A Framework for Enhanced Virtual Private Network (VPN+) Services
draft-ietf-teas-enhanced-vpn-07
TEAS Working Group J. Dong
Internet-Draft Huawei
Intended status: Informational S. Bryant
Expires: August 14, 2021 Futurewei
Z. Li
China Mobile
T. Miyasaka
KDDI Corporation
Y. Lee
Samsung
February 10, 2021
A Framework for Enhanced Virtual Private Network (VPN+) Services
draft-ietf-teas-enhanced-vpn-07
Abstract
This document describes the framework for Enhanced Virtual Private
Network (VPN+) services. The purpose of enhanced VPNs is to support
the needs of new applications, particularly applications that are
associated with 5G services, by utilizing an approach that is based
on existing VPN and Traffic Engineering (TE) technologies and adds
characteristics that specific services require over and above
traditional VPNs.
Typically, VPN+ will be used to underpin network slicing, but could
also be of use in its own right providing enhanced connectivity
services between customer sites.
It is envisaged that enhanced VPNs will be delivered using a
combination of existing, modified, and new networking technologies.
This document provides an overview of relevant technologies and
identifies some areas for potential new work.
Compared to traditional VPNs, it is not envisaged that large numbers
of VPN+ services will be deployed in a network. In other word, it is
not intended that all existing VPNs supported by a network will use
VPN+ techniques.
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
Dong, et al. Expires August 14, 2021 [Page 1]
Internet-Draft VPN+ Framework February 2021
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
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 14, 2021.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Overview of the Requirements . . . . . . . . . . . . . . . . 6
3.1. Performance Guarantees . . . . . . . . . . . . . . . . . 6
3.2. Isolation between Enhanced VPN Services . . . . . . . . . 8
3.2.1. A Pragmatic Approach to Isolation . . . . . . . . . . 10
3.3. Integration . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.1. Abstraction . . . . . . . . . . . . . . . . . . . . . 11
3.4. Dynamic Changes . . . . . . . . . . . . . . . . . . . . . 12
3.5. Customized Control . . . . . . . . . . . . . . . . . . . 12
3.6. Applicability . . . . . . . . . . . . . . . . . . . . . . 13
3.7. Inter-Domain and Inter-Layer Network . . . . . . . . . . 13
4. Architecture of Enhanced VPNs . . . . . . . . . . . . . . . . 14
4.1. Layered Architecture . . . . . . . . . . . . . . . . . . 15
4.2. Multi-Point to Multi-Point (MP2MP) Connectivity . . . . . 18
4.3. Application Specific Data Types . . . . . . . . . . . . . 18
4.4. Scaling Considerations . . . . . . . . . . . . . . . . . 18
5. Candidate Technologies . . . . . . . . . . . . . . . . . . . 19
5.1. Layer-Two Data Plane . . . . . . . . . . . . . . . . . . 19
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