Requirements for Control Plane and User Plane Separated BNG Protocol
draft-cuspdt-rtgwg-cusp-requirements-02

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rtgwg                                                              S. Hu
Internet-Draft                                              China Mobile
Intended status: Informational                                  V. Lopez
Expires: January 3, 2019                                      Telefonica
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 T. Chua
                                    Singapore Telecommunications Limited
                                                                 M. Wang
                                                                 J. Song
                                                                  Huawei
                                                            July 2, 2018

  Requirements for Control Plane and User Plane Separated BNG Protocol
                draft-cuspdt-rtgwg-cusp-requirements-02

Abstract

   This document introduces the Control Plane and User Plane separated
   BNG architecture and defines a set of associated terminology.  What's
   more, this document focuses on defining a set of protocol
   requirements for the BNG-CP and BNG-UPs communication in the Control
   Plane and User Plane Separated BNG.

Status of This Memo

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   This Internet-Draft will expire on January 3, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Hu, et al.               Expires January 3, 2019                [Page 1]
Internet-Draft            Requirements for CUSP                July 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Concept and Terminology . . . . . . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  CU Separated BNG Model  . . . . . . . . . . . . . . . . . . .   3
     3.1.  Internal interfaces between the CP and UP . . . . . . . .   5
   4.  The usage of CU separation BNG protocol . . . . . . . . . . .   6
   5.  Control Plane and User Plane Separation Protocol Requirements   7
     5.1.  Transmit information tables . . . . . . . . . . . . . . .   7
     5.2.  Message Priority  . . . . . . . . . . . . . . . . . . . .   7
     5.3.  Reliability . . . . . . . . . . . . . . . . . . . . . . .   7
     5.4.  Support for Secure Communication  . . . . . . . . . . . .   8
     5.5.  Version negotiation . . . . . . . . . . . . . . . . . . .   8
     5.6.  Capability Exchange . . . . . . . . . . . . . . . . . . .   9
     5.7.  CP primary/backup capability  . . . . . . . . . . . . . .   9
     5.8.  Event Notification  . . . . . . . . . . . . . . . . . . .   9
     5.9.  Query Statistics  . . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   BNG is an Ethernet-centric IP edge router, and the aggregation point
   for the user traffic.  To provide centralized session management,
   flexible address allocation, high scalability for subscriber
   management capacity, and cost-efficient redundancy, the CU separated
   BNG is introduced [TR-384].  The CU separated Service Control Plane
   could be virtualized and centralized, which is responsible for user
   access authentication and setting forwarding entries to user planes.
   The routing control and forwarding plane, i.e. BNG user plane
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