Framework for Scheduled Use of Resources
draft-ietf-teas-scheduled-resources-07

Document Type Active Internet-Draft (teas WG)
Last updated 2018-04-10
Replaces draft-zhuang-teas-scheduled-resources
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TEAS Working Group                                             Y. Zhuang
Internet-Draft                                                     Q. Wu
Intended status: Informational                                   H. Chen
Expires: October 12, 2018                                         Huawei
                                                               A. Farrel
                                                        Juniper Networks
                                                          April 10, 2018

                Framework for Scheduled Use of Resources
                 draft-ietf-teas-scheduled-resources-07

Abstract

   Time-scheduled reservation of traffic engineering (TE) resources can
   be used to provide resource booking for TE Label Switched Paths so as
   to better guarantee services for customers and to improve the
   efficiency of network resource usage at any moment in time including
   future planned network usage.  This document provides a framework
   that describes and discusses the architecture for supporting
   scheduled reservation of TE resources.  This document does not
   describe specific protocols or protocol extensions needed to realize
   this service.

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
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   This Internet-Draft will expire on October 12, 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
   Provisions Relating to IETF Documents

Zhuang, et al.          Expires October 12, 2018                [Page 1]
Internet-Draft         Scheduled Use of Resources             April 2018

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Provisioning TE-LSPs and TE Resources . . . . . . . . . .   3
     2.2.  Selecting the Path of an LSP  . . . . . . . . . . . . . .   4
     2.3.  Planning Future LSPs  . . . . . . . . . . . . . . . . . .   5
     2.4.  Looking at Future Demands on TE Resources . . . . . . . .   6
       2.4.1.  Interaction Between Time-Scheduled and Ad Hoc
               Reservations  . . . . . . . . . . . . . . . . . . . .   6
     2.5.  Requisite State Information . . . . . . . . . . . . . . .   6
   3.  Architectural Concepts  . . . . . . . . . . . . . . . . . . .   8
     3.1.  Where is Scheduling State Held? . . . . . . . . . . . . .   8
     3.2.  What State is Held? . . . . . . . . . . . . . . . . . . .  10
     3.3.  Enforcement of Operator Policy  . . . . . . . . . . . . .  11
   4.  Architecture Overview . . . . . . . . . . . . . . . . . . . .  12
     4.1.  Service Request . . . . . . . . . . . . . . . . . . . . .  13
       4.1.1.  Reoptimization After TED Updates  . . . . . . . . . .  14
     4.2.  Initialization and Recovery . . . . . . . . . . . . . . .  15
     4.3.  Synchronization Between PCEs  . . . . . . . . . . . . . .  15
   5.  Multi-Domain Considerations . . . . . . . . . . . . . . . . .  16
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  19
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  19
   10. Informative References  . . . . . . . . . . . . . . . . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   Traffic Engineering Label Switched Paths (TE-LSPs) are connection
   oriented tunnels in packet and non-packet networks [RFC3209],
   [RFC3945].  TE-LSPs may reserve network resources for use by the
   traffic they carry, thus providing some guarantees of service
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