PCE Controlled ID Space
draft-li-pce-controlled-id-space-02

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Last updated 2019-03-07
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Network Working Group                                              C. Li
Internet-Draft                                                   M. Chen
Intended status: Experimental                                    J. Dong
Expires: September 9, 2019                                         Z. Li
                                                     Huawei Technologies
                                                                 A. Wang
                                                           China Telecom
                                                                 C. Zhou
                                                            Cisco System
                                                           March 8, 2019

                        PCE Controlled ID Space
                  draft-li-pce-controlled-id-space-02

Abstract

   The Path Computation Element Communication Protocol (PCEP) provides
   mechanisms for 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, PCEP can be used for computing paths
   in 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 delete PCE-initiated LSPs 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 where to make allocations on
   behalf of PCC.  This document describes a mechanism for PCC to inform
   the PCE of the identifier space under its control via PCEP.  The
   identifier could be MPLS label, SID or any other to-be-defined
   identifier to 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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute

Li, et al.              Expires September 9, 2019               [Page 1]
Internet-Draft           PCE Controlled ID Space              March 2019

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Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
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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  . . . . . . . . . . . . .   8
   6.  Other Considerations  . . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
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