Carrying Virtual Transport Network Identifier in IPv6 Extension Header
draft-dong-6man-enhanced-vpn-vtn-id-01
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Jie Dong
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Zhenbin Li
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Chongfeng Xie
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Chenhao Ma
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2020-07-13
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Network Working Group J. Dong
Internet-Draft Z. Li
Intended status: Standards Track Huawei Technologies
Expires: January 14, 2021 C. Xie
C. Ma
China Telecom
July 13, 2020
Carrying Virtual Transport Network Identifier in IPv6 Extension Header
draft-dong-6man-enhanced-vpn-vtn-id-01
Abstract
This document proposes a new option type to carry virtual transport
network identifier (VTN ID) in the IPv6 extensions headers to
identify the Virtual Transport Network (VTN) the packet belongs to.
The procedure of processing the VTN option is also specified. This
provides a scalable solution for data plane encapsulation of enhanced
VPN (VPN+) as described in I-D.ietf-teas-enhanced-vpn. One typical
use case of VPN+ is to provide transport network slicing in 5G, while
it could also be used in more general cases.
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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Drafts is at https://datatracker.ietf.org/drafts/current/.
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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 January 14, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
Dong, et al. Expires January 14, 2021 [Page 1]
Internet-Draft IPv6 VTN Option July 2020
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. New IPv6 Extension Header Option for VTN . . . . . . . . . . 3
4. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.1. VTN Option Insertion . . . . . . . . . . . . . . . . . . 4
4.2. VTN based Packet Forwarding . . . . . . . . . . . . . . . 4
5. Operational Considerations . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. Security Considerations . . . . . . . . . . . . . . . . . . . 5
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 5
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
10.1. Normative References . . . . . . . . . . . . . . . . . . 6
10.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
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. Some customers may request a
connectivity services with advanced characteristics such as complete
isolation from other services or guaranteed performance. These
services are "enhanced VPNs" (known as VPN+).
[I-D.ietf-teas-enhanced-vpn] describes the framework and candidate
component technologies for providing enhanced VPN services. One
typical use case of VPN+ is to provide transport network slicing in
5G, while it could also be used in more general cases.
The enhanced properties of VPN+ require tighter coordination and
integration between the underlay network resources and the overlay
network. VPN+ service is built on a Virtual Transport Network (VTN)
which has a customized network topology and a set of dedicated or
shared network resources allocated from the underlay network. The
overlay VPN together with the corresponding VTN in the underlay
provide the VPN+ service. In the network, traffic of different VPN+
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