PCE Controlled ID Space
draft-li-pce-controlled-id-space-00

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Last updated 2018-06-20
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Network Working Group                                              C. Li
Internet-Draft                                                   M. Chen
Intended status: Experimental                                    J. Dong
Expires: December 22, 2018                                         Z. Li
                                                                D. Dhody
                                                     Huawei Technologies
                                                           June 20, 2018

                        PCE Controlled ID Space
                  draft-li-pce-controlled-id-space-00

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
   blending it with elements of Software-Defined Networking (SDN) and
   without necessarily completely replacing it.

   In some use cases, such as PCECC, Binding Segment Identifier (SID),
   SR Path Identification, there is a requirement for a stateful PCE to
   make allocation of labels, SID, Path-ID respectively.  These use
   cases require for the PCE to be aware of the various identifier space
   from which to make allocations on behalf of PCC.  This documents
   specify a mechanism for a PCC to inform the PCE of the identifier
   space under its control via PCEP.  The identifier could be MPLS
   label, SID, Path ID or another future identifier to be allocated by a
   PCE.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

Li, et al.              Expires December 22, 2018               [Page 1]
Internet-Draft           PCE Controlled ID Space               June 2018

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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   This Internet-Draft will expire on December 22, 2018.

Copyright Notice

   Copyright (c) 2018 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Use cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  PCE-based Central Control . . . . . . . . . . . . . . . .   4
     3.2.  Binding SID Allocation  . . . . . . . . . . . . . . . . .   5
     3.3.  Path ID Allocation  . . . . . . . . . . . . . . . . . . .   5
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Objects . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Open Object . . . . . . . . . . . . . . . . . . . . . . .   7
       5.1.1.  LABEL-CONTROL-SPACE TLV . . . . . . . . . . . . . . .   7
       5.1.2.  SRv6-PATH-ID-CONTROL-SPACE TLV  . . . . . . . . . . .   8
   6.  Other Considerations  . . . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
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