The Use Cases for Using PCE as the Central Controller(PCECC) of LSPs
draft-ietf-teas-pcecc-use-cases-01

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TEAS Working Group                                          Quintin Zhao
Internet-Draft                                                  Robin Li
Intended status: Informational                            Boris Khasanov
Expires: November 1, 2017                            Huawei Technologies
                                                                 King Ke
                                                    Tencent Holdings Ltd.
                                                             Luyuan Fang
                                                               Microsoft
                                                               Chao Zhou
                                                           Cisco Systems
                                                             Boris Zhang
                                                    Telus Communications
                                                        Artem Rachitskiy
                                                 Mobile TeleSystems JLLC   
                                                            Anton Gulida
                                                          LLC "Lifetech"
                                                       April 28, 2017

  The Use Cases for Using PCE as the Central Controller(PCECC) of LSPs
                   draft-ietf-teas-pcecc-use-cases-01 

Abstract

   In certain networks deployment scenarios, service providers would
   like to keep all the existing MPLS functionalities in both MPLS and
   GMPLS network while reducing existing complexity.In this document,
   we propose to use the PCE as a central controller so that LSP can be
   calculated/signaled/initiated/downloaded/managed through a
   centralized PCE server to each network devices along the LSP path
   while leveraging the existing PCE technologies as much as possible.

   This draft describes the use cases for using the PCE as the central
   controller where LSPs are calculated/setup/initiated/downloaded/
   maintained through extending the current PCE architectures and
   extending the PCEP.

   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 [RFC2119].
   
      
   Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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Zhao, et al.           Expires November 1, 2017               [Page 1]

Internet-Draft             Use Cases for PCECC            April 2017

   This Internet-Draft will expire on November 1, 2017.

Copyright Notice

   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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Use Cases of PCECC for Label Resource Reservations  . . . . .   3
   4.  Using PCECC for SR without the IGP Extension  . . . . . . . .   4
     4.1.  Use Cases of PCECC for SR Best Effort(BE) Path  . . . . .   5
     4.2.  Use Cases of PCECC for SR Traffic Engineering (TE) Path .   6
   5.  Use Cases of PCECC for TE LSP . . . . . . . . . . . . . . . .   7
     5.1 Use case of PCECC for load balancing  . . . . . . . . . . .   9
     5.2 PCECC and Inter-AS TE . . . . . . . . . . . . . . . . . . .  11         
   6.  Use Cases of PCECC for Multicast LSPs . . . . . . . . . . . .  13
     6.1  Using PCECC for P2MP/MP2MP LSPs' Setup  . . . . . . . . .   13
     6.2  Use Cases of PCECC for the Resiliency of P2MP/MP2MP LSPs    14
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