SRv6 and MPLS interworking
draft-agrawal-spring-srv6-mpls-interworking-00

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Last updated 2018-10-22
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SPRING                                                        S. Agrawal
Internet-Draft                                                    Z. Ali
Intended status: Standards Track                             C. Filsfils
Expires: April 25, 2019                                    Cisco Systems
                                                                D. Voyer
                                                             Bell Canada
                                                                G. Dawra
                                                                LinkedIn
                                                                   Z. Li
                                                     Huawei Technologies
                                                        October 22, 2018

                       SRv6 and MPLS interworking
             draft-agrawal-spring-srv6-mpls-interworking-00

Abstract

   This document describes SRv6 and MPLS/SR-MPLS interworking and co-
   existence procedures.

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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   This Internet-Draft will expire on April 25, 2019.

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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
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interworking Procedures . . . . . . . . . . . . . . . . . . .   4
   3.  Building blocks      for domain stitching . . . . . . . . . .   5
     3.1.  Stitching heterogenous domains using a Controller . . . .   5
       3.1.1.  Illustration  . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Stitching heterogenous domains usin BGP inter domain
           routing . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.3.  6toM and Mto6 considerations  . . . . . . . . . . . . . .   7
   4.  FRR handling  . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Migration and co-existence  . . . . . . . . . . . . . . . . .   8
   6.  BGP based services interworking and migration . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   10. Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Many of the deployments require SRv6 insertion in the brownfield
   networks.  The incremental deployment of SRv6 into existing networks
   require SRv6 to interwork and co-exist with SR-MPLS/ MPLS.

   There are various SRv6 and SR-MPLS/ MPLS interworking scenarios
   possible.  They can be classified into the following four categories.

   o  SRv6 over SR MPLS/ MPLS (6oM)

   o  SR MPLS/ MPLS over SRv6 (Mo6)

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   o  SRv6 to SR-MPLS/ MPLS (6toM)

   o  SR-MPLS/ MPLS to SRv6 (Mto6)

   These scenarios cover various cascading of SRv6/ MPLS network, e.g.,
   SR-MPLS/MPLS <-> SRv6 <-> SR-MPLS/MPLS <-> SRv6 <-> SR-MPLS/MPLS,
   etc.  The draft addresses all these possible interworking scenarios.

   In addition, the draft also addresses migration and coexistence of
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