PCE Hierarchical SDNs
draft-chen-pce-h-sdns-01

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Last updated 2016-10-31
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PCE Working Group                                                H. Chen
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                  M. Toy
Expires: May 4, 2017
                                                                  L. Liu
                                                                 Fujitsu
                                                                  V. Liu
                                                            China Mobile
                                                        October 31, 2016

                         PCE Hierarchical SDNs
                        draft-chen-pce-h-sdns-01

Abstract

   This document presents extensions to the Path Computation Element
   Communication Protocol (PCEP) for supporting a hierarchical SDN
   control system, which comprises multiple SDN controllers controlling
   a network with a number of domains.

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

   This document is subject to BCP 78 and the IETF Trust's Legal
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Chen, et al.               Expires May 4, 2017                  [Page 1]
Internet-Draft                 PCE-H-SDNs                   October 2016

   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Conventions Used in This Document  . . . . . . . . . . . . . .  6
   4.  Requirements . . . . . . . . . . . . . . . . . . . . . . . . .  6
   5.  Overview of Hierarchical SDN Control System  . . . . . . . . .  6
   6.  Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . .  9
     6.1.  Capability Discovery . . . . . . . . . . . . . . . . . . .  9
     6.2.  New Messages for Hierarchical SDN Control System . . . . . 10
       6.2.1.  Contents of Messages . . . . . . . . . . . . . . . . . 12
       6.2.2.  Individual Encoding of Messages  . . . . . . . . . . . 24
       6.2.3.  Group Encoding of Messages . . . . . . . . . . . . . . 25
       6.2.4.  Embedded Encoding of Messages  . . . . . . . . . . . . 26
       6.2.5.  Mixed Encoding of Messages . . . . . . . . . . . . . . 27
     6.3.  Controller Relation Discovery  . . . . . . . . . . . . . . 27
       6.3.1.  Using Open Message . . . . . . . . . . . . . . . . . . 27
       6.3.2.  Using Discovery Message  . . . . . . . . . . . . . . . 29
     6.4.  Connections and Accesses Advertisement . . . . . . . . . . 30
     6.5.  Tunnel Creation  . . . . . . . . . . . . . . . . . . . . . 30
       6.5.1.  Computing Path in Two Rounds . . . . . . . . . . . . . 31
       6.5.2.  Computing Path in One Round  . . . . . . . . . . . . . 32
       6.5.3.  Creating Tunnel along Path . . . . . . . . . . . . . . 34
     6.6.  Objects and TLVs . . . . . . . . . . . . . . . . . . . . . 36
       6.6.1.  CRP Objects  . . . . . . . . . . . . . . . . . . . . . 36
       6.6.2.  LOCAL-CONTROLLER Object  . . . . . . . . . . . . . . . 37
       6.6.3.  REMOTE-CONTROLLER Object . . . . . . . . . . . . . . . 38
       6.6.4.  CONNECTION and ACCESS Object . . . . . . . . . . . . . 40
       6.6.5.  NODE Object  . . . . . . . . . . . . . . . . . . . . . 47
       6.6.6.  TUNNEL Object  . . . . . . . . . . . . . . . . . . . . 53
       6.6.7.  STATUS Object  . . . . . . . . . . . . . . . . . . . . 54
       6.6.8.  LABEL Object . . . . . . . . . . . . . . . . . . . . . 54
       6.6.9.  INTERFACE Object . . . . . . . . . . . . . . . . . . . 55
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 56
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