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 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 . . . . . . . . . . . . . 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 areShow full document text