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Run idnits with the --verbose option for more detailed information about the items above. -------------------------------------------------------------------------------- 1 CCAMP Working Group J.E. Lopez de Vergara 2 Internet Draft Universidad Autonoma de Madrid 3 Intended status: Standards Track V. Lopez 4 Expires: April 2015 O. Gonzalez de Dios 5 Telefonica I+D/GCTO 6 D. King 7 Old Dog Consulting 8 Z. Ali 9 Cisco Systems 10 October 27, 2014 12 A YANG data model for WSON and Flexi-Grid Optical Networks 13 draft-vergara-flexigrid-yang-00.txt 15 Status of this Memo 17 This Internet-Draft is submitted in full conformance with the 18 provisions of BCP 78 and BCP 79. This document may not be modified, 19 and derivative works of it may not be created, except to publish it 20 as an RFC and to translate it into languages other than English. 22 Internet-Drafts are working documents of the Internet Engineering 23 Task Force (IETF), its areas, and its working groups. Note that 24 other groups may also distribute working documents as Internet- 25 Drafts. 27 Internet-Drafts are draft documents valid for a maximum of six 28 months and may be updated, replaced, or obsoleted by other documents 29 at any time. It is inappropriate to use Internet-Drafts as 30 reference material or to cite them other than as "work in progress." 32 The list of current Internet-Drafts can be accessed at 33 http://www.ietf.org/ietf/1id-abstracts.txt 35 The list of Internet-Draft Shadow Directories can be accessed at 36 http://www.ietf.org/shadow.html 38 This Internet-Draft will expire on April 27, 2015. 40 Copyright Notice 42 Copyright (c) 2014 IETF Trust and the persons identified as the 43 document authors. All rights reserved. 45 Flexi-Grid optical Traffic Engineering Database 47 This document is subject to BCP 78 and the IETF Trust's Legal 48 Provisions Relating to IETF Documents 49 (http://trustee.ietf.org/license-info) in effect on the date of 50 publication of this document. Please review these documents 51 carefully, as they describe your rights and restrictions with 52 respect to this document. Code Components extracted from this 53 document must include Simplified BSD License text as described in 54 Section 4.e of the Trust Legal Provisions and are provided without 55 warranty as described in the Simplified BSD License. 57 Abstract 59 This document defines a YANG model for managing dynamic Optical 60 networks, including Wavelength Switched Optical Networks (WSON) and 61 Flexi-Grid DWDM Networks. The model described in this document is 62 composed of two submodels: one to define an optical traffic 63 engineering database, and other one to describe the optical paths or 64 media channels. 66 Table of Contents 68 1. Introduction ................................................ 3 69 2. Conventions used in this document ........................... 3 70 3. Optical network topology model overview ..................... 4 71 4. Main building blocks......................................... 4 72 4.1. Optical TED ............................................ 5 73 4.2. Media-channel/network-media-channel .................... 8 74 5. Example of use ............................................. 11 75 6. Formal Syntax .............................................. 12 76 7. Security Considerations .................................... 12 77 8. IANA Considerations ........................................ 13 78 9. References ................................................. 13 79 9.1. Normative References .................................. 13 80 9.2. Informative References ................................ 14 81 10. Contributors .............................................. 14 82 11. Acknowledgments ........................................... 14 83 Appendix A. YANG models........................................ 15 84 A.1. Optical TED YANG Model ................................ 15 85 A.2. Media Channel YANG Model .............................. 32 86 A.3. License ............................................... 40 87 Authors' Addresses ............................................ 42 88 Flexi-Grid optical Traffic Engineering Database 90 1. Introduction 92 Internet-based traffic is dramatically increasing every year. 93 Moreover, such traffic is also becoming more dynamic. Thus, 94 transport networks need to evolve from current DWDM systems towards 95 elastic optical networks, based on flexi-grid transmission and 96 switching technologies. This technology aims at increasing both 97 transport network scalability and flexibility, allowing the 98 optimization of bandwidth usage. 100 This document presents a YANG model for objects in the dynamic 101 optical network, including the nodes, transponders and links between 102 them, as well as how such links interconnect nodes and transponders. 104 The model presented in this document considers two different optical 105 technologies: Wavelength Switched Optical Networks (WSON) [1] and 106 flexi-grid DWDM Networks [2]. The YANG model allows the 107 representation of the optical layer of a network, combined with the 108 underlying physical layer. The model is defined in two YANG modules: 110 o Optical-TED (Traffic Engineering Database): This module defines 111 all the information needed to represent an optical node, an 112 optical transponder and an optical link. 114 o Media-channel: This module defines the whole path from a source 115 transponder to the destination through a number of intermediate 116 nodes. 118 This document identifies the WSON and Flexi-Grid optical components, 119 parameters and their values, characterizes the features and the 120 performances of the optical elements. An application example is 121 provided towards the end of the document to better understand their 122 utility. 124 2. Conventions used in this document 126 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", 127 "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this 128 document are to be interpreted as described in RFC-2119 [3]. 130 In this document, these words will appear with that interpretation 131 only when in ALL CAPS. Lower case uses of these words are not to be 132 interpreted as carrying RFC-2119 significance. 134 In this document, the characters ">>" preceding an indented line(s) 135 indicates a compliance requirement statement using the key words 136 Flexi-Grid optical Traffic Engineering Database 138 listed above. This convention aids reviewers in quickly identifying 139 or finding the explicit compliance requirements of this RFC. 141 3. Optical network topology model overview 143 YANG is a data modeling language used to model configuration data 144 manipulated by the NETCONF protocol. For more information on YANG, 145 the document [9] provides a tutorial with some examples on how to 146 model the information and use the YANG structures. 148 Several YANG models have already been specified for network 149 configurations. For instance, the work in [4] has proposed a YANG 150 model of a TED, but only covering the IP layer. A YANG model has 151 also been proposed in [5] to configure optical DWDM parameters. On 152 the other hand, a TED has been proposed for optical networks in 153 [10], but this approach did not specify a YANG model to enable its 154 configuration. 156 As stated before, we propose a model to describe an optical topology 157 that is split in two YANG sub-modules: 159 . Optical-TED: In order to be compatible with existing proposals, we 160 augment the definitions contained in [4], by defining the 161 different elements we find in an optical network: a node, a 162 transponder and a link. For that, each of those elements is 163 defined as a container that includes a group of attributes. 164 References to the elements are provided to be later used in the 165 definition of a media channel. It also includes the data types for 166 the type of modulation, the optical technology, the FEC, etc. 167 . Media-channel: This module defines the whole path from a source 168 transponder to the destination through a number of intermediate 169 nodes and links. For this, it takes the information defined before 170 in the optical TED. 171 Next section provides a detailed view of each module. 173 4. Main building blocks 175 Subsections below detail each of the defined YANG modules. They are 176 listed in Appendix A, and have been validated using the pyang tool 177 [11]. 179 Flexi-Grid optical Traffic Engineering Database 181 4.1. Optical TED 183 The description of the three main components, optical-node, optical- 184 transponder and optical-link is provided below. Optical-sliceable- 185 transponders are also defined. 187 ::= 189 : This element designates a node in the network 191 ::= 192 194 : Contains all the attributes 195 related to the node, such as its unique id, its interfaces or 196 its management addresses. 198 : An unique numeric identifier for the node. It is 199 also used as a reference in order to point to it in the 200 media-channel module. 202 ::= 203 204 [ / ] 206 : The list containing all the 207 information of the interfaces 209 : Determines the interface name. 211 : Port number of the interface. 213 : Boolean value that defines whether the 214 interface is input or not. 216 : Boolean value that defines whether the 217 interface is output or not. 219 : Description of the usage of the interface. 221 : Determines if the interface is numbered 222 or unnumbered. 224 ::= 226 Flexi-Grid optical Traffic Engineering Database 228 : A interface with its own IP 229 address 231 : Only available if 232 is "numbered-interface". Determines the IP address 233 of the interface. 235 ::=