Virtual Topologies for Service Chaining in BGP IP VPNs
draft-rfernando-l3vpn-service-chaining-02

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Last updated 2013-07-15
Replaced by draft-rfernando-bess-service-chaining
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INTERNET-DRAFT                                               R. Fernando
Intended Status: Standards track                                  D. Rao
Expires: January 14, 2014                                         L. Fang
                                                                   Cisco
                                                            M. Napierala
                                                                    AT&T
                                                                   N. So
                                                     Tata Communications

                                                       July 15, 2013

         Virtual Topologies for Service Chaining in BGP IP VPNs
               draft-rfernando-l3vpn-service-chaining-02         

Abstract

   This document presents techniques built upon BGP MPLS/VPN control
   plane mechanisms to construct virtual topologies for service chaining.
   These virtual service topologies interconnect network zones and constrain 
   the flow of traffic between these zones via a sequence of service nodes so
   that interesting service functions can be applied to such trafic.

   This document also describes both routing control plane and network 
   orchestration driven approaches to realize these virtual service topologies.

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Copyright and License Notice

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   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Intra-Zone Routing and Traffic Forwarding  . . . . . . . . . .  6
   3.  Inter-Zone Routing and Traffic Forwarding  . . . . . . . . . .  7
   4.  Proposed Inter-Zone Model  . . . . . . . . . . . . . . . . . .  8
     4.1  Constructing the Virtual Service Topology . . . . . . . . .  8
     4.2  Inter-zone Routing and Service Chaining . . . . . . . . . . 10
     4.3 Per-VM service chains  . . . . . . . . . . . . . . . . . . . 11
   5.  Routing Considerations . . . . . . . . . . . . . . . . . . . . 12
     5.1  Multiple service topologies . . . . . . . . . . . . . . . . 12
     5.2  Multipath . . . . . . . . . . . . . . . . . . . . . . . . . 12
     5.3  Supporting redundancy . . . . . . . . . . . . . . . . . . . 12
     5.4  Route Aggregation . . . . . . . . . . . . . . . . . . . . . 12
   6. Provisioning  . . . . . . . . . . . . . . . . . . . . . . . . . 12
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
   10.  References  . . . . . . . . . . . . . . . . . . . . . . . . . 14
     10.1  Normative References . . . . . . . . . . . . . . . . . . . 14
     10.2  Informative References . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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1.  Introduction

   Network topologies and routing design in enterprise, Data Center, and
   campus networks typically reflect the needs of the organization in
   terms of performance, scale, security and availability. For scale and
   security reasons, these networks may be composed of multiple small
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