Carrying Virtual Transport Network Identifier in MPLS Packet
draft-li-mpls-enhanced-vpn-vtn-id-00

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Network Working Group                                              Z. Li
Internet-Draft                                                   J. Dong
Intended status: Standards Track                     Huawei Technologies
Expires: August 26, 2021                               February 22, 2021

      Carrying Virtual Transport Network Identifier in MPLS Packet
                  draft-li-mpls-enhanced-vpn-vtn-id-00

Abstract

   A Virtual Transport Network (VTN) is a virtual network which has a
   customized network topology and a set of dedicated or shared network
   resources allocated from the underlying network infrastructure.
   Multiple VTNs can be created by network operator for using as the
   underlay for one or a group of VPNs services to provide enhanced VPN
   (VPN+) services.  In packet forwarding, some fields in the data
   packet needs to be used to identify the VTN the packet belongs to, so
   that the VTN-specific processing can be executed.

   This document proposes a mechanism to carry the VTN-ID and the
   associated information in an MPLS packet to identify the VTN the
   packet belongs to.  The procedure for processing the VTN ID is also
   specified.

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
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   This Internet-Draft will expire on August 26, 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Li & Dong                Expires August 26, 2021                [Page 1]
Internet-Draft               VTN-ID in MPLS                February 2021

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Carrying VTN Information in MPLS Packet . . . . . . . . . . .   3
   4.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  VTN Header Insertion  . . . . . . . . . . . . . . . . . .   5
     4.2.  VTN based Packet Forwarding . . . . . . . . . . . . . . .   5
   5.  Capability Advertisement and Negotiation  . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Virtual Private Networks (VPNs) provide different groups of users
   with logically isolated connectivity over a common shared network
   infrastructure.  With the introduction of 5G, new service types may
   require connectivity services with advanced characteristics comparing
   to traditional VPNs, such as strict isolation from other services or
   guaranteed performance.  These services are refered to as "enhanced
   VPNs" (VPN+).  [I-D.ietf-teas-enhanced-vpn] describes a framework and
   candidate component technologies for providing VPN+ services.

   The enhanced properties of VPN+ require integration between the
   overlay connectivity and the characteristics provided by the underlay
   network.  To meet the requirement of enhanced VPN services, a number
   of Virtual Transport Networks (VTNs) need to be created, each
   consists of a subset of the underlay network topology and a set of
   network resources allocated from the underlay network to meet the
   requirement of one or a group of VPN+ services.  In the network,
   traffic of different VPN+ services may to be processed separately