Requirements for Control Plane and User Plane Separated BNG Protocol
draft-cuspdt-rtgwg-cusp-requirements-03

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rtgwg                                                              S. Hu
Internet-Draft                                              China Mobile
Intended status: Informational                                  V. Lopez
Expires: April 25, 2019                                       Telefonica
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 T. Chua
                                    Singapore Telecommunications Limited
                                                        Donald. Eastlake
                                                                 M. Wang
                                                                 J. Song
                                                                  Huawei
                                                        October 22, 2018

  Requirements for Control Plane and User Plane Separated BNG Protocol
                draft-cuspdt-rtgwg-cusp-requirements-03

Abstract

   This document introduces the Control Plane and User Plane separated
   BNG (Broadband Network Gateway) architecture and defines a set of
   associated terminology.  It also specifies a set of protocol
   requirements for communication between the BNG-CP and the BNG-UPs in
   the Control Plane and User Plane Separated BNG.

Status of This Memo

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   This Internet-Draft will expire on April 25, 2019.

Hu, et al.               Expires April 25, 2019                 [Page 1]
Internet-Draft            Requirements for CUSP             October 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.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   A Broadband Network Gateway (BNG) is an Ethernet-centric IP edge
   router and the aggregation point for 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
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