . . . . . . . .  16
     8.2.  Aggregate Mode  . . . . . . . . . . . . . . . . . . . . .  17
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