SRv6 Deployment Consideration
draft-tian-spring-srv6-deployment-consideration-00

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Network Working Group                                            H. Tian
Internet-Draft                                                   F. Zhao
Intended status: Informational                                     CAICT
Expires: May 7, 2020                                              C. Xie
                                                           China Telecom
                                                                   T. Li
                                                                   J. Ma
                                                            China Unicom
                                                                 S. Peng
                                                                   Z. Li
                                                                 Y. Xiao
                                                     Huawei Technologies
                                                        November 4, 2019

                     SRv6 Deployment Consideration
           draft-tian-spring-srv6-deployment-consideration-00

Abstract

   SRv6 has significant advantages over SR-MPLS and has attracted more
   and more attention and interest from network operators and verticals.
   Smooth network migration towards SRv6 is a key focal point and this
   document provides network migration guidance and recommendations on
   solutions in various scenarios.  Deployment cases with SRv6 are also
   introduced.

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].

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   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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Tian, et al.               Expires May 7, 2020                  [Page 1]
Internet-Draft        SRv6 Deployment Consideration        November 2019

   This Internet-Draft will expire on May 7, 2020.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Advantages of SRv6  . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  IP Route Aggregation  . . . . . . . . . . . . . . . . . .   3
     2.2.  End-to-end Service Auto-start . . . . . . . . . . . . . .   4
     2.3.  On-Demand Upgrade . . . . . . . . . . . . . . . . . . . .   5
   3.  Incremental Deployment Guidance for SRv6 Migration  . . . . .   6
   4.  Migration Guidance for SRv6/SR-MPLS Co-existence Scenario . .   7
   5.  Deployment cases  . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  China Telecom Si'chuan  . . . . . . . . . . . . . . . . .   9
     5.2.  China Unicom  . . . . . . . . . . . . . . . . . . . . . .  10
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  11
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   SRv6 is the instantiation of Segment Routing deployed on the IPv6
   data plane[RFC8200].  Therefore, in order to support SRv6, the
   network must first be enabled for IPv6.  Over the past several years,
   IPv6 has been actively promoted all over the world, and the
   deployments of IPv6 have been ever-increasing which provides the
   basis for the deployments of SRv6.

   With IPv6 as its data plane, for network migration towards SRv6, both
   software and hardware need to be upgraded.  Compared with other new
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