Segment Routing based Virtual Transport Network for Enhanced VPN
draft-dong-spring-sr-for-enhanced-vpn-10

Document Type Active Internet-Draft (individual)
Authors Jie Dong  , Stewart Bryant  , Takuya Miyasaka  , Yongqing Zhu  , Fengwei Qin  , Zhenqiang Li  , Francois Clad 
Last updated 2020-08-30
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SPRING Working Group                                             J. Dong
Internet-Draft                                       Huawei Technologies
Intended status: Informational                                 S. Bryant
Expires: March 4, 2021                            Futurewei Technologies
                                                             T. Miyasaka
                                                        KDDI Corporation
                                                                  Y. Zhu
                                                           China Telecom
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 F. Clad
                                                           Cisco Systems
                                                         August 31, 2020

    Segment Routing based Virtual Transport Network for Enhanced VPN
                draft-dong-spring-sr-for-enhanced-vpn-10

Abstract

   I-D.ietf-spring-resource-aware-segments describes the mechanism to
   associate network resource attributes to Segment Routing Identifiers
   (SIDs).  The resource-aware SIDs can be used to build SR paths with a
   set of reserved network resources.  In addition, the resource-aware
   SIDs can be used to build SR based virtual networks, which can be
   used as virtual underlay networks with the network topology and
   resource attributes required by different customers or services.
   Such virtual networks are called virtual transport networks (VTNs).
   This document describes the mechanism of using resource-aware SIDs to
   build SR based VTNs.

Status of This Memo

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   This Internet-Draft will expire on March 4, 2021.

Dong, et al.              Expires March 4, 2021                 [Page 1]
Internet-Draft                 SR for VPN+                   August 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Resource-Aware SIDs for VTN . . . . . . . . . . . . . . . . .   3
     2.1.  SR-MPLS . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  SRv6  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  VTN Topology and Resource Computation . . . . . . . . . .   5
     3.2.  VTN Network Resource and SID Allocation . . . . . . . . .   6
     3.3.  Construction of SR based VTNs . . . . . . . . . . . . . .   8
     3.4.  Mapping Service to SR based VTN . . . . . . . . . . . . .   9
     3.5.  VTN Visibility to Customer  . . . . . . . . . . . . . . .   9
   4.  Benefits of the Proposed Mechanism  . . . . . . . . . . . . .  10
   5.  Service Assurance . . . . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     10.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   Segment Routing (SR) [RFC8402] specifies a mechanism to steer packets
   through an ordered list of segments.  A segment is referred to by its
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