BGP Control Plane Extensions for Segment Routing based Service Chaining
draft-dawra-idr-bgp-sr-service-chaining-00

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Last updated 2017-10-30
Replaced by draft-dawra-idr-bgp-ls-sr-service-segments
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Inter-Domain Routing
Internet-Draft
Intended status: Standards Track                           G. Dawra, Ed.
Expires: May 3, 2018                                         C. Filsfils
                                                           Cisco Systems
                                                              D. Bernier
                                                             Bell Canada
                                                              H. Elmalky
                                                                Ericsson
                                                                   X. Xu
                                                                  Huawei
                                                                 F. Clad
                                                           Cisco Systems
                                                        October 30, 2017

BGP Control Plane Extensions for Segment Routing based Service Chaining
               draft-dawra-idr-bgp-sr-service-chaining-00

Abstract

   The BGP Control Plane for the SR service-chaining solution is
   consistent with the BGP Control Plane for the topological Segment
   Routing Traffic Engineering (SR-TE) solution.

   o  BGP Link-State(BGP-LS) address-family/sub-address-family[RFC7752]
      is used to discover service and topological characteristics from
      the network.

   o  SR-TE policies[I-D.ietf-idr-segment-routing-te-policy] instantiate
      source-routed policies that may mix service and topological
      segments.

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Dawra, et al.              Expires May 3, 2018                  [Page 1]
Internet-Draft            BGP CP for SR for SC              October 2017

   This Internet-Draft will expire on May 3, 2018.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  BGP-LS Extensions for Service Chaining  . . . . . . . . . . .   3
   3.  Illustration  . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Service Type Table  . . . . . . . . . . . . . . . . . . .   7
     4.2.  Segment routing function Identifier(SFI)  . . . . . . . .   7
   5.  Manageability Considerations  . . . . . . . . . . . . . . . .   8
   6.  Operational Considerations  . . . . . . . . . . . . . . . . .   8
     6.1.  Operations  . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Conclusions . . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     10.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Segments are introduced in the SR architecture
   [I-D.ietf-spring-segment-routing].  Segment Routing based Service
   chaining is well described in Section 6 of
   [I-D.clad-spring-segment-routing-service-chaining] document with an
   example network and services.

   Let's extend the example to add a Segment Routing Controller (SR-C)
   to the network, for the purpose of service discovery and SR policy
   instantiation.

Dawra, et al.              Expires May 3, 2018                  [Page 2]
Internet-Draft            BGP CP for SR for SC              October 2017

   Let's consider the network represented in Figure 1 below where:

   o  A and B are two end hosts using IPv4.
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