Control and User Plane Seperation Architecture of Cloud based BNG
draft-gu-nfvrg-cloud-bng-architecture-00

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NFVRG                                                              R. Gu
Internet-Draft                                                     S. Hu
Intended status: Informational                              China Mobile
Expires: September 1, 2017                             February 28, 2017

   Control and User Plane Seperation Architecture of Cloud based BNG
                draft-gu-nfvrg-cloud-bng-architecture-00

Abstract

   This document defines the architecture of Clond-based BNG devices
   with control plane (CP) and user plane (UP) seperation.  Both BNG-CP
   and BNG-UP are core components for fixed broadband services and
   deployed seperately at different network layer.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Definition of terms . . . . . . . . . . . . . . . . . . . . .   2
   4.  Cloud-based BNG architecture  . . . . . . . . . . . . . . . .   3
   5.  Cloud_BNG use case  . . . . . . . . . . . . . . . . . . . . .   4
   6.  Cloud_BNG related interfaces  . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

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

   The basic idea of control plane and user plane seperation is to
   extract and centralize the user management function of multiple BNG
   devices forming a separate CP, while UP takes function as router CP
   and BNG forwarding plane.  Thus a BNG is constructed of CP and UP
   which is benefit in cloud-based BNG with the advantages of resource
   utilization improvement, resource control centralization, new service
   rapid provision and so on.

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

3.  Definition of terms

   AAA:Authentication Authorization Accounting

   BNG:Broadband Network Gateway

   CP:Control Plane

   DHCP:Dynamic Host Configuration Protocol

   MANO:Management and Orchestration

   NFV:Network Function Virtualization

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   PPPoE:Point to Point Protocol over Ethernet

   UP: User Plane

4.  Cloud-based BNG architecture

   There are two parts of functions in traditional BNG: one is user
   access management function, the other is router function.  While in
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