BGP for Communications among Controllers
draft-chen-idr-com-cntlrs-02

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Last updated 2017-07-20
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IDR Working Group                                                H. Chen
Internet-Draft                                                  S. Hares
Intended status: Standards Track                     Huawei Technologies
Expires: January 21, 2018                                        Y. Yang
                                                                Sockrate
                                                                  Y. Fan
                                                      Casa Systems, Inc.
                                                                  M. Toy
                                                                 Verizon
                                                                   Z. Li
                                                            China Mobile
                                                                  L. Liu
                                                                 Fujitsu
                                                           July 20, 2017

                BGP for Communications among Controllers
                      draft-chen-idr-com-cntlrs-02

Abstract

   This document describes extensions to the BGP routing protocol for
   supporting communications among SDN controllers in a centralized
   control system, which comprises multiple SDN controllers controlling
   a network with a number of domains.

Status of This Memo

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   This Internet-Draft will expire on January 21, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Chen, et al.            Expires January 21, 2018                [Page 1]
Internet-Draft                IDR-M-CTRLRs                     July 2017

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Chen, et al.            Expires January 21, 2018                [Page 2]
Internet-Draft                IDR-M-CTRLRs                     July 2017

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Conventions Used in This Document  . . . . . . . . . . . . . .  6
   4.  Requirements . . . . . . . . . . . . . . . . . . . . . . . . .  6
   5.  Overview of SDN Control System . . . . . . . . . . . . . . . .  6
     5.1.  Hierarchical SDN Control System  . . . . . . . . . . . . .  6
     5.2.  Distributed SDN Control System . . . . . . . . . . . . . .  8
   6.  Extensions to BGP  . . . . . . . . . . . . . . . . . . . . . . 10
     6.1.  Capability and Controller Discovery  . . . . . . . . . . . 10
       6.1.1.  Capability Discovery . . . . . . . . . . . . . . . . . 10
       6.1.2.  Controller Relation Discovery  . . . . . . . . . . . . 11
     6.2.  Messages for SDN Control System  . . . . . . . . . . . . . 14
       6.2.1.  Overview of Messages . . . . . . . . . . . . . . . . . 14
       6.2.2.  Messages for Hierarchical SDN Control System . . . . . 17
       6.2.3.  Messages for Distributed SDN Control System  . . . . . 24
     6.3.  Connections and Accesses Advertisement . . . . . . . . . . 29
       6.3.1.  Advertisement in Hierarchical SDN Control System . . . 29
       6.3.2.  Advertisement in Distributed SDN Control System  . . . 30
     6.4.  Tunnel Creation  . . . . . . . . . . . . . . . . . . . . . 31
       6.4.1.  Tunnel Creation in Hierarchical SDN Control System . . 31
       6.4.2.  Tunnel Creation in Distributed SDN Control System  . . 35
     6.5.  Transporting SDN Information in BGP  . . . . . . . . . . . 39
       6.5.1.  TLV Format . . . . . . . . . . . . . . . . . . . . . . 39
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