Virtual Transport Network (VTN) Scalability Considerations for Enhanced VPN
draft-dong-teas-enhanced-vpn-vtn-scalability-00
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TEAS working group J. Dong
Internet-Draft Z. Li
Intended status: Standard Track Huawei
Expires: August 2020 F. Qin
China Mobile
February 10, 2020
Virtual Transport Network (VTN) Scalability Considerations for
Enhanced VPN
draft-dong-teas-enhanced-vpn-vtn-scalability-00
Abstract
Enhanced VPN (VPN+) is an enhancement to VPN services to support the
needs of new applications, particularly including the applications
that are associated with 5G services. An enhanced VPN could be used
for transport network slicing in 5G, and will also be of use in more
generic scenarios. I-D.ietf-teas-enhanced-vpn describes the
framework and candidate component technologies for providing
enhanced VPN services. This document describes the scalability
considerations in the control plane and data plane to enable VPN+
services, some optimization mechanisms are also described.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six
months and may be updated, replaced, or obsoleted by other documents
at any time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 10, 2020.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Dong, et al. Expires August 10, 2020 [Page 1]
Internet-Draft VPN+ Scalability Considerations February 2020
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Table of Contents
1. Introduction ................................................ 2
2. Requirements Language........................................ 3
3. Scalability Requirement ..................................... 3
4. Scalability Considerations .................................. 5
4.1. Control Plane Scalability Considerations ............... 5
4.1.1. Distributed Control Plane ............................ 5
4.1.2. Centralized Control Plane ............................ 6
4.2. Data Plane Scalability Considerations .................. 6
4.3. Gap Analysis of Existing Mechanism ..................... 7
5. Possible Optimization ....................................... 7
5.1. Control Plane Optimization ............................. 7
5.2. Data Plane Optimization ................................ 9
6. Solution Evolution for Improved Scalability ................ 11
7. Security Considerations .................................... 11
IANA Considerations ........................................... 11
Acknowledgments ............................................... 11
References .................................................... 12
Normative References........................................ 12
Informative References ..................................... 12
Authors' Addresses ............................................ 13
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. The VPN service is provided with
two network layers: the overlay and the underlay. The underlay is
responsible for establishing the network connectivity and managing
network resources to meet the service requirement. The overlay is
used to distribute the membership and reachability information of
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