Segment Routing for Enhanced VPN Service
draft-dong-spring-sr-for-enhanced-vpn-00

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Document Type Active Internet-Draft (individual)
Authors Jie Dong  , Stewart Bryant  , Zhenqiang Li  , Takuya Miyasaka 
Last updated 2018-03-05
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Network Working Group                                            J. Dong
Internet-Draft                                                 S. Bryant
Intended status: Standards Track                     Huawei Technologies
Expires: September 6, 2018                                         Z. Li
                                                            China Mobile
                                                             T. Miyasaka
                                                        KDDI Corporation
                                                           March 5, 2018

                Segment Routing for Enhanced VPN Service
                draft-dong-spring-sr-for-enhanced-vpn-00

Abstract

   Enhanced VPN (VPN+) is an enhancement to VPN technology to enable it
   to support the needs of new applications, particularly applications
   that are associated with 5G services.  These applications require
   better isolation and have more stringent performance requirements
   than can be provided with overlay VPNs.  The characteristics of an
   enhanced VPN as perceived by its tenant needs to be comparable to
   those of a dedicated private network.  This requires tight
   integration between the overlay VPN and the underlay network
   resources in a scalable manner.  An enhanced VPN may form the
   underpin of 5G network slicing, but will also be of use in its own
   right.  This document describes the use of segment routing based
   mechanisms to provide the enhanced VPN service with dedicated
   underlay network resources.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any

Dong, et al.            Expires September 6, 2018               [Page 1]
Internet-Draft                 SR for VPN+                    March 2018

   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 September 6, 2018.

Copyright Notice

   Copyright (c) 2018 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Segment Routing with Resource Reservation . . . . . . . . . .   3
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Topology and Resource Computation . . . . . . . . . . . .   5
     3.2.  Network Resource and SID Allocation . . . . . . . . . . .   5
     3.3.  Construction of Isolated Virtual Networks . . . . . . . .   5
     3.4.  VPN to Virtual Network Mapping  . . . . . . . . . . . . .   5
   4.  Benefits of SR based Mechanism  . . . . . . . . . . . . . . .   6
     4.1.  MPLS-TP . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  RSVP-TE . . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.3.  Classic SR  . . . . . . . . . . . . . . . . . . . . . . .   7
     4.4.  SR with Resource Reservation  . . . . . . . . . . . . . .   7
   5.  Service Assurance . . . . . . . . . . . . . . . . . . . . . .   8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   Driven largely by needs arising from the 5G mobile network design,
   the concept of network slicing has gained traction.  There is a need
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