Gateway Auto-Discovery and Route Advertisement for Segment Routing Enabled Data Center Interconnection
draft-drake-bess-datacenter-gateway-02

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Last updated 2016-10-16
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BESS Working Group                                              J. Drake
Internet-Draft                                                 A. Farrel
Intended status: Informational                                  E. Rosen
Expires: April 19, 2017                                 Juniper Networks
                                                                K. Patel
                                                            Arrcus, Inc.
                                                                L. Jalil
                                                                 Verizon
                                                        October 16, 2016

   Gateway Auto-Discovery and Route Advertisement for Segment Routing
                  Enabled Data Center Interconnection
                 draft-drake-bess-datacenter-gateway-02

Abstract

   Data centers have become critical components of the infrastructure
   used by network operators to provide services to their customers.
   Data centers are attached to the Internet or a backbone network by
   gateway routers.  One data center typically has more than one gateway
   for commercial, load balancing, and resiliency reasons.

   Segment routing is a popular protocol mechanism for operating within
   a data center, but also for steering traffic that flows between two
   data center sites.  In order that one data center site may load
   balance the traffic it sends to another data center site it needs to
   know the complete set of gateway routers at the remote data center,
   the points of connection from those gateways to the backbone network,
   and the connectivity across the backbone network.

   This document defines a mechanism using the BGP Tunnel Encapsulation
   attribute to allow each gateway router to advertise the routes to the
   prefixes in the data center site to which it provides access, and
   also to advertise on behalf of each other gateway to the same data
   center site.

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.

Drake, et al.            Expires April 19, 2017                 [Page 1]
Internet-Draft               SR DC Gateways                 October 2016

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Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  DC Gateway Auto-Discovery . . . . . . . . . . . . . . . . . .   5
   3.  Relationship to BGP Link State and Egress Peer Engineering  .   6
   4.  Advertising a DC Route Externally . . . . . . . . . . . . . .   6
   5.  Encapsulation . . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Manageability Considerations  . . . . . . . . . . . . . . . .   7
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9
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