PCE Controlled ID Space
draft-li-pce-controlled-id-space-07

Document Type Active Internet-Draft (individual)
Authors Cheng Li  , Mach Chen  , Aijun Wang  , Weiqiang Cheng  , Chao Zhou 
Last updated 2020-10-30
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Network Working Group                                              C. Li
Internet-Draft                                                   M. Chen
Intended status: Experimental                        Huawei Technologies
Expires: May 4, 2021                                             A. Wang
                                                           China Telecom
                                                                W. Cheng
                                                            China Mobile
                                                                 C. Zhou
                                                                     HPE
                                                        October 31, 2020

                        PCE Controlled ID Space
                  draft-li-pce-controlled-id-space-07

Abstract

   The Path Computation Element Communication Protocol (PCEP) provides a
   mechanisms for the Path Computation Elements (PCEs) to perform path
   computations in response to Path Computation Clients (PCCs) requests.
   The Stateful PCE extensions allow stateful control of Multiprotocol
   Label Switching (MPLS) Traffic Engineering (TE) Label Switched Paths
   (LSPs) using PCEP.  Furthermore, PCE can be used for computing paths
   in the SR networks.

   Stateful PCE provide active control of MPLS-TE LSPs via PCEP, for a
   model where the PCC delegates control over one or more locally
   configured LSPs to the PCE.  Further, stateful PCE could also create
   and remove PCE-initiated LSPs by itself.  A PCE-based Central
   Controller (PCECC) simplify the processing of a distributed control
   plane by integrating with elements of Software-Defined Networking
   (SDN).

   In some use cases, such as PCECC or Binding Segment Identifier (SID)
   for Segment Routing (SR), there are requirements for a stateful PCE
   to make allocation of labels, SIDs, etc.  These use cases require PCE
   aware of various identifier spaces from where to make allocations on
   behalf of a PCC.  This document describes a mechanism for a PCC to
   inform the PCE of the identifier space set aside for the PCE control
   via PCEP.  The identifier could be an MPLS label, a SID or any other
   to-be-defined identifier that can be allocated by a PCE.

Status of This Memo

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

Li, et al.                 Expires May 4, 2021                  [Page 1]
Internet-Draft           PCE Controlled ID Space            October 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   3.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  PCE-based Central Control . . . . . . . . . . . . . . . .   4
       3.1.1.  PCECC for MPLS/SR-MPLS  . . . . . . . . . . . . . . .   4
       3.1.2.  PCECC for SRv6  . . . . . . . . . . . . . . . . . . .   5
     3.2.  Binding SID Allocation  . . . . . . . . . . . . . . . . .   5
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Objects . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Open Object . . . . . . . . . . . . . . . . . . . . . . .   7
       5.1.1.  LABEL-CONTROL-SPACE TLV . . . . . . . . . . . . . . .   7
       5.1.2.  FUNCT-ID-CONTROL-SPACE TLV  . . . . . . . . . . . . .   9
   6.  Other Considerations  . . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  PCEP TLV Type Indicators  . . . . . . . . . . . . . . . .  11
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