YANG data model for Flexi-Grid Optical Networks
draft-vergara-ccamp-flexigrid-yang-02
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This is an older version of an Internet-Draft whose latest revision state is "Replaced".
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Authors | Universidad Autonoma de Madrid , Victor Lopez , Oscar Gonzalez de Dios , Daniel King , Young Lee , Zafar Ali | ||
Last updated | 2016-03-02 | ||
Replaces | draft-vergara-flexigrid-yang | ||
Replaced by | draft-ietf-ccamp-flexigrid-yang, draft-ietf-ccamp-flexigrid-yang | ||
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draft-vergara-ccamp-flexigrid-yang-02
CCAMP Working Group J.E. Lopez de Vergara Internet Draft Universidad Autonoma de Madrid Intended status: Standards Track V. Lopez Expires: August 28, 2016 O. Gonzalez de Dios Telefonica I+D/GCTO D. King Lancaster University Y. Lee Huawei Z. Ali Cisco Systems March 1, 2016 YANG data model for Flexi-Grid Optical Networks draft-vergara-ccamp-flexigrid-yang-02.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. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html This Internet-Draft will expire on August 28, 2016. Copyright Notice Copyright (c) 2016 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 Lopez de Vergara, et al. Expires August 28, 2016 [Page 1] Internet-Draft A YANG data model for Flexi-Grid March 2016 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. Abstract This document defines a YANG model for managing flexi-grid optical Networks. The model described in this document is composed of two submodels: one to define a flexi-grid traffic engineering database, and other one to describe the flexi-grid paths or media channels. Table of Contents 1. Introduction .............................................. 2 2. Conventions used in this document ......................... 3 3. Flexi-grid network topology model overview ................ 3 4. Main building blocks....................................... 4 4.1. flexi-grid TED ....................................... 4 4.2. Media-channel/network-media-channel .................. 7 5. Example of use ............................................ 9 6. Formal Syntax ............................................. 11 7. Security Considerations ................................... 11 8. IANA Considerations ....................................... 11 9. References ................................................ 11 9.1. Normative References ................................. 11 9.2. Informative References ............................... 12 10. Contributors ............................................. 12 11. Acknowledgments .......................................... 12 Appendix A. YANG models....................................... 12 A.1. Flexi-grid TED YANG Model ............................ 13 A.1.1. YANG Model - Tree .................................. 13 A.1.2. YANG MOdel - Code .................................. 14 A.2. Media Channel YANG Model ............................. 23 A.2.1. YANG Model - Tree .................................. 23 A.2.2. YANG Model - Code .................................. 24 A.3. License .............................................. 29 Authors' Addresses ........................................... 30 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 flexi-grid objects in the Lopez de Vergara, et al. Expires August 28, 2016 [Page 2] Internet-Draft A YANG data model for Flexi-Grid March 2016 dynamic optical network, including the nodes, transponders and links between them, as well as how such links interconnect nodes and transponders. The YANG model for flexi-grid [RFC7698] networks allows the representation of the flexi-grid optical layer of a network, combined with the underlying physical layer. The model is defined in two YANG modules: o Flexi-grid-TED (Traffic Engineering Database): This module defines all the information needed to represent the flexi-grid optical node, transponder and link. o Media-channel: This module defines the whole path from a source transponder to the destination through a number of intermediate nodes in the flexi-grid optical network. This document identifies the flexi-grid components, parameters and their values, characterizes the features and the performances of the flexi-grid 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 [RFC2119]. 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 listed above. This convention aids reviewers in quickly identifying or finding the explicit compliance requirements of this RFC. 3. Flexi-grid network topology model overview YANG is a data modeling language used to model configuration data manipulated by the NETCONF protocol. Several YANG models have already been specified for network configurations. For instance, the work in [I-D.draft-ietf-i2rs-yang-network-topo] has proposed a YANG model of a TED, but only covering the IP layer. A YANG model has also been proposed in [I-D.draft-dharini-netmod-g-698-2-yang] to configure flexi-grid DWDM parameters. As stated before, we propose a model to describe an flexi-grid topology that is split in two YANG sub-modules: Lopez de Vergara, et al. Expires August 28, 2016 [Page 3] Internet-Draft A YANG data model for Flexi-Grid March 2016 o Flexi-grid-TED: In order to be compatible with existing proposals, we augment the definitions contained in [I-D.draft-ietf-i2rs-yang-network-topo], by defining the different elements we find in an flexi-grid 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 flexi-grid technology, the FEC, etc. o 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 flexi-grid TED. The following 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. 4.1. Flexi-grid TED The description of the three main components, flexi-grid-node, flexi-grid-transponder and flexi-grid-link is provided below. flexi-grid-sliceable-transponders are also defined. <flexi-grid-node> ::= <flexi-grid-node-attributes> <flexi-grid-node>: This element designates a node in the network <flexi-grid-node-attributes> ::= <node-id> <list-interface> <connectivity_matrix> <flexi-grid-node-attributes>: Contains all the attributes related to the node, such as its unique id, its interfaces or its management addresses. <node-id>: 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. <list-interface> ::= <name> <port-number> <input-port> <output-port> <description> <interface-type> [<numbered-interface> / <unnumbered-interface>] <list-interface>: The list containing all the information of the interfaces Lopez de Vergara, et al. Expires August 28, 2016 [Page 4] Internet-Draft A YANG data model for Flexi-Grid March 2016 <name>: Determines the interface name. <port-number>: Port number of the interface. <input-port>: Boolean value that defines whether the interface is input or not. <output-port>: Boolean value that defines whether the interface is output or not. <description>: Description of the usage of the interface. <interface-type>: Determines if the interface is numbered or unnumbered. <numbered-interface> ::= <n-i-ip-address> <numbered-interface>: A interface with its own IP address <n-i-ip-address>: Only available if <interface-type> is "numbered-interface". Determines the IP address of the interface. <unnumbered-interface> ::= <u-i-ip-address> <label> <unnumbered-interface>: A interface that needs a label to be unique <u-i-ip-address>: Only available if <interface-type> is "numbered-interface". Determines the node IP address, which with the label defines the interface. <label>: Label that determines the interface, joint with the node IP address. <connectivity-matrix> ::= <connections> <connectivity-matrix>: Determines whether a connection port in/port out exists. <connections> ::= <input-port-id> <output-port-id> <connections>: The actual connection between an input port and an output port <input-port-id>: The input port associated with the output port. Lopez de Vergara, et al. Expires August 28, 2016 [Page 5] Internet-Draft A YANG data model for Flexi-Grid March 2016 <output-port-id>: The output port associated with the input port. <flexi-grid-transponder> ::= <flexi-grid-transponder-attributes> <flexi-grid-node-attributes> <flexi-grid-transponder>: Determines an optical transponder in the network <flexi-grid-transponder-attributes> ::= <available-modulation> <modulation-type> <available-FEC> <FEC-enabled> [<FEC-type>] <flexi-grid-transponder-attributes>: Contains all the attributes related to the transponder, such as whether it has FEC enabled or not, or its modulation type. <available-modulation>: It provides a list of the modulations available at this transponder. <modulation-type>: Determines the type of modulation in use: QPSK, QAM16, QAM64... <available-FEC>: It provides a list of the FEC algorithms available at this transponder. <FEC-enabled>: Boolean value that determines whether is the FEC enabled or not. <FEC-type>: Determines the type of FEC in use: reed-solomon, hamming-code, enum golay, BCH... <flexi-grid-node-attributes>: See above, node attributes are reused also for transponders. <flexi-grid-sliceable-transponder> ::= <carrier-id> <flexi-grid-transponder-attributes> <flexi-grid-sliceable-transponder>: Provides a list of transponders. <carrier-id>: An identifier for each one of the transponders in the list. <flexi-grid-transponder-attributes>: See above, transponder attributes are reused also for sliceable transponders. Lopez de Vergara, et al. Expires August 28, 2016 [Page 6] Internet-Draft A YANG data model for Flexi-Grid March 2016 <link> ::= <flexi-grid-link-attributes> <link>: This element describes all the information of a link. <flexi-grid-link-attributes> ::= <link-id> <technology-type> <available-label-flexi-grid> <N-max> <base-frequency> <nominal-central-frequency-granularity> <slot-width-granularity> <flexi-grid-link-attributes>: Contains all the attributes related to the link, such as its unique id, its N value, its latency, etc. <link-id>: Unique id of the link <available-label-flexi-grid>: Array of bits that determines, with each bit, the availability of each interface for flexi-grid technology. <N-max>: The max value of N in this link, being N the number of slots. <base-frequency>: The default central frequency used in the link. <nominal-central-frequency-granularity>: It is the spacing between allowed nominal central frequencies and it is set to 6.25 GHz (note: sometimes referred to as 0.00625 THz). <slot-width-granularity>: 12.5 GHz, as defined in G.694.1. 4.2. Media-channel/network-media-channel The model defines two types of media channels, following the terminology summarized in [RFC7698]: media-channel, which represents a (effective) frequency slot supported by a concatenation of media elements (fibers, amplifiers, filters, switching matrices...); network-media-channel: It is a media channel that transports an Optical Tributary Signal. In the model, the network media channel has as end-points transponders, which are the source and destination of the optical signal. The description of these components is provided below: <media-channel> ::= <source> <destination> <link-channel> <effective- freq-slot> <media-channel>: Determines a media-channel and its components. Lopez de Vergara, et al. Expires August 28, 2016 [Page 7] Internet-Draft A YANG data model for Flexi-Grid March 2016 <source > ::= <source-node> <source-port> <source>: In a media-channel, the source is a node and a port. <source-node>: Reference to the source node of the media channel. <source-port>: Reference to the source port in the source <node. <destination> ::= <destination-node> <destination-port> <destination>: In a media-channel, the destination is a node and a port. <destination-node>: Reference to the destination node of the media channel. <destination-port>: Reference to the destination port in the destination node. <link-channel> ::= <link-id> <N> <M> <source-node> <source-port> <destination-node> <destination-port> <link> <bidirectional> <link-channel>: Defines a list with each of the links between elements in the media channel. <link-id>: Unique identifier for the link channel <N>: N used for this link channel. <M>: M used for this link channel. <source-node>: Reference to the source node of this link channel. <source-port>: Reference to the source port of this link channel. <destination-node>: Reference to the destination node of this link channel. <destination-port>: Reference to the destination port of this link channel. <link>: Reference to the link of this link channel. <bidirectional>: Indicates if this link is bidirectional or not. Lopez de Vergara, et al. Expires August 28, 2016 [Page 8] Internet-Draft A YANG data model for Flexi-Grid March 2016 <effective-freq-slot> ::= <N> <M> <effective-freq-slot>: Defines the effective frequency slot of the media channel, which could be different from the one defined in the link channels. <N>: Defines the effective N for this media channel. <M>: Defines the effective M for this media channel. <network-media-channel> ::= <source> <destination> <link-channel> <effective-freq-slot> <network-media-channel>: Determines a network media-channel and its components. <source > ::= <source-node> <source-transponder> <source>: In a network media channel, the source is defined by a node and a transponder. <source-node>: Reference to the source node of the media channel. <source-transponder>: Reference to the source transponder in the source node. <destination> ::= <destination-node> <destination-transponder> <destination>: In a network media channel, the destination is defined by a node and a transponder <destination-node>: Reference to the destination node of the media channel. <destination-port>: Reference to the destination port in the destination node. <link-channel>: See above, the information is reused for both types of media channels. <effective-freq-slot>: See above, this information is reused for both types of media channels. 5. Example of use In order to explain how this model is used, we provide the following example. An optical network usually has multiple transponders, Lopez de Vergara, et al. Expires August 28, 2016 [Page 9] Internet-Draft A YANG data model for Flexi-Grid March 2016 switches (nodes) and links between them. Figure 1 shows a simple topology, where two physical paths interconnect two optical transponders. Media channel <==================================================> Path x <--------------------------------------------------> +----------+ +----------+ Link 1 |Flexi-grid| Link 2 |Flexi-grid| Link 3 .--->| node |<-------->| node |<---. | | B | | C | | | +----------+ +----------+ | v v +-------------+ +-------------+ | Flexi-grid | | Flexi-grid | | transponder | | transponder | | A | | E | +-------------+ +-------------+ ^ ^ | +----------+ | | Link 4 |Flexi-grid| Link 5 | '------------>| node |<-----------' | D | +----------+ <--------------------------------------------------> Path y Figure 1. Topology example. In order to configure a media channel to interconnect transponders A and E, first of all we have to populate the flexi-grid TED YANG model with all elements in the network: 1. We define the transponders A and E, including their FEC type, if enabled, and modulation type. We also provide node identifiers and addresses for the transponders, as well as interfaces included in the transponders. Sliceable transponders can also be defined if needed. 2. We do the same for the nodes B, C and D, providing their identifiers, addresses and interfaces, as well as the internal connectivity matrix between interfaces. 3. Then, we also define the links 1 to 5 that interconnect nodes and transponders, indicating which flexi-grid labels are available. Other information, such as the slot frequency and granularity are also provided. Lopez de Vergara, et al. Expires August 28, 2016 [Page 10] Internet-Draft A YANG data model for Flexi-Grid March 2016 Next, we can configure the media channel from the information we have stored in the flexi-grid TED, by querying which elements are available, and planning the resources that have to be provided on each situation. Note that every element in the flexi-grid TED has a reference, and this is the way in which they are called in the media channel. 4. Depending on the case, it is possible to define either the source and destination node ports, or the source and destination node and transponder. In our case, we would define a network media channel, with source transponder A and source node B, and destination transponder E and destination node C. Thus, we are going to follow path x. 5. Then, for each link in the path x, we indicate which channel we are going to use, providing information about the slots, and what nodes are connected. Finally, the flexi-grid TED has to be updated with each element usage status each time a media channel is created or torn down. 6. Formal Syntax The following syntax specification uses the augmented Backus-Naur Form (BNF) as described in [RFC5234]. 7. Security Considerations The transport protocol used for sending the managed information MUST support authentication and SHOULD support encryption. The defined data-model by itself does not create any security implications. 8. IANA Considerations The namespace used in the defined models is currently based on the IDEALIST project URI. Future versions of this document could register a URI in the IETF XML registry [RFC3688], as well as in the YANG Module Names registry [RFC6020]. 9. References 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. Lopez de Vergara, et al. Expires August 28, 2016 [Page 11] Internet-Draft A YANG data model for Flexi-Grid March 2016 [RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, January 2008, <http:/www.rfc-editor.org/info/rfc5234>. [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, October 2010. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January 2004. 9.2. Informative References [RFC7698] Gonzalez de Dios, O., Casellas, R., "Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks", RFC7698, November 2015. [I-D.draft-ietf-i2rs-yang-network-topo] Clemm, A., Medved, J., Varga, R., Tkacik, T., Bahadur, N., Ananthakrishnan, H., "A YANG Data Model for Network Topologies", Internet Draft draft-ietf-i2rs-yang-network-topo-02.txt, 2015. [I-D.draft-dharini-netmod-g-698-2-yang] Galimberti, G., Kunze, R., Kam Lam, Hiremagalur, D., Grammel, G., Eds., "A YANG model to manage optical interface parameters of DWDM applications", Internet Draft, draft-dharini-netmod-g-698-2-yang-04, 2015. 10. Contributors The model presented in this paper was contributed to by more people than can be listed on the author list. Additional contributors include: o Daniel Michaud Vallinoto, Universidad Autonoma de Madrid 11. Acknowledgments The work presented in this Internet-Draft has been partially funded by the European Commission under the project Industry-Driven Elastic and Adaptive Lambda Infrastructure for Service and Transport Networks (IDEALIST) of the Seventh Framework Program, with Grant Agreement Number: 317999. Appendix A. YANG models Lopez de Vergara, et al. Expires August 28, 2016 [Page 12] Internet-Draft A YANG data model for Flexi-Grid March 2016 A.1. Flexi-grid TED YANG Model A.1.1. Yang Model - Tree Structure module: ietf-flexi-grid-ted flexi-grid-network-type augment /nd:networks/nd:network/nd:network-types: +--rw flexi-grid-network! flexi-grid-network-attributes augment /nd:networks/nd:network: +--rw flexi-grid-network-attributes +--rw name? string flexi-grid-node-attributes augment /nd:networks/nd:network/nd:node: +--rw node-type? flexi-grid-node-type +--rw interfaces* [name] | +--rw name string | +--rw port-number? uint32 | +--rw input-port? boolean | +--rw output-port? boolean | +--rw description? string | +--rw type? interface-type | +--rw numbered-interface | | +--rw n-i-ip-address? inet:ip-address | +--rw unnumbered-interface | +--rw u-i-ip-address? inet:ip-address | +--rw label? uint32 +--rw connectivity-matrix +--rw connections* [input-port-id] +--rw input-port-id flexi-grid-node-port-ref +--rw output-port-id? flexi-grid-node-port-ref flexi-grid-transponder-attributes augment /nd:networks/nd:network/nd:node: +--rw available-modulation* modulation +--rw modulation-type? modulation +--rw available-FEC* FEC +--rw FEC-enabled? boolean +--rw FEC-type? FEC flexi-grid-sliceable-transponder-attributes augment /nd:networks/nd:network/nd:node: +--rw transponder-list* [carrier-id] +--rw carrier-id uint32 +--rw available-modulation* modulation +--rw modulation-type? modulation +--rw available-FEC* FEC +--rw FEC-enabled? boolean +--rw FEC-type? FEC flexi-grid-link-attributes augment /nd:networks/nd:network/nt:link: +--rw available-label-flexi-grid* bits +--rw N-max? int32 +--rw base-frequency? decimal64 +--rw nominal-central-frequency-granularity? decimal64 +--rw slot-width-granularity? decimal64 Lopez de Vergara, et al. Expires August 28, 2016 [Page 13] Internet-Draft A YANG data model for Flexi-Grid March 2016 A.1.2. YANG Model - Code <CODE BEGINS> file "ietf-flexi-grid-ted.yang" module ietf-flexi-grid-ted { yang-version 1; namespace "urn:ietf:params:xml:ns:yang:ietf-flexi-grid-ted"; prefix fg-ted; import ietf-inet-types { prefix inet; } import ietf-network { prefix nd; } import ietf-network-topology { prefix nt; } organization "IETF CCAMP Working Group"; contact "Editor: Jorge Lopez de Vergara <jorge.lopez_vergara@uam.es>"; description "This module contains a collection of YANG definitions for a Flexi-Grid Traffic Engineering Database (TED). Copyright (c) 2016 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info)."; revision 2016-02-04 { description "version 3."; reference "RFC XXX: A Yang Data Model for Flexi-Grid Optical Networks "; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 14] Internet-Draft A YANG data model for Flexi-Grid March 2016 typedef flexi-grid-node-type { type enumeration { enum flexi-grid-node { description "Flexi-grid node"; } enum flexi-grid-transponder { description "Flexi-grid transponder"; } enum flexi-grid-sliceable-transponder { description "Flexi-grid sliceable transponder"; } } description "Determines the node type: flexi-grid-node, flexi-grid-transponder or flexi-grid-sliceable-transponder"; } typedef modulation { type enumeration { enum QPSK { description "QPSK (Quadrature Phase Shift Keying) modulation"; } enum DP_QPSK { description "DP-QPSK (Dual Polarization Quadrature Phase Shift Keying) modulation"; } enum QAM16 { description "QAM16 (Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } enum DP_QAM16 { description "DP-QAM16 (Dual Polarization Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } enum DC_DP_QAM16 { description "DC DP-QAM16 (Dual Polarization Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } } description "Enumeration that defines the type of wave modulation"; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 15] Internet-Draft A YANG data model for Flexi-Grid March 2016 typedef FEC { type enumeration { enum reed-solomon { description "Reed-Solomon error correction"; } enum hamming-code{ description "Hamming Code error correction"; } enum golay{ description "Golay error correction"; } } description "Enumeration that defines the type of Forward Error Correction"; } typedef interface-type { type enumeration{ enum numbered-interface { description "The interface is numbered"; } enum unnumbered-interface { description "The interface is unnumbered"; } } description "Enumeration that defines if an interface is numbered or unnumbered"; } typedef flexi-grid-transponder-ref { type leafref { path "/nd:networks/nd:network/nd:node/nd:node-id"; } description "This type is used by data models that need to reference a flexi-grid optical transponder."; } typedef flexi-grid-node-ref { type leafref { path "/nd:networks/nd:network/nd:node/nd:node-id"; } description "This type is used by data models that need to reference a flexi-grid optical node."; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 16] Internet-Draft A YANG data model for Flexi-Grid March 2016 typedef flexi-grid-link-ref { type leafref { path "/nd:networks/nd:network/nt:link/nt:link-id"; } description "This type is used by data models that need to reference a flexi-grid optical link."; } typedef flexi-grid-node-port-ref { type leafref { path "/nd:networks/nd:network/nd:node/fg-ted:interfaces/"+ "fg-ted:port-number"; } description "This type is used by data models that need to reference a flexi-grid optical link."; } grouping flexi-grid-network-type { container flexi-grid-network { presence "indicates a flexi-grid optical network"; description "flexi-grid optical network"; } description "If present, it indicates a a flexi-grid optical TED network"; } grouping flexi-grid-network-attributes { container flexi-grid-network-attributes { leaf name { type string; description "Name of the topology"; } description "The attributes of the flexi-grid TED topology"; } description "The attributes of the flexi-grid TED topology"; } grouping flexi-grid-node-attributes { description "Set of attributes of an optical node."; leaf node-type { type flexi-grid-node-type; description "Type of flexi-grid node"; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 17] Internet-Draft A YANG data model for Flexi-Grid March 2016 list interfaces { key "name"; unique "port-number"; description "List of interfaces contained in the node"; leaf name { type string; description "Interface name"; } leaf port-number { type uint32; description "Number of the port used by the interface"; } leaf input-port { type boolean; description "Determines if the port is an input port"; } leaf output-port { type boolean; description "Determines if the port is an output port"; } leaf description { type string; description "Description of the interface"; } leaf type { type interface-type; description "Determines the type of the interface"; } container numbered-interface { when "type == numbered-interface" { description "If the interface is a numbered interface"; } description "Container that defines an numbered interface with an ip-address"; leaf n-i-ip-address{ type inet:ip-address; description "IP address of the numbered interface"; } } Lopez de Vergara, et al. Expires August 28, 2016 [Page 18] Internet-Draft A YANG data model for Flexi-Grid March 2016 container unnumbered-interface { when "type == unnumbered-interface" { description "If the interface is an unnumbered interface"; } description "Container that defines an unnumbered interface with an ip-address and a label"; leaf u-i-ip-address{ type inet:ip-address; description "IP address of the interface"; } leaf label { type uint32; description "Number as label for the interface"; } } } container connectivity-matrix { description "Connectivity matrix bentween the input and output ports"; list connections { key "input-port-id"; leaf input-port-id { type flexi-grid-node-port-ref; description "Identifier of the input port"; } leaf output-port-id { type flexi-grid-node-port-ref; description "Identifier of the output port"; } description "List of connections between input and output ports"; } } } grouping flexi-grid-transponder-attributes { description "Set of attributes of an optical transponder."; leaf-list available-modulation { type modulation; description "List determining all the available modulations"; } leaf modulation-type { type modulation; description "Modulation type of the wave"; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 19] Internet-Draft A YANG data model for Flexi-Grid March 2016 leaf-list available-FEC { type FEC; description "List determining all the available FEC"; } leaf FEC-enabled { type boolean; description "Determines whether the FEC is enabled or not"; } leaf FEC-type { type FEC; description "FEC type of the transponder"; } //uses flexi-grid-node-attributes; } grouping flexi-grid-sliceable-transponder-attributes { description "Grouping that defines a sliceable transponder which is composed by several transponders."; list transponder-list { key "carrier-id"; description "List of carriers"; leaf carrier-id { type uint32; description "Identifier of the carrier"; } uses flexi-grid-transponder-attributes; } } grouping flexi-grid-link-attributes { description "Set of attributes of an optical link"; leaf-list available-label-flexi-grid { type bits { bit is-available{ description "Set to 1 when it is available"; } } description "Array of bits that determines whether a spectral slot is available or not."; } leaf N-max { type int32; description "Maximum number of channels available."; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 20] Internet-Draft A YANG data model for Flexi-Grid March 2016 leaf base-frequency { type decimal64 { fraction-digits 5; } units THz; default 193.1; description "Default central frequency"; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } leaf nominal-central-frequency-granularity { type decimal64 { fraction-digits 5; } units GHz; default 6.25; description "It is the spacing between allowed nominal central frequencies and it is set to 6.25 GHz"; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } leaf slot-width-granularity { type decimal64 { fraction-digits 5; } units GHz; description "Minimum space between slot widths"; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } } augment "/nd:networks/nd:network/nd:network-types" { uses flexi-grid-network-type; description "Augment network-types including flexi-grid topology"; } augment "/nd:networks/nd:network" { when "/nd:networks/nd:network/"+ "nd:network-types/fg-ted:flexi-grid-network" { description "When it is a flexi-grid network"; } uses flexi-grid-network-attributes; description "Augment with flexi-grid network attributes"; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 21] Internet-Draft A YANG data model for Flexi-Grid March 2016 augment "/nd:networks/nd:network/nd:node" { when "/nd:networks/nd:network/"+ "nd:network-types/fg-ted:flexi-grid-network"{ description "When the node is part of a flexi-grid topology"; } uses flexi-grid-node-attributes; description "Augment node with flexi-grid attributes"; } augment "/nd:networks/nd:network/nd:node" { when "fg-ted:node-type/ fg-ted:flexi-grid-transponder"{ description "When it is a flexi-grid transponder"; } uses flexi-grid-transponder-attributes; description "Augment node with transponder attributes"; } augment "/nd:networks/nd:network/nd:node" { when "fg-ted:node-type/ fg-ted:optical-sliceable-transponder"{ description "When it is a flexi-grid sliceable transponder"; } uses flexi-grid-sliceable-transponder-attributes; description "Augment node with sliceable transponder attributes"; } augment "/nd:networks/nd:network/nt:link" { when "/nd:networks/nd:network/"+ "nd:network-types/fg-ted:flexi-grid-network"{ description "When it is a flexi-grid TED"; } uses flexi-grid-link-attributes; description "Augment network link attributes when it is a flexi-grid topology"; } } <CODE ENDS> Lopez de Vergara, et al. Expires August 28, 2016 [Page 22] Internet-Draft A YANG data model for Flexi-Grid March 2016 A.2. Media Channel YANG Model A.2.1. YANG Model - Tree module: ietf-flexi-grid-media-channel +--rw media-channel | +--rw source | | +--rw source-node? fg-ted:flexi-grid-node-ref | | +--rw source-port? fg-ted:flexi-grid-node-port-ref | +--rw destination | | +--rw destination-node? fg-ted:flexi-grid-node-ref | | +--rw destination-port? fg-ted:flexi-grid-node-port-ref | +--rw effective-freq-slot | | +--rw N? int32 | | +--rw M? int32 | +--rw link-channel* [link-id] | +--rw link-id int32 | +--rw N? int32 | +--rw M? int32 | +--rw source-node? fg-ted:flexi-grid-node-ref | +--rw source-port? fg-ted:flexi-grid-node-port-ref | +--rw destination-node? fg-ted:flexi-grid-node-ref | +--rw destination-port? fg-ted:flexi-grid-node-port-ref | +--rw link? fg-ted:flexi-grid-link-ref | +--rw bidireccional? boolean +--rw network-media-channel +--rw source | +--rw source-node? fg-ted:flexi-grid-node-ref | +--rw source-transponder? fg-ted:flexi-grid-transponder-ref +--rw destination | +--rw destination-node? fg-ted:flexi-grid-node-ref | +--rw destination-transponder? | fg-ted:flexi-grid-transponder-ref +--rw effective-freq-slot | +--rw N? int32 | +--rw M? int32 +--rw link-channel* [link-id] +--rw link-id int32 +--rw N? int32 +--rw M? int32 +--rw source-node? fg-ted:flexi-grid-node-ref +--rw source-port? fg-ted:flexi-grid-node-port-ref +--rw destination-node? fg-ted:flexi-grid-node-ref +--rw destination-port? fg-ted:flexi-grid-node-port-ref +--rw link? fg-ted:flexi-grid-link-ref +--rw bidireccional? boolean Lopez de Vergara, et al. Expires August 28, 2016 [Page 23] Internet-Draft A YANG data model for Flexi-Grid March 2016 A.2.2. YANG Model - Code <CODE BEGINS> file "ietf-flexi-grid-media-channel.yang" module ietf-flexi-grid-media-channel { yang-version 1; namespace "urn:ietf:params:xml:ns:yang:ietf-flexi-grid-media-channel"; prefix fg-mc; import ietf-flexi-grid-ted { prefix fg-ted; } organization "IETF CCAMP Working Group"; contact "Editor: Jorge Lopez de Vergara <jorge.lopez_vergara@uam.es>"; description "This module contains a collection of YANG definitions for a Flexi-Grid media channel. Copyright (c) 2016 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info)."; revision 2016-02-04 { description "version 3."; reference "RFC XXX: A Yang Data Model for Flexi-Grid Optical Networks "; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 24] Internet-Draft A YANG data model for Flexi-Grid March 2016 container media-channel { description "Media association that represents both the topology (i.e., path through the media) and the resource (frequency slot) that it occupies. As a topological construct, it represents a (effective) frequency slot supported by a concatenation of media elements (fibers, amplifiers, filters, switching matrices...). This term is used to identify the end-to-end physical layer entity with its corresponding (one or more) frequency slots local at each link filters."; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; container source { description "Source of the media channel"; leaf source-node { type fg-ted:flexi-grid-node-ref; description "Source node"; } leaf source-port { type fg-ted:flexi-grid-node-port-ref; description "Source port"; } } container destination { description "Destination of the media channel"; leaf destination-node { type fg-ted:flexi-grid-node-ref; description "Destination node"; } leaf destination-port { type fg-ted:flexi-grid-node-port-ref; description "Destination port"; } } uses media-channel-attributes; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 25] Internet-Draft A YANG data model for Flexi-Grid March 2016 container network-media-channel { description "It is a media channel that transports an Optical Tributary Signal "; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; container source { description "Source of the network media channel"; leaf source-node { type fg-ted:flexi-grid-node-ref; description "Source node"; } leaf source-transponder { type fg-ted:flexi-grid-transponder-ref; description "Source transponder"; } } container destination { description "Destination of the network media channel"; leaf destination-node { type fg-ted:flexi-grid-node-ref; description "Destination node"; } leaf destination-transponder { type fg-ted:flexi-grid-transponder-ref; description "Destination transponder"; } } uses media-channel-attributes; } grouping media-channel-attributes { description "Set of attributes of a media channel"; container effective-freq-slot { description "The effective frequency slot is an attribute of a media channel and, being a frequency slot, it is described by its nominal central frequency and slot width"; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; Lopez de Vergara, et al. Expires August 28, 2016 [Page 26] Internet-Draft A YANG data model for Flexi-Grid March 2016 leaf N { type int32; description "Is used to determine the Nominal Central Frequency. The set of nominal central frequencies can be built using the following expression: f = 193.1 THz + n x 0.00625 THz, where 193.1 THz is ITU-T ''anchor frequency'' for transmission over the C band, n is a positive or negative integer including 0."; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } leaf M { type int32; description "Is used to determine the slot width. A slot width is constrained to be M x SWG (that is, M x 12.5 GHz), where M is an integer greater than or equal to 1."; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } } list link-channel { key "link-id"; description "A list of the concatenated elements of the media channel."; leaf link-id { type int32; description "Identifier of the link"; } uses link-channel-attributes; } } grouping link-channel-attributes { description "A link channel is one of the concatenated elements of the media channel."; leaf N { type int32; description "Is used to determine the Nominal Central Frequency. The set of nominal central frequencies can be built using the following expression: f = 193.1 THz + n x 0.00625 THz, where 193.1 THz is ITU-T ''anchor frequency'' for transmission over the C band, n is a positive or negative integer including 0."; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } Lopez de Vergara, et al. Expires August 28, 2016 [Page 27] Internet-Draft A YANG data model for Flexi-Grid March 2016 leaf M { type int32; description "Is used to determine the slot width. A slot width is constrained to be M x SWG (that is, M x 12.5 GHz), where M is an integer greater than or equal to 1."; reference "draft-ietf-ccamp-flexi-grid-fwk-07"; } leaf source-node { type fg-ted:flexi-grid-node-ref; description "Source node of the link channel"; } leaf source-port { type fg-ted:flexi-grid-node-port-ref; description "Source port of the link channel"; } leaf destination-node { type fg-ted:flexi-grid-node-ref; description "Destination node of the link channel"; } leaf destination-port { type fg-ted:flexi-grid-node-port-ref; description "Destination port of the link channel"; } leaf link { type fg-ted:flexi-grid-link-ref; description "Link of the link channel"; } leaf bidireccional { type boolean; description "Determines whether the link is bidireccional or not"; } } } <CODE ENDS> Lopez de Vergara, et al. Expires August 28, 2016 [Page 28] Internet-Draft A YANG data model for Flexi-Grid March 2016 A.3. License Copyright (c) 2015 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: o Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. o Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. o Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Lopez de Vergara, et al. Expires August 28, 2016 [Page 29] Internet-Draft A YANG data model for Flexi-Grid March 2016 Authors' Addresses Jorge E. Lopez de Vergara Universidad Autonoma de Madrid Escuela Politecnica Superior C/Francisco Tomas y Valiente, 11 E-28049 Madrid, Spain Email: jorge.lopez_vergara@uam.es Victor Lopez Telefonica I+D/GCTO Distrito Telefonica E-28050 Madrid, Spain Email: victor.lopezalvarez@telefonica.com Oscar Gonzalez de Dios Telefonica I+D/GCTO Distrito Telefonica E-28050 Madrid, Spain Email: oscar.gonzalezdedios@telefonica.com Daniel King Lancaster University Email: d.king@lancaster.ac.uk Young Lee Huawei Technologies Email: leeyoung@huawei.com Zafar Ali Cisco Systems Email: zali@cisco.com Lopez de Vergara, et al. Expires August 28, 2016 [Page 30]