Generalized Labels for the Flexi-Grid in Lambda Switch Capable (LSC) Label Switching Routers
RFC 7699
| Document | Type | RFC - Proposed Standard (November 2015; No errata) | |
|---|---|---|---|
| Authors | Adrian Farrel , Daniel King , Yao Li , Fatai Zhang | ||
| Last updated | 2018-12-20 | ||
| Replaces | draft-farrkingel-ccamp-flexigrid-lambda-label | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Daniele Ceccarelli | ||
| Shepherd write-up | Show (last changed 2015-07-27) | ||
| IESG | IESG state | RFC 7699 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | (None) | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) A. Farrel
Request for Comments: 7699 D. King
Updates: 3471, 6205 Old Dog Consulting
Category: Standards Track Y. Li
ISSN: 2070-1721 Nanjing University
F. Zhang
Huawei Technologies
November 2015
Generalized Labels for the Flexi-Grid in
Lambda Switch Capable (LSC) Label Switching Routers
Abstract
GMPLS supports the description of optical switching by identifying
entries in fixed lists of switchable wavelengths (called grids)
through the encoding of lambda labels. Work within the ITU-T Study
Group 15 has defined a finer-granularity grid, and the facility to
flexibly select different widths of spectrum from the grid. This
document defines a new GMPLS lambda label format to support this
flexi-grid.
This document updates RFCs 3471 and 6205 by introducing a new label
format.
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/rfc7699.
Farrel, et al. Standards Track [Page 1]
RFC 7699 GMPLS Labels for Flexi-Grid November 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
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carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
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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 . . . . . . . . . . . . . 4
2. Overview of Flexi-Grid . . . . . . . . . . . . . . . . . . . . . 4
3. Fixed-Grid Lambda Label Encoding . . . . . . . . . . . . . . . . 5
4. Flexi-Grid Label Format and Values . . . . . . . . . . . . . . . 5
4.1. Flexi-Grid Label Encoding . . . . . . . . . . . . . . . . . 5
4.2. Considerations of Bandwidth . . . . . . . . . . . . . . . . 7
4.3. Composite Labels . . . . . . . . . . . . . . . . . . . . . 7
5. Manageability and Backward Compatibility Considerations . . . . 9
5.1. Control-Plane Backward Compatibility . . . . . . . . . . . 9
5.2. Manageability Considerations . . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . . 10
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 10
7.1. Grid Subregistry . . . . . . . . . . . . . . . . . . . . . 10
7.2. DWDM Channel Spacing Subregistry . . . . . . . . . . . . . 11
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.1. Normative References . . . . . . . . . . . . . . . . . . . 11
8.2. Informative References . . . . . . . . . . . . . . . . . . 11
Appendix A. Flexi-Grid Example . . . . . . . . . . . . . . . . . . 13
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 14
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14
Farrel, et al. Standards Track [Page 2]
RFC 7699 GMPLS Labels for Flexi-Grid November 2015
1. Introduction
As described in [RFC3945], GMPLS extends MPLS from supporting only
Packet Switch Capable (PSC) interfaces and switching, to also support
four new classes of interfaces and switching that include Lambda
Switch Capable (LSC).
A functional description of the extensions to MPLS signaling needed
to support this new class of interface and switching is provided in
[RFC3471].
Section 3.2.1.1 of [RFC3471] states that wavelength labels "only have
significance between two neighbors": global wavelength semantics are
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