Scalability Considerations for Enhanced VPN (VPN+)
draft-dong-teas-enhanced-vpn-vtn-scalability-01

Document Type Active Internet-Draft (individual)
Authors Jie Dong  , Zhenbin Li  , Fengwei Qin  , Guangming Yang 
Last updated 2020-11-02
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TEAS Working Group                                               J. Dong
Internet-Draft                                                     Z. Li
Intended status: Informational                       Huawei Technologies
Expires: May 6, 2021                                              F. Qin
                                                            China Mobile
                                                                 G. Yang
                                                           China Telecom
                                                        November 2, 2020

           Scalability Considerations for Enhanced VPN (VPN+)
            draft-dong-teas-enhanced-vpn-vtn-scalability-01

Abstract

   Enhanced VPN (VPN+) aims to provide enhancements to existing VPN
   services to support the needs of new applications, particularly
   including the applications that are associated with 5G services.
   VPN+ could be used to provide network slicing in 5G, and may also be
   of use in more generic scenarios, such as enterprise services which
   have demanding requirement.  With the requirement for VPN+ services
   increase, scalability would become an important factor for deployment
   of VPN+.  This document describes the scalability considerations in
   the control plane and data plane to enable VPN+ services, some
   optimization mechanisms are also described.

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Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dong, et al.               Expires May 6, 2021                  [Page 1]
Internet-Draft       VPN+ Scalability Considerations       November 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  VPN+ Scalability Requirements . . . . . . . . . . . . . . . .   3
   3.  VPN+ Scalability Considerations . . . . . . . . . . . . . . .   4
     3.1.  Control Plane Scalability . . . . . . . . . . . . . . . .   5
       3.1.1.  Distributed Control Plane . . . . . . . . . . . . . .   5
       3.1.2.  Centralized Control Plane . . . . . . . . . . . . . .   5
     3.2.  Data Plane Scalability  . . . . . . . . . . . . . . . . .   6
     3.3.  Gap Analysis of Existing Mechanisms . . . . . . . . . . .   6
   4.  Possible Optimizations  . . . . . . . . . . . . . . . . . . .   7
     4.1.  Control Plane Optimization  . . . . . . . . . . . . . . .   7
     4.2.  Data Plane Optimization . . . . . . . . . . . . . . . . .   9
   5.  Solution Evolution for Improved Scalability . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  11
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  11
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     10.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Virtual Private Networks (VPNs) have served the industry well as a
   means of providing different groups of users with logically isolated
   connectivity over a common network infrastructure.  The VPN service
   is provided with two network layers: the overlay and the underlay.
   The underlay is responsible for establishing network connectivity and
   managing network resources to meet the service requirement.  The
   overlay is used to distribute the membership and reachability
   information of the tenants, and provide logical separation of service
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