PCEP Procedures and Protocol Extensions for Using PCE as a Central Controller (PCECC) of BIER-TE
draft-chen-pce-controller-bier-te-00

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PCE WG                                                           R. Chen
Internet-Draft                                                     B. Xu
Intended status: Standards Track                                 ch. Zhu
Expires: March 28, 2021                                  ZTE Corporation
                                                      September 24, 2020

   PCEP Procedures and Protocol Extensions for Using PCE as a Central
                     Controller (PCECC) of BIER-TE
                  draft-chen-pce-controller-bier-te-00

Abstract

   This document specifies extensions to PCEP protocol when a PCE-based
   controller is also responsible for configuring the forwarding actions
   on the routers, in addition to computing the paths for packet flows
   in a BIER-TE network and telling the edge routers what instructions
   to attach to packets as they enter the network.

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   This Internet-Draft will expire on March 28, 2021.

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Chen, et al.             Expires March 28, 2021                 [Page 1]
Internet-Draft                PCECC BIER-TE               September 2020

   the Trust Legal Provisions and are provided without warranty as
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  PCECC BIER-TE Requirements  . . . . . . . . . . . . . . . . .   3
   4.  Procedures for Using the PCE as the Central Controller
       (PCECC) in BIER . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Stateful PCE Model  . . . . . . . . . . . . . . . . . . .   4
     4.2.  New Functions . . . . . . . . . . . . . . . . . . . . . .   4
     4.3.  PCECC Capability Advertisement  . . . . . . . . . . . . .   4
     4.4.  BIER Path Operations  . . . . . . . . . . . . . . . . . .   4
       4.4.1.  PCECC Bit Index Explicit Replication (BIER)-TE  . . .   5
         4.4.1.1.  PCECC BIER-TE information allocation  . . . . . .   5
         4.4.1.2.  Redundant PCEs  . . . . . . . . . . . . . . . . .   5
         4.4.1.3.  Re Delegation and Cleanup . . . . . . . . . . . .   5
         4.4.1.4.  Synchronization of BIER information Allocations .   5
     4.5.  PCEP messages . . . . . . . . . . . . . . . . . . . . . .   5
       4.5.1.  The OPEN Object . . . . . . . . . . . . . . . . . . .   6
         4.5.1.1.  PCECC Capability sub-TLV  . . . . . . . . . . . .   6
       4.5.2.  PATH-SETUP-TYPE TLV . . . . . . . . . . . . . . . . .   6
       4.5.3.  CCI object  . . . . . . . . . . . . . . . . . . . . .   6
         4.5.3.1.  BIER Encapsulation Sub-TLV  . . . . . . . . . . .   8
         4.5.3.2.  Address TLVs  . . . . . . . . . . . . . . . . . .   8
         4.5.3.3.  ROUTE-DISTINGUISHER TLV . . . . . . . . . . . . .   9
         4.5.3.4.  FEC object  . . . . . . . . . . . . . . . . . . .   9
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   [RFC8283]introduces the architecture for PCE as a central controller
   as an extension of the architecture described in[RFC4655] and assumes
   the continued use of PCEP as the protocol used between PCE and PCC.
   [RFC8283]further examines the motivations and applicability for PCEP
   as a Southbound Interface (SBI), and introduces the implications for
   the protocol.

   [I-D.ietf-pce-pcep-extension-for-pce-controller]specify the