SRv6 Deployment Consideration
draft-tian-spring-srv6-deployment-consideration-03

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Last updated 2020-07-08
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Network Working Group                                            H. Tian
Internet-Draft                                                   F. Zhao
Intended status: Informational                                     CAICT
Expires: January 10, 2021                                         C. Xie
                                                           China Telecom
                                                                   T. Li
                                                                   J. Ma
                                                            China Unicom
                                                             R. Mwehaire
                                                         MTN Uganda Ltd.
                                                            E. Chingwena
                                                       MTN Group Limited
                                                            S. Peng, Ed.
                                                                   Z. Li
                                                                 Y. Xiao
                                                     Huawei Technologies
                                                            July 9, 2020

                     SRv6 Deployment Consideration
           draft-tian-spring-srv6-deployment-consideration-03

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 design and 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].

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

Tian, et al.            Expires January 10, 2021                [Page 1]
Internet-Draft        SRv6 Deployment Consideration            July 2020

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   This Internet-Draft will expire on January 10, 2021.

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   Copyright (c) 2020 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Advantages of SRv6  . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  IP Route Aggregation  . . . . . . . . . . . . . . . . . .   4
     2.2.  End-to-end Service Auto-start . . . . . . . . . . . . . .   5
     2.3.  On-Demand Upgrade . . . . . . . . . . . . . . . . . . . .   6
     2.4.  Simplified Service Deployment . . . . . . . . . . . . . .   7
       2.4.1.  Carrier's Carrier . . . . . . . . . . . . . . . . . .   7
       2.4.2.  LDP over TE . . . . . . . . . . . . . . . . . . . . .   8
   3.  Compatibility Challenges  . . . . . . . . . . . . . . . . . .   9
     3.1.  Fast Reroute (FRR)  . . . . . . . . . . . . . . . . . . .   9
     3.2.  Traffic Engineering (TE)  . . . . . . . . . . . . . . . .  10
     3.3.  Service Function Chaining (SFC) . . . . . . . . . . . . .  10
     3.4.  IOAM  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Solutions for mitigating the compatibility challenges . . . .  11
     4.1.  Traffic Engineering . . . . . . . . . . . . . . . . . . .  12
       4.1.1.  Binding SID (BSID)  . . . . . . . . . . . . . . . . .  12
       4.1.2.  PCEP FlowSpec . . . . . . . . . . . . . . . . . . . .  12
     4.2.  SFC . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
       4.2.1.  Stateless SFC . . . . . . . . . . . . . . . . . . . .  12
       4.2.2.  Stateful SFC  . . . . . . . . . . . . . . . . . . . .  13
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