Path Table based Routing Mechanism in Software-Defined Optical Transport Networks (SD-OTN)
draft-li-sdnrg-path-table-routing-in-sd-otn-01

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SDNRG                                                           X. Li
Internet Draft                                                Y. Zhou
Intended status: Informational                                   BUPT
Expires: April 2017                                           D. Wang
                                                              Z. Wang
                                                              J. Wang
                                                                  ZTE
                                                                W. Li
                                                               S. Yin
                                                             S. Huang
                                                                 BUPT
                                                     October 20, 2016

       Path Table based Routing Mechanism in Software-Defined Optical
                        Transport Networks (SD-OTN)
              draft-li-sdnrg-path-table-routing-in-sd-otn-01

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

Li, et al.            Expires April 20, 2017                [Page 1]
Internet-Draft  Path Table based Routing Mechanism in SD-OTN October 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
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Abstract

   The dynamic establishment and removal of an end-to-end light-path
   consume a lot of time which are also the main burden of control plane
   in optical transport networks. With the frequent arrival and
   departure of services, the control plane needs to handle a large
   number of control and management messages to conduct path
   computation, resource reservation and cross connection configuration.
   This draft proposes a novel routing mechanism based on Path Table for
   software-defined optical transport networks (SD-OTN). The Path Table
   reserves partial activated established light-paths that can be
   directly used by subsequent requests for subsequent services. This
   new routing mechanism can reduce the network load and save routing
   time for some services.

Table of Contents

   1. Introduction ................................................ 3
   2. Conventions used in this document ........................... 3
   3. Motivation of Path Table based Routing Mechanism ............ 4
   4. Path Table based Routing Architecture ....................... 4
      4.1. Architecture ........................................... 5
      4.2. Path Table ............................................. 5
      4.3. Matching ............................................... 7
      4.4. Table-miss ............................................. 8
      4.5. Path Removal ........................................... 8
      4.6. Counters ............................................... 8
      4.7. Instructions ........................................... 9
   5. Security Considerations .................................... 10
   6. IANA Considerations ........................................ 10
   7. References ................................................. 10
      7.1. Normative References .................................. 10
   8. Acknowledgments ............................................ 10

Li, et al.            Expires April 20, 2017                [Page 2]
Internet-Draft  Path Table based Routing Mechanism in SD-OTN October 2016

1. Introduction

   This document describes the principle of Path Table based routing
   mechanism for software-defined optical transport networking (SD-OTN).
   With the development of bandwidth intensive applications such as
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