General Network Element Constraint Encoding for GMPLS-Controlled Networks
RFC 7579
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Type |
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RFC - Proposed Standard
(June 2015; No errata)
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Last updated |
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2015-10-14
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IETF
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plain text
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bibtex
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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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Lou Berger
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Shepherd write-up |
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Show
(last changed 2014-09-30)
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IESG state |
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RFC 7579 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Responsible AD |
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Deborah Brungard
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(None)
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| IANA |
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Version Changed - Review Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) G. Bernstein, Ed.
Request for Comments: 7579 Grotto Networking
Category: Standards Track Y. Lee, Ed.
ISSN: 2070-1721 D. Li
Huawei
W. Imajuku
NTT
J. Han
Huawei
June 2015
General Network Element Constraint Encoding
for GMPLS-Controlled Networks
Abstract
Generalized Multiprotocol Label Switching (GMPLS) can be used to
control a wide variety of technologies. In some of these
technologies, network elements and links may impose additional
routing constraints such as asymmetric switch connectivity, non-local
label assignment, and label range limitations on links.
This document provides efficient, protocol-agnostic encodings for
general information elements representing connectivity and label
constraints as well as label availability. It is intended that
protocol-specific documents will reference this memo to describe how
information is carried for 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 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7579.
Bernstein, et al. Standards Track [Page 1]
RFC 7579 General Network Element Constraint Encoding June 2015
Copyright Notice
Copyright (c) 2015 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
(http://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. Node Switching Asymmetry Constraints .......................3
1.2. Non-local Label Assignment Constraints .....................4
1.3. Conventions Used in This Document ..........................4
2. Encoding ........................................................4
2.1. Connectivity Matrix Field ..................................5
2.2. Port Label Restrictions Field ..............................6
2.2.1. SIMPLE_LABEL ........................................8
2.2.2. CHANNEL_COUNT .......................................8
2.2.3. LABEL_RANGE .........................................9
2.2.4. SIMPLE_LABEL & CHANNEL_COUNT ........................9
2.2.5. LINK_LABEL_EXCLUSIVITY .............................10
2.3. Link Set Field ............................................10
2.4. Available Labels Field ....................................12
2.5. Shared Backup Labels Field ................................13
2.6. Label Set Field ...........................................14
3. Security Considerations ........................................16
4. IANA Considerations ............................................17
5. References .....................................................17
5.1. Normative References ......................................17
5.2. Informative References ....................................18
Appendix A. Encoding Examples .....................................19
A.1. Link Set Field ............................................19
A.2. Label Set Field ...........................................19
A.3. Connectivity Matrix .......................................20
A.4. Connectivity Matrix with Bidirectional Symmetry ...........24
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