Architecture for Control Plane and User Plane Separated BNG
draft-cuspdt-rtgwg-cu-separation-bng-architecture-04

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INTERNET-DRAFT                                                     S. Hu
Intended status: Informational                                    F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 T. Chua
                                        Singapore Telecommunications Ltd
                                                                V. Lopez
                                                              Telefonica
                                                             D. Eastlake
                                                                 Z. Wang
                                                                 J. Song
                                                                  Huawei
Expires: September 10, 2019                               March 11, 2019

      Architecture for Control Plane and User Plane Separated BNG
        draft-cuspdt-rtgwg-cu-separation-bng-architecture-04.txt

Abstract

   This document defines an architecture for Broadband Network Gateway
   (BNG) devices with control plane (CP) and user plane (UP) separation.
   A BNG-CP is a user control management component while a BNG-UP takes
   responsibility as the network edge and user policy implementation
   component. Both BNG-CP and BNG-UP are core components for fixed
   broadband services and are deployed separately at different network
   layers.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   rtgwg@ietf.org.

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Hu, et al                                                       [Page 1]
INTERNET-DRAFT                         Architecture for CU Separated BNG

Table of Contents

      1. Introduction............................................3
      1.1 Motivation.............................................3

      2. Terminology.............................................4

      3. CU Separated BNG Architecture...........................5
      3.1 Internal Interfaces Between the CP and UP..............7

      4. Usage of the CU Separation BNG..........................8

      5. Security Considerations................................10
      6. IANA Considerations....................................10

      Normative References......................................11
      Informative References....................................11

      Authors' Addresses........................................12

Hu, et al                                                       [Page 2]
INTERNET-DRAFT                         Architecture for CU Separated BNG

1. Introduction

   A Broadband Network Gateway (BNG) device is defined as an Ethernet-
   centric IP edge router, and the aggregation point for user traffic.
   It performs Ethernet aggregation and packet forwarding via IP/MPLS,
   and supports user management, access protocols termination, QoS,
   policy management, etc.

   This document describes an architecture for BNG devices with control
   plane (CP) and user plane (UP) separation.  A BNG-CP is a user
   control management component while a BNG-UP takes responsibility as
   the network edge and user policy implementation components. Both BNG-
   CP and BNG- UP are core components for fixed broadband services and
   are deployed separately at different network layers in the network.

1.1 Motivation

   The rapid development of new services, such as 4K TV, IoT, etc., and
   increasing numbers of home broadband service users present some new
   challenges for BNGs such as:

   Low resource utilization: The traditional BNG acts as both a gateway
       for user access authentication and accounting and an IP network's
       Layer 3 edge. The mutually affecting nature of the tightly
       coupled control plane and forwarding plane makes it difficult to
       achieve the maximum performance of either plane.

   Complex management and maintenance: Due to the large numbers of
       traditional BNGs, configuring each device in a network is very
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