Framework for Scheduled Use of Resources
RFC 8413
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RFC - Informational
(July 2018; No errata)
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Last updated |
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2018-07-09
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Replaces |
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draft-zhuang-teas-scheduled-resources
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Vishnu Beeram
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Shepherd write-up |
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Show
(last changed 2017-12-03)
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| IESG |
IESG state |
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RFC 8413 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Deborah Brungard
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Send notices to |
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Vishnu Beeram <vbeeram@juniper.net>
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| IANA |
IANA review state |
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IANA OK - No Actions Needed
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IANA action state |
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No IANA Actions
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Internet Engineering Task Force (IETF) Y. Zhuang
Request for Comments: 8413 Q. Wu
Category: Informational H. Chen
ISSN: 2070-1721 Huawei
A. Farrel
Juniper Networks
July 2018
Framework for Scheduled Use of Resources
Abstract
Time-Scheduled (TS) 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
network usage that is planned for the future. 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 document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are candidates for any level of Internet
Standard; see Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8413.
Zhuang, et al. Informational [Page 1]
RFC 8413 Scheduled Use of Resources July 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
(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 . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Provisioning TE-LSPs and TE Resources . . . . . . . . . . 4
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 . . . . . . . . . . . . . . . 7
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 . . . . . . . . . . . . . 12
4. Architecture Overview . . . . . . . . . . . . . . . . . . . . 13
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. Informative References . . . . . . . . . . . . . . . . . . . 19
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 21
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 22
Zhuang, et al. Informational [Page 2]
RFC 8413 Scheduled Use of Resources July 2018
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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