Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN
draft-dong-spring-sr-for-enhanced-vpn-11

Document Type Active Internet-Draft (individual)
Authors Jie Dong  , Stewart Bryant  , Takuya Miyasaka  , Yongqing Zhu  , Fengwei Qin  , Zhenqiang Li  , Francois Clad 
Last updated 2020-11-02
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SPRING Working Group                                             J. Dong
Internet-Draft                                       Huawei Technologies
Intended status: Informational                                 S. Bryant
Expires: May 6, 2021                              Futurewei Technologies
                                                             T. Miyasaka
                                                        KDDI Corporation
                                                                  Y. Zhu
                                                           China Telecom
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 F. Clad
                                                           Cisco Systems
                                                        November 2, 2020

 Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN
                draft-dong-spring-sr-for-enhanced-vpn-11

Abstract

   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through an ordered list of instructions, called
   "segments".  A segment can represent topological or service based
   instructions.  A segment can further be associated with network
   resources allocated for executing the instruction.  Such a segment is
   called resource-aware SID.

   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 provide the
   customized network topology and resource attributes required by
   different customers or services.  Such virtual networks are called SR
   based Virtual Transport Networks (VTNs).  The SR based VTNs can be
   used to enable the enhanced VPN (VPN+) services.  This document
   describes the mechanisms of using resource-aware SIDs to build SR
   based VTNs.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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Dong, et al.               Expires May 6, 2021                  [Page 1]
Internet-Draft                 SR for VPN+                 November 2020

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on May 6, 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Resource-Aware SIDs for VTN . . . . . . . . . . . . . . . . .   3
     2.1.  SR-MPLS based VTN . . . . . . . . . . . . . . . . . . . .   4
     2.2.  SRv6 based VTN  . . . . . . . . . . . . . . . . . . . . .   4
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  VTN Topology and Resource Planning  . . . . . . . . . . .   6
     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 . . . . . . . . . . . . .  10
     3.5.  VTN Visibility to Customer  . . . . . . . . . . . . . . .  10
   4.  Benefits of the Proposed Mechanism  . . . . . . . . . . . . .  10
   5.  Service Assurance . . . . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  12
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