CCAMP Working Group J.E. Lopez de Vergara Internet Draft Universidad Autonoma de Madrid Intended status: Standards Track V. Lopez Expires: April 2015 O. Gonzalez de Dios Telefonica I+D/GCTO D. King Old Dog Consulting Z. Ali Cisco Systems October 27, 2014 A YANG data model for WSON and Flexi-Grid Optical Networks draft-vergara-flexigrid-yang-00.txt Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. This document may not be modified, and derivative works of it may not be created, except to publish it as an RFC and to translate it into languages other than English. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. 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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. Abstract This document defines a YANG model for managing dynamic Optical networks, including Wavelength Switched Optical Networks (WSON) and Flexi-Grid DWDM Networks. The model described in this document is composed of two submodels: one to define an optical traffic engineering database, and other one to describe the optical paths or media channels. Table of Contents 1. Introduction ................................................ 3 2. Conventions used in this document ........................... 3 3. Optical network topology model overview ..................... 4 4. Main building blocks......................................... 4 4.1. Optical TED ............................................ 5 4.2. Media-channel/network-media-channel .................... 8 5. Example of use ............................................. 11 6. Formal Syntax .............................................. 12 7. Security Considerations .................................... 12 8. IANA Considerations ........................................ 13 9. References ................................................. 13 9.1. Normative References .................................. 13 9.2. Informative References ................................ 14 10. Contributors .............................................. 14 11. Acknowledgments ........................................... 14 Appendix A. YANG models........................................ 15 A.1. Optical TED YANG Model ................................ 15 A.2. Media Channel YANG Model .............................. 32 A.3. License ............................................... 40 Authors' Addresses ............................................ 42 Lopez de Vergara, et al. Expires April 27, 2015 [Page 2] Internet-Draft A YANG data model for WSON and October 2014 Flexi-Grid optical Traffic Engineering Database 1. Introduction Internet-based traffic is dramatically increasing every year. Moreover, such traffic is also becoming more dynamic. Thus, transport networks need to evolve from current DWDM systems towards elastic optical networks, based on flexi-grid transmission and switching technologies. This technology aims at increasing both transport network scalability and flexibility, allowing the optimization of bandwidth usage. This document presents a YANG model for objects in the dynamic optical network, including the nodes, transponders and links between them, as well as how such links interconnect nodes and transponders. The model presented in this document considers two different optical technologies: Wavelength Switched Optical Networks (WSON) [1] and flexi-grid DWDM Networks [2]. The YANG model allows the representation of the optical layer of a network, combined with the underlying physical layer. The model is defined in two YANG modules: o Optical-TED (Traffic Engineering Database): This module defines all the information needed to represent an optical node, an optical transponder and an optical link. o Media-channel: This module defines the whole path from a source transponder to the destination through a number of intermediate nodes. This document identifies the WSON and Flexi-Grid optical components, parameters and their values, characterizes the features and the performances of the optical elements. An application example is provided towards the end of the document to better understand their utility. 2. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC-2119 [3]. In this document, these words will appear with that interpretation only when in ALL CAPS. Lower case uses of these words are not to be interpreted as carrying RFC-2119 significance. In this document, the characters ">>" preceding an indented line(s) indicates a compliance requirement statement using the key words Lopez de Vergara, et al. Expires April 27, 2015 [Page 3] Internet-Draft A YANG data model for WSON and October 2014 Flexi-Grid optical Traffic Engineering Database listed above. This convention aids reviewers in quickly identifying or finding the explicit compliance requirements of this RFC. 3. Optical network topology model overview YANG is a data modeling language used to model configuration data manipulated by the NETCONF protocol. For more information on YANG, the document [9] provides a tutorial with some examples on how to model the information and use the YANG structures. Several YANG models have already been specified for network configurations. For instance, the work in [4] has proposed a YANG model of a TED, but only covering the IP layer. A YANG model has also been proposed in [5] to configure optical DWDM parameters. On the other hand, a TED has been proposed for optical networks in [10], but this approach did not specify a YANG model to enable its configuration. As stated before, we propose a model to describe an optical topology that is split in two YANG sub-modules: . Optical-TED: In order to be compatible with existing proposals, we augment the definitions contained in [4], by defining the different elements we find in an optical network: a node, a transponder and a link. For that, each of those elements is defined as a container that includes a group of attributes. References to the elements are provided to be later used in the definition of a media channel. It also includes the data types for the type of modulation, the optical technology, the FEC, etc. . Media-channel: This module defines the whole path from a source transponder to the destination through a number of intermediate nodes and links. For this, it takes the information defined before in the optical TED. Next section provides a detailed view of each module. 4. Main building blocks Subsections below detail each of the defined YANG modules. They are listed in Appendix A, and have been validated using the pyang tool [11]. Lopez de Vergara, et al. Expires April 27, 2015 [Page 4] Internet-Draft A YANG data model for WSON and October 2014 Flexi-Grid optical Traffic Engineering Database 4.1. Optical TED The description of the three main components, optical-node, optical- transponder and optical-link is provided below. Optical-sliceable- transponders are also defined. ::= : This element designates a node in the network ::= : Contains all the attributes related to the node, such as its unique id, its interfaces or its management addresses. : An unique numeric identifier for the node. It is also used as a reference in order to point to it in the media-channel module. ::= [ / ] : The list containing all the information of the interfaces : Determines the interface name. : Port number of the interface. : Boolean value that defines whether the interface is input or not. : Boolean value that defines whether the interface is output or not. : Description of the usage of the interface. : Determines if the interface is numbered or unnumbered. ::= Lopez de Vergara, et al. Expires April 27, 2015 [Page 5] Internet-Draft A YANG data model for WSON and October 2014 Flexi-Grid optical Traffic Engineering Database : A interface with its own IP address : Only available if is "numbered-interface". Determines the IP address of the interface. ::=