Virtual Topologies for Service Chaining in BGP IP VPNs
draft-rfernando-l3vpn-service-chaining-00

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Last updated 2013-02-18
Replaced by draft-rfernando-bess-service-chaining
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INTERNET-DRAFT                                               R. Fernando
Intended Status: Standards track                                  D. Rao
Expires: August 18, 2013                                         L. Fang
                                                                   Cisco
                                                            M. Napierala
                                                                    AT&T
                                                                N. Bitar
                                                                 Verizon
                                                                   N. So
                                                     Tata Communications

                                                       February 18, 2013

         Virtual Topologies for Service Chaining in BGP IP VPNs
               draft-rfernando-l3vpn-service-chaining-00

Abstract

   This document presents the techniques built upon BGP/MPLS IP VPN
   control plane mechanisms to construct virtual service topologies for
   service chaining. These virtual service topologies allow a sequence
   of service nodes to be visited across multiple zones in a data center
   to form a service chain. The method uses service topology specific
   Route Targets (RTs) in addition to general purpose RTs. 

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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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
   5  Routing Considerations  . . . . . . . . . . . . . . . . . . . . 11
     5.1  Multiple service topologies . . . . . . . . . . . . . . . . 12
     5.2  Multipath . . . . . . . . . . . . . . . . . . . . . . . . . 12
     5.3  Supporting redundancy . . . . . . . . . . . . . . . . . . . 12
     5.4  Route Aggregation . . . . . . . . . . . . . . . . . . . . . 12
   6  Security Considerations . . . . . . . . . . . . . . . . . . . . 13
   7  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 13
   8  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 13
   9  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     9.1  Normative References  . . . . . . . . . . . . . . . . . . . 13
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13

 

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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
   domains or zones each serving one or more functions of the
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