OSPF Traffic Engineering (OSPF-TE) Link Availability Extension for Links with Variable Discrete Bandwidth
RFC 8330
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Type |
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RFC - Proposed Standard
(February 2018; No errata)
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Last updated |
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2018-02-14
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Replaces |
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draft-long-ccamp-ospf-availability-extension
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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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WG Document
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Document shepherd |
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Fatai Zhang
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Shepherd write-up |
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Show
(last changed 2017-09-26)
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| IESG |
IESG state |
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RFC 8330 (Proposed Standard)
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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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"Fatai Zhang" <zhangfatai@huawei.com>
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) H. Long
Request for Comments: 8330 M. Ye
Category: Standards Track Huawei Technologies Co., Ltd.
ISSN: 2070-1721 G. Mirsky
ZTE
A. D'Alessandro
Telecom Italia S.p.A.
H. Shah
Ciena
February 2018
OSPF Traffic Engineering (OSPF-TE) Link Availability Extension
for Links with Variable Discrete Bandwidth
Abstract
A network may contain links with variable discrete bandwidth, e.g.,
microwave and copper. The bandwidth of such links may change
discretely in response to a changing external environment. The word
"availability" is typically used to describe such links during
network planning. This document defines a new type of Generalized
Switching Capability-Specific Information (SCSI) TLV to extend the
Generalized Multiprotocol Label Switching (GMPLS) Open Shortest Path
First (OSPF) routing protocol. The extension can be used for route
computation in a network that contains links with variable discrete
bandwidth. Note that this document only covers the mechanisms by
which the availability information is distributed. The mechanisms by
which availability information of a link is determined and the use of
the distributed information for route computation are outside the
scope of this document. It is intended that technology-specific
documents will reference this document to describe specific uses.
Status of This Memo
This is an Internet Standards Track document.
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). Further information on
Internet Standards is available in 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/rfc8330.
Long, et al. Standards Track [Page 1]
RFC 8330 Availability Extension to OSPF-TE February 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
1.1. Conventions Used in This Document ..........................3
2. Abbreviations ...................................................4
3. Overview ........................................................4
4. TE Metric Extension to OSPF-TE ..................................5
4.1. Availability SCSI-TLV ......................................5
4.2. Processing Procedures ......................................6
5. Security Considerations .........................................6
6. IANA Considerations .............................................7
7. References ......................................................7
7.1. Normative References .......................................7
7.2. Informative References .....................................8
Acknowledgments ...................................................10
Authors' Addresses ................................................10
Long, et al. Standards Track [Page 2]
RFC 8330 Availability Extension to OSPF-TE February 2018
1. Introduction
Some data-plane technologies, e.g., microwave and copper, allow
seamless changes of maximum physical bandwidth through a set of known
discrete values. The parameter "availability", as described in
[G.827], [F.1703], and [P.530], is often used to describe the link
capacity. The availability is a time scale, representing a
proportion of the operating time that the requested bandwidth is
ensured. To set up a Label Switched Path (LSP) across these links,
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