CCAMP Working Group S. Belotti, Ed. Internet-Draft Nokia Obsoletes: 9093 (if approved) I. Busi, Ed. Intended status: Standards Track Huawei Expires: 8 January 2024 D. Beller, Ed. Nokia H. Zheng Huawei E. Le Rouzic Orange A. Guo Futurewei Technologies D. King University of Lancaster 7 July 2023 A YANG Data Model for Layer 0 Types draft-ietf-ccamp-rfc9093-bis-05 Abstract This document defines a collection of common data types and groupings in the YANG data modeling language. These derived common types and groupings are intended to be imported by modules that model Layer 0 optical Traffic Engineering (TE) configuration and state capabilities such as Wavelength Switched Optical Networks (WSONs) and flexi-grid Dense Wavelength Division Multiplexing (DWDM) networks. This document obsoletes RFC 9093. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. 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." This Internet-Draft will expire on 8 January 2024. Belotti, et al. Expires 8 January 2024 [Page 1] Internet-Draft Yang for Layer 0 Types July 2023 Copyright Notice Copyright (c) 2023 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 (https://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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology and Notations . . . . . . . . . . . . . . . . 3 1.2. Prefix in Data Node Names . . . . . . . . . . . . . . . . 3 2. Layer 0 Types Module Contents . . . . . . . . . . . . . . . . 4 3. YANG Module for Layer 0 Types . . . . . . . . . . . . . . . . 6 4. Security Considerations . . . . . . . . . . . . . . . . . . . 46 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 47 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 47 6.1. Normative References . . . . . . . . . . . . . . . . . . 47 6.2. Informative References . . . . . . . . . . . . . . . . . 49 Appendix A. Changes from RFC 9093 . . . . . . . . . . . . . . . 50 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 50 Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 51 1. Introduction YANG [RFC7950] is a data modeling language used to model configuration data, state data, Remote Procedure Calls, and notifications for network management protocols such as the Network Configuration Protocol (NETCONF) [RFC6241]. The YANG language supports a small set of built-in data types and provides mechanisms to derive other types from the built-in types. Belotti, et al. Expires 8 January 2024 [Page 2] Internet-Draft Yang for Layer 0 Types July 2023 This document introduces a collection of common data types derived from the built-in YANG data types. The derived types and groupings are designed to be the common types applicable for modeling Traffic Engineering (TE) features as well as non-TE features (e.g., physical network configuration aspects) for Layer 0 optical networks in model(s) defined outside of this document. The applicability of Layer 0 types specified in this document includes Wavelength Switched Optical Networks (WSONs) [RFC6163] [ITU-T_G.698.2] and flexi-grid Dense Wavelength Division Multiplexing (DWDM) networks [RFC7698] [ITU-T_G.694.1]. This document adds new type definitions to the YANG modules and obsoletes [RFC9093]. For further details, see the revision statements of the YANG module in Section 3 or the summary in Appendix A. The YANG data model in this document conforms to the Network Management Datastore Architecture defined in [RFC8342]. 1.1. Terminology and Notations Refer to [RFC7446] and [RFC7581] for the key terms used in this document, and the terminology for describing YANG data models can be found in [RFC7950]. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 1.2. Prefix in Data Node Names In this document, names of data nodes and other data model objects are prefixed using the standard prefix associated with the corresponding YANG imported modules. +==========+===================+===========+ | Prefix | YANG module | Reference | +==========+===================+===========+ | l0-types | ietf-layer0-types | RFC XXXX | +----------+-------------------+-----------+ Table 1: Prefixes and corresponding YANG modules RFC Editor Note: Please replace XXXX with the RFC number assigned to this document. Belotti, et al. Expires 8 January 2024 [Page 3] Internet-Draft Yang for Layer 0 Types July 2023 The YANG module "ietf-layer0-types" (defined in Section 3) references [RFC4203], [RFC6163], [RFC6205], [RFC7698], [RFC7699], [RFC8363], [ITU-T_G.694.1], and [ITU-T_G.694.2]. 2. Layer 0 Types Module Contents This document defines a YANG module for common Layer 0 types, ietf- layer0-types. This module is used for WSON and flexi-grid DWDM networks. The "ietf-layer0-types" module contains the following YANG reusable types and groupings: l0-grid-type: A base YANG identity for the grid type as defined in [RFC6163] and [RFC7698]. dwdm-ch-spc-type: A base YANG identity for the DWDM channel-spacing type as defined in [RFC6205]. cwdm-ch-spc-type: A base YANG identity for the Coarse Wavelength Division Multiplexing (CWDM) channel-spacing type as defined in [RFC6205]. wson-label-start-end: The WSON label range was defined in [RFC6205], and the generic topology model defines the label-start/label-end in [RFC8795]. This grouping shows the WSON-specific label-start and label-end information. wson-label-hop: The WSON label range was defined in [RFC6205], and the generic topology model defines the label-hop in [RFC8795]. This grouping shows the WSON-specific label-hop information. l0-label-range-info: A YANG grouping that defines the Layer 0 label range information applicable for WSON as defined in [RFC6205]. This grouping is used in the flexi-grid DWDM by adding more flexi-grid-specific parameters. wson-label-step: Belotti, et al. Expires 8 January 2024 [Page 4] Internet-Draft Yang for Layer 0 Types July 2023 A YANG grouping that defines label steps for WSON as defined in [I-D.ietf-teas-rfc8776-update]. flexi-grid-label-start-end: The flexi-grid label range was defined in [RFC7698], and the generic topology model defines the label-start/label-end in [RFC8795]. This grouping shows the flexi-grid-specific label- start and label-end information which is used to describe the range of available nominal central frequencies. As described in section 3.1 of [RFC8363], the range of available nominal central frequencies are advertised for m=1, which means that for an available central frequency n, the frequency slot from central frequency n-1 to central frequency n+1 is available. flexi-grid-label-hop: The flexi-grid label range was defined in [RFC7698], and the generic topology model defines the label-hop in [RFC8795]. This grouping shows the WSON-specific label-hop information. flexi-grid-label-range-info: A YANG grouping that defines flexi-grid label range information as defined in [RFC7698] and [RFC8363]. flexi-grid-label-step: A YANG grouping that defines flexi-grid label steps as defined in [I-D.ietf-teas-rfc8776-update]. transceiver-capabilities: a YANG grouping to define the transceiver capabilities (also called "modes") needed to determine optical signal compatibility. standard-mode: a YANG grouping for ITU-T G.698.2 standard mode that guarantees interoperability. organizational-mode: a YANG grouping to define transponder operational mode supported by organizations or vendors. common-explicit-mode: Belotti, et al. Expires 8 January 2024 [Page 5] Internet-Draft Yang for Layer 0 Types July 2023 a YANG grouping to define the list of attributes related to optical impairments limits in case of transceiver explicit mode. This grouping should be the same used in [I-D.ietf-ccamp-dwdm-if-param-yang]. common-organizational-explicit-mode: a YANG grouping to define the common capabilities attributes limit range in case of operational mode and explicit mode. Also this grouping should be used in [I-D.ietf-ccamp-dwdm-if-param-yang]. cd-pmd-penalty: a YANG grouping to define the triplet used as entries in the list optional penalty associated with a given accumulated CD and PMD. This list of triplet cd, pmd, penalty can be used to sample the function penalty = f(CD, PMD). 3. YANG Module for Layer 0 Types file "ietf-layer0-types@2023-07-07.yang" module ietf-layer0-types { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-layer0-types"; prefix l0-types; organization "IETF CCAMP Working Group"; contact "WG Web: WG List: Editor: Dieter Beller Editor: Sergio Belotti Editor: Italo Busi Editor: Haomian Zheng "; description "This module defines Optical Layer 0 types. This module provides groupings that can be applicable to Layer 0 Fixed Optical Networks (e.g., CWDM (Coarse Wavelength Division Multiplexing) and DWDM (Dense Wavelength Division Belotti, et al. Expires 8 January 2024 [Page 6] Internet-Draft Yang for Layer 0 Types July 2023 Multiplexing)) and flexi-grid optical networks. Copyright (c) 2023 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 Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices. The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED', 'MAY', and 'OPTIONAL' in this document are to be interpreted as described in BCP 14 (RFC 2119) (RFC 8174) when, and only when, they appear in all capitals, as shown here."; // RFC Ed.: replace XXXX with actual RFC number and remove // this note // replace the revision date with the module publication date // the format is (year-month-day) revision 2023-07-07 { description "To be updated"; reference "RFC XXXX: A YANG Data Model for Layer 0 Types"; } revision 2021-08-13 { description "Initial version"; reference "RFC 9093: A YANG Data Model for Layer 0 Types"; } /* * Identities */ identity l0-grid-type { description "Layer 0 grid type"; reference "RFC 6163: Framework for GMPLS and Path Computation Element Belotti, et al. Expires 8 January 2024 [Page 7] Internet-Draft Yang for Layer 0 Types July 2023 (PCE) Control of Wavelength Switched Optical Networks (WSONs), ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid, ITU-T G.694.2 (12/2003): Spectral grids for WDM applications: CWDM wavelength grid"; } identity flexi-grid-dwdm { base l0-grid-type; description "Flexi-grid"; reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks, ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } identity wson-grid-dwdm { base l0-grid-type; description "DWDM grid"; reference "RFC 6163:Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs), ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } identity wson-grid-cwdm { base l0-grid-type; description "CWDM grid"; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers, ITU-T G.694.2 (12/2003): Spectral grids for WDM applications: CWDM wavelength grid"; } identity dwdm-ch-spc-type { description "DWDM channel-spacing type"; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers, ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: Belotti, et al. Expires 8 January 2024 [Page 8] Internet-Draft Yang for Layer 0 Types July 2023 DWDM frequency grid"; } identity dwdm-100ghz { base dwdm-ch-spc-type; description "100 GHz channel spacing"; } identity dwdm-50ghz { base dwdm-ch-spc-type; description "50 GHz channel spacing"; } identity dwdm-25ghz { base dwdm-ch-spc-type; description "25 GHz channel spacing"; } identity dwdm-12p5ghz { base dwdm-ch-spc-type; description "12.5 GHz channel spacing"; } identity flexi-ch-spc-type { description "Flexi-grid channel-spacing type"; reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks, ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } identity flexi-ch-spc-6p25ghz { base flexi-ch-spc-type; description "6.25 GHz channel spacing"; } identity flexi-slot-width-granularity { description "Flexi-grid slot width granularity"; } Belotti, et al. Expires 8 January 2024 [Page 9] Internet-Draft Yang for Layer 0 Types July 2023 identity flexi-swg-12p5ghz { base flexi-slot-width-granularity; description "12.5 GHz slot width granularity"; } identity cwdm-ch-spc-type { description "CWDM channel-spacing type"; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers, ITU-T G.694.2 (12/2003): Spectral grids for WDM applications: CWDM wavelength grid"; } identity cwdm-20nm { base cwdm-ch-spc-type; description "20nm channel spacing"; } identity modulation { description "base identity for modulation type"; } identity DPSK { base modulation; description "DPSK (Differential Phase Shift Keying) modulation"; } identity QPSK { base modulation; description "QPSK (Quadrature Phase Shift Keying) modulation"; } identity DP-QPSK { base modulation; description "DP-QPSK (Dual Polarization Quadrature Phase Shift Keying) modulation"; } identity QAM8 { base modulation; description Belotti, et al. Expires 8 January 2024 [Page 10] Internet-Draft Yang for Layer 0 Types July 2023 "8QAM (8 symbols Quadrature Amplitude Modulation)"; } identity DP-QAM8 { base modulation; description "DP-QAM8 (8 symbols Dual Polarization Quadrature Amplitude Modulation)"; } identity QAM16 { base modulation; description "QAM16 (16 symbols Quadrature Amplitude Modulation)"; } identity DP-QAM16 { base modulation; description "DP-QAM16 (16 symbols Dual Polarization Quadrature Amplitude Modulation)"; } identity QAM32 { base modulation; description "QAM32 (32 symbols Quadrature Amplitude Modulation)"; } identity DP-QAM32 { base modulation; description "DP-QAM32 (32 symbols Dual Polarization Quadrature Amplitude Modulation)"; } identity QAM64 { base modulation; description "QAM64 (64 symbols Quadrature Amplitude Modulation)"; } identity DP-QAM64 { base modulation; description "DP-QAM64 (64 symbols Dual Polarization Quadrature Amplitude Modulation)"; } Belotti, et al. Expires 8 January 2024 [Page 11] Internet-Draft Yang for Layer 0 Types July 2023 identity fec-type { description "Base identity from which specific FEC (Forward Error Correction) type identities are derived."; } identity g-fec { base fec-type; description "Generic Forward Error Correction (G-FEC)."; reference "ITU-T G.975 v2.0 (10/2000): Forward error correction for submarine systems."; } identity super-fec { base fec-type; description "Super Forward Error Correction (S-FEC)."; reference "ITU-T G.975.1 v1.2 (07/2013): Forward error correction for high bit-rate DWDM submarine systems."; } identity no-fec { base fec-type; description "No FEC"; } identity reed-solomon { base fec-type; description "Reed-Solomon error correction"; } identity hamming-code { base fec-type; description "Hamming Code error correction"; } identity golay { base fec-type; description "Golay error correction"; } identity sc-fec { Belotti, et al. Expires 8 January 2024 [Page 12] Internet-Draft Yang for Layer 0 Types July 2023 base fec-type; description "Staircase Forward Error Correction (SC-FEC)."; reference "Annex A of ITU-T G.709.2 v1.1 (09/2020):OTU4 long-reach interface."; } identity o-fec { base fec-type; description "Open Forward Error Correction (O-FEC) which reuses the Bose, Chaudhuri and Hocquenghem (BCH) FEC."; reference "Clause 16.4.4 of ITU-T G.709.3 v2.1 (11/2022): Flexible OTN long-reach interfaces; Annex E of ITU-T G.709.3 v2.1 (11/2022): Flexible OTN long-reach interfaces."; } identity c-fec { base fec-type; description "Concatenated FEC (C-FEC) that combines an outer Staircase Forward Error Correction (SC-FEC) code and an inner double-extended SD-FEC (128,119) Hamming code. More details are provided in clause 15/G.709.3 where it is called DSH instead of concatenated FEC."; reference "Annex A of ITU-T G.709.2 v1.1 (09/2020):OTU4 long-reach interface; Annex D of ITU-T G.709.3 v2.1 (11/2022): Flexible OTN long-reach interfaces; Clause 15 of ITU-T G.709.3 v2.1 (11/2022): Flexible OTN long-reach interfaces."; } identity line-coding { description "Base identity to defined the bit rate/line coding of optical tributary signals."; reference "Section 7.1.2 of ITU-T G.698.2 v3.0 (11/2018)."; } Belotti, et al. Expires 8 January 2024 [Page 13] Internet-Draft Yang for Layer 0 Types July 2023 identity line-coding-NRZ-2p5G { base line-coding; description "The non return to zero (NRZ) bit rate/line coding used by the optical tributary signal class NRZ 2.5G"; reference "Section 3.2.6 of ITU-T G.959.1 v8.0 (07/2018)."; } identity line-coding-NRZ-OTU1 { base line-coding; description "The non return to zero (NRZ) bit rate/line coding used by the Optical channel Transport Unit order 1 (OTU1) optical tributary signals"; reference "Section 7.2.1.2 of ITU-T G.959.1 v8.0 (07/2018)."; } identity line-coding-NRZ-10G { description "The non return to zero (NRZ) bit rate/line coding used by the optical tributary signal class NRZ 10G"; reference "Section 3.2.7 of ITU-T G.959.1 v8.0 (07/2018)."; } identity line-coding-NRZ-OTU2 { base line-coding; description "The non return to zero (NRZ) bit rate/line coding used by the Optical channel Transport Unit order 2 (OTU2) optical tributary signals"; reference "Section 7.2.1.2 of ITU-T G.959.1 v8.0 (07/2018)."; } identity line-coding-OTL4.4-SC { base line-coding; description "The bit rate/line coding used by optical tributary signals carrying a 100G Optical Transport Unit order 4 (OTU4) with Staircase Forward Error Correction (SC FEC) from a group of four Optical Transport Lanes (OTL)."; reference "Section 3.2.1 of ITU-T G.698.2 v3.0 (11/2018)."; } Belotti, et al. Expires 8 January 2024 [Page 14] Internet-Draft Yang for Layer 0 Types July 2023 identity line-coding-FOIC1.4-SC { base line-coding; description "The bit rate/line coding used by optical tributary signals carrying a FlexO Interface of order C1 with 4 lanes (FOIC1.1) with Staircase Forward Error Correction (SC FEC)."; reference "Section 3.2.1 of ITU-T G.698.2 v3.0 (11/2018)."; } identity wavelength-assignment { description "Wavelength selection base"; reference "RFC6163:Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs)"; } identity first-fit-wavelength-assignment { base wavelength-assignment; description "All the available wavelengths are numbered, and this WA (Wavelength Assignment) method chooses the available wavelength with the lowest index"; } identity random-wavelength-assignment { base wavelength-assignment; description "This WA method chooses an available wavelength randomly"; } identity least-loaded-wavelength-assignment { base wavelength-assignment; description "This WA method selects the wavelength that has the largest residual capacity on the most loaded link along the route (in multi-fiber networks)"; } identity term-type { description "Termination type"; reference "ITU-T G.709: Interfaces for the Optical Transport Network"; } Belotti, et al. Expires 8 January 2024 [Page 15] Internet-Draft Yang for Layer 0 Types July 2023 identity term-phys { base term-type; description "Physical layer termination"; } identity term-otu { base term-type; description "OTU (Optical Transport Unit) termination"; } identity term-odu { base term-type; description "ODU (Optical Data Unit) termination"; } identity term-opu { base term-type; description "OPU (Optical Payload Unit) termination"; } identity otu-type { description "Base identity from which specific OTU identities are derived"; reference "ITU-T G.709: Interfaces for the Optical Transport Network"; } identity OTU1 { base otu-type; description "OTU1 (2.66 Gb/s)"; } identity OTU1e { base otu-type; description "OTU1e (11.04 Gb/s)"; } identity OTU1f { base otu-type; description "OTU1f (11.27 Gb/s)"; } Belotti, et al. Expires 8 January 2024 [Page 16] Internet-Draft Yang for Layer 0 Types July 2023 identity OTU2 { base otu-type; description "OTU2 (10.70 Gb/s)"; } identity OTU2e { base otu-type; description "OTU2e (11.09 Gb/s)"; } identity OTU2f { base otu-type; description "OTU2f (11.31G)"; } identity OTU3 { base otu-type; description "OTU3 (43.01 Gb/s)"; } identity OTU3e1 { base otu-type; description "OTU3e1 (44.57 Gb/s)"; } identity OTU3e2 { base otu-type; description "OTU3e2 (44.58 Gb/s)"; } identity OTU4 { base otu-type; description "OTU4 (111.80 Gb/s)"; } identity OTUCn { base otu-type; description "OTUCn (n x 105.25 Gb/s)"; } Belotti, et al. Expires 8 January 2024 [Page 17] Internet-Draft Yang for Layer 0 Types July 2023 identity type-power-mode { description "power equalization mode used within the OMS and its elements"; } identity power-spectral-density { base type-power-mode; description "all elements must use power spectral density (W/Hz)"; } identity carrier-power { base type-power-mode; description "all elements must use power (dBm)"; } identity operational-mode { description "Base identity to be used when defining organization/vendor specific modes"; reference "Section 2.5.2 of RFC YYYY: A YANG Data Model for Optical Impairment-aware Topology."; } // RFC Ed.: replace YYYY with actual RFC number and remove // this note after draft-ietf-ccamp-optical-impairment-topology-yang // is published as an RFC /* * Typedefs */ typedef dwdm-n { type int16; description "The given value 'N' is used to determine the nominal central frequency. The nominal central frequency, 'f', is defined by: f = 193100.000 GHz + N x channel spacing (measured in GHz), where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor frequency' for transmission over the DWDM grid, and where 'channel spacing' is defined by the dwdm-ch-spc-type."; reference "RFC6205: Generalized Labels for Lambda-Switch-Capable (LSC) Belotti, et al. Expires 8 January 2024 [Page 18] Internet-Draft Yang for Layer 0 Types July 2023 Label Switching Routers, ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } typedef cwdm-n { type int16; description "The given value 'N' is used to determine the nominal central wavelength. The nominal central wavelength is defined by: Wavelength = 1471 nm + N x channel spacing (measured in nm) where 1471 nm is the conventional 'anchor wavelength' for transmission over the CWDM grid, and where 'channel spacing' is defined by the cwdm-ch-spc-type."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers, ITU-T G.694.2 (12/2003): Spectral grids for WDM applications: CWDM wavelength grid"; } typedef flexi-n { type int16; description "The given value 'N' is used to determine the nominal central frequency. The nominal central frequency, 'f', is defined by: f = 193100.000 GHz + N x channel spacing (measured in GHz), where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor frequency' for transmission over the DWDM grid, and where 'channel spacing' is defined by the flexi-ch-spc-type. Note that the term 'channel spacing' can be substituted by the term 'nominal central frequency granularity' defined in clause 8 of ITU-T G.694.1."; reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks, ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } Belotti, et al. Expires 8 January 2024 [Page 19] Internet-Draft Yang for Layer 0 Types July 2023 typedef flexi-m { type uint16; description "The given value 'M' is used to determine the slot width. A slot width is defined by: slot width = M x SWG (measured in GHz), where SWG is defined by the flexi-slot-width-granularity."; reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks. ITU-T G.694.1 (10/2020): Spectral grids for WDM applications: DWDM frequency grid"; } typedef standard-mode { type string; description "ITU-T G.698.2 standard mode that guarantees interoperability. It must be an string with the following format: B-DScW-ytz(v) where all these attributes are conformant to the ITU-T recomendation"; reference "ITU-T G.698.2 (11/2018)"; } typedef organization-identifier { type string; description "vendor/organization identifier that uses a private mode out of already defined in G.698.2 ITU-T application-code"; reference "Section 2.5.2 of RFC YYYY: A YANG Data Model for Optical Impairment-aware Topology."; } // RFC Ed.: replace YYYY with actual RFC number and remove // this note after draft-ietf-ccamp-optical-impairment-topology-yang // is published as an RFC typedef operational-mode { type identityref { base operational-mode; } description "Organization/vendor specific mode that guarantees Belotti, et al. Expires 8 January 2024 [Page 20] Internet-Draft Yang for Layer 0 Types July 2023 interoperability."; reference "Section 2.5.2 of RFC YYYY: A YANG Data Model for Optical Impairment-aware Topology."; } // RFC Ed.: replace YYYY with actual RFC number and remove // this note after draft-ietf-ccamp-optical-impairment-topology-yang // is published as an RFC typedef frequency-thz { type decimal64 { fraction-digits 9; } units "THz"; description "The DWDM frequency in THz, e.g., 193.112500000"; } typedef frequency-ghz { type decimal64 { fraction-digits 6; } units "GHz"; description "The DWDM frequency in GHz, e.g., 193112.500000"; } typedef dbm-t { type int32; units ".01dbm"; description "Amplifiers and Transceivers Power in dBm."; } typedef snr { type decimal64 { fraction-digits 2; } units "dB@0.1nm"; description "(Optical) Signal to Noise Ratio measured over 0.1 nm resolution bandwidth"; } typedef snr-or-null { type union { type snr; type empty; } Belotti, et al. Expires 8 January 2024 [Page 21] Internet-Draft Yang for Layer 0 Types July 2023 description "(Optical) Signal to Noise Ratio measured over 0.1 nm resolution bandwidth, when known, or an empty value when unknown."; } typedef fiber-type { type enumeration { enum G.652 { description "G.652 Standard Singlemode Fiber"; } enum G.654 { description "G.654 Cutoff Shifted Fiber"; } enum G.653 { description "G.653 Dispersion Shifted Fiber"; } enum G.655 { description "G.655 Non-Zero Dispersion Shifted Fiber"; } enum G.656 { description "G.656 Non-Zero Dispersion for Wideband Optical Transport"; } enum G.657 { description "G.657 Bend-Insensitive Fiber"; } } description "ITU-T based fiber-types"; } typedef decimal-2-digits { type decimal64 { fraction-digits 2; } description "A decimal64 value with two digits."; } typedef decimal-2-digits-or-null { type union { type decimal-2-digits; type empty; } description "A decimal64 value with two digits, when the value is known or an empty value when the value is not known."; Belotti, et al. Expires 8 January 2024 [Page 22] Internet-Draft Yang for Layer 0 Types July 2023 } typedef gain-in-db { type decimal-2-digits { range "0..max"; } units "dB"; description "The gain in dB."; } typedef gain-in-db-or-null { type union { type gain-in-db; type empty; } description "The gain in dB, when it is known or an empty value when the power gain/loss is not known."; } typedef loss-in-db { type decimal-2-digits { range "0..max"; } units "dB"; description "The power attenuation in dB."; } typedef loss-in-db-or-null { type union { type loss-in-db; type empty; } description "The power attenuation in dB, when it is known or an empty value when the loss is not known."; } typedef power-in-dbm { type decimal-2-digits; units "dBm"; description "The power in dBm."; } typedef power-in-dbm-or-null { Belotti, et al. Expires 8 January 2024 [Page 23] Internet-Draft Yang for Layer 0 Types July 2023 type union { type power-in-dbm; type empty; } description "The power in dBm, when it is known or an empty value when the power is not known."; } typedef decimal-5-digits { type decimal64 { fraction-digits 5; } description "A decimal64 value with five digits."; } typedef decimal-5-digits-or-null { type union { type decimal-5-digits; type empty; } description "A decimal64 value with five digits, when the value is known or an empty value when the value is not known."; } typedef decimal-16-digits { type decimal64 { fraction-digits 16; } description "A decimal64 value with sixteen digits."; } typedef decimal-16-digits-or-null { type union { type decimal-5-digits; type empty; } description "A decimal64 value with sixteen digits, when the value is known or an empty value when the value is not known."; } /* * Groupings */ Belotti, et al. Expires 8 January 2024 [Page 24] Internet-Draft Yang for Layer 0 Types July 2023 grouping wson-label-start-end { description "The WSON label-start or label-end used to specify WSON label range."; choice grid-type { description "Label for DWDM or CWDM grid"; case dwdm { leaf dwdm-n { when "derived-from-or-self(../../../grid-type, \"wson-grid-dwdm\")" { description "Valid only when grid type is DWDM."; } type l0-types:dwdm-n; description "The central frequency of DWDM."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } } case cwdm { leaf cwdm-n { when "derived-from-or-self(../../../grid-type, \"wson-grid-cwdm\")" { description "Valid only when grid type is CWDM."; } type l0-types:cwdm-n; description "Channel wavelength computing input."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } } } reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } grouping wson-label-hop { description "Generic label-hop information for WSON"; choice grid-type { description Belotti, et al. Expires 8 January 2024 [Page 25] Internet-Draft Yang for Layer 0 Types July 2023 "Label for DWDM or CWDM grid"; case dwdm { choice single-or-super-channel { description "single or super channel"; case single { leaf dwdm-n { type l0-types:dwdm-n; description "The given value 'N' is used to determine the nominal central frequency."; } } case super { leaf-list subcarrier-dwdm-n { type l0-types:dwdm-n; description "The given values 'N' are used to determine the nominal central frequency for each subcarrier channel."; reference "ITU-T Recommendation G.694.1: Spectral grids for WDM applications: DWDM frequency grid"; } } } } case cwdm { leaf cwdm-n { type l0-types:cwdm-n; description "The given value 'N' is used to determine the nominal central wavelength."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } } } reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } grouping l0-label-range-info { description "Information about Layer 0 label range."; leaf grid-type { Belotti, et al. Expires 8 January 2024 [Page 26] Internet-Draft Yang for Layer 0 Types July 2023 type identityref { base l0-grid-type; } description "Grid type"; } leaf priority { type uint8; description "Priority in Interface Switching Capability Descriptor (ISCD)."; reference "RFC 4203: OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)"; } reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } grouping wson-label-step { description "Label step information for WSON"; choice l0-grid-type { description "Grid type: DWDM, CWDM, etc."; case dwdm { leaf wson-dwdm-channel-spacing { when "derived-from-or-self(../../grid-type, \"wson-grid-dwdm\")" { description "Valid only when grid type is DWDM."; } type identityref { base dwdm-ch-spc-type; } description "Label-step is the channel spacing (GHz), e.g., 100.000, 50.000, 25.000, or 12.500 GHz for DWDM."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } } case cwdm { leaf wson-cwdm-channel-spacing { when "derived-from-or-self(../../grid-type, \"wson-grid-cwdm\")" { Belotti, et al. Expires 8 January 2024 [Page 27] Internet-Draft Yang for Layer 0 Types July 2023 description "Valid only when grid type is CWDM."; } type identityref { base cwdm-ch-spc-type; } description "Label-step is the channel spacing (nm), i.e., 20 nm for CWDM, which is the only value defined for CWDM."; reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"; } } } reference "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers, ITU-T G.694.2 (12/2003): Spectral grids for WDM applications: CWDM wavelength grid"; } grouping flexi-grid-label-start-end { description "The flexi-grid label-start or label-end used to specify flexi-grid label range."; leaf flexi-n { type l0-types:flexi-n; description "The given value 'N' is used to determine the nominal central frequency. As described in section 3.1 of RFC 8363, the range of available nominal central frequencies are advertised for m=1, which means that for an available central frequency n, the frequency slot from central frequency n-1 to central frequency n+1 is available."; } reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks; RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } grouping flexi-grid-frequency-slot { Belotti, et al. Expires 8 January 2024 [Page 28] Internet-Draft Yang for Layer 0 Types July 2023 description "Flexi-grid frequency slot grouping."; uses flexi-grid-label-start-end; leaf flexi-m { type l0-types:flexi-m; description "The given value 'M' is used to determine the slot width."; } reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } grouping flexi-grid-label-hop { description "Generic label-hop information for flexi-grid"; choice single-or-super-channel { description "single or super channel"; case single { uses flexi-grid-frequency-slot; } case super { list subcarrier-flexi-n { key "flexi-n"; uses flexi-grid-frequency-slot; description "List of subcarrier channels for flexi-grid super channel."; } } } reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } grouping flexi-grid-label-range-info { description "Flexi-grid-specific label range related information"; uses l0-label-range-info; container flexi-grid { description "flexi-grid definition"; leaf slot-width-granularity { type identityref { Belotti, et al. Expires 8 January 2024 [Page 29] Internet-Draft Yang for Layer 0 Types July 2023 base flexi-slot-width-granularity; } default "flexi-swg-12p5ghz"; description "Minimum space between slot widths. Default is 12.500 GHz."; reference "RFC 7698: Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } leaf min-slot-width-factor { type uint16 { range "1..max"; } default "1"; description "A multiplier of the slot width granularity, indicating the minimum slot width supported by an optical port. Minimum slot width is calculated by: Minimum slot width (GHz) = min-slot-width-factor * slot-width-granularity."; reference "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi- Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } leaf max-slot-width-factor { type uint16 { range "1..max"; } must '. >= ../min-slot-width-factor' { error-message "Maximum slot width must be greater than or equal to minimum slot width."; } description "A multiplier of the slot width granularity, indicating the maximum slot width supported by an optical port. Maximum slot width is calculated by: Maximum slot width (GHz) = max-slot-width-factor * slot-width-granularity If specified, maximum slot width must be greater than or equal to minimum slot width. If not specified, maximum Belotti, et al. Expires 8 January 2024 [Page 30] Internet-Draft Yang for Layer 0 Types July 2023 slot width is equal to minimum slot width."; reference "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi- Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } } } grouping flexi-grid-label-step { description "Label step information for flexi-grid"; leaf flexi-grid-channel-spacing { type identityref { base flexi-ch-spc-type; } default "flexi-ch-spc-6p25ghz"; description "Label-step is the nominal central frequency granularity (GHz), e.g., 6.25 GHz."; reference "RFC 7699: Generalized Labels for the Flexi-Grid in Lambda Switch Capable (LSC) Label Switching Routers"; } leaf flexi-n-step { type uint8; description "This attribute defines the multiplier for the supported values of 'N'. For example, given a grid with a nominal central frequency granularity of 6.25 GHz, the granularity of the supported values of the nominal central frequency could be 12.5 GHz. In this case, the values of flexi-n should be even and this constraint is reported by setting the flexi-n-step to 2. This attribute is also known as central frequency granularity in RFC 8363."; reference "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"; } } /* supported inverse multiplexing capabilities such as max. OTSiG:OTSi cardinality It is a transponder attribute not transceiver */ Belotti, et al. Expires 8 January 2024 [Page 31] Internet-Draft Yang for Layer 0 Types July 2023 /* leaf multiplexing-cap { type uint32; config false; description "supported inverse multiplexing capabilities such as max. OTSiG:OTSi cardinality"; } */ grouping transceiver-mode { description "This grouping is intended to be used for reporting the information of a transceiver's mode. The compatible-modes container shall be augmented with the proper leafrefs when used: see for example the transceiver-capabilities grouping below."; choice mode { mandatory true; description "Indicates whether the transceiver's mode is a standard mode, an organizational mode or an explicit mode."; case G.698.2 { uses standard-mode; uses common-standard-organizational-mode; } case organizational-mode { container organizational-mode { description "The set of attributes for an organizational mode"; uses organizational-mode; uses common-standard-organizational-mode; uses common-organizational-explicit-mode; } // container organizational-mode } case explicit-mode { container explicit-mode { description "The set of attributes for an explicit mode"; uses common-explicit-mode; uses common-organizational-explicit-mode; container compatible-modes { description "Container for all the standard and organizational modes supported by the transceiver's explicit mode."; } // container compatible-modes } // container explicit-mode } // end of case explicit-mode Belotti, et al. Expires 8 January 2024 [Page 32] Internet-Draft Yang for Layer 0 Types July 2023 } // end of choice } grouping transceiver-capabilities { description "This grouping is intended to be used for reporting the capabilities of a transceiver."; container supported-modes { presence "When present, it indicates that the modes supported by a transceiver are reported."; description "The top level container for the list supported transceiver's modes."; list supported-mode { key "mode-id"; config false; min-elements 1; description "The list of supported transceiver's modes."; leaf mode-id { type string { length "1..255"; } description "ID for the supported transceiver's mode."; } uses transceiver-mode { augment "mode/explicit-mode/explicit-mode/" + "compatible-modes" { description "Augments the compatible modes with the proper leafrefs."; leaf-list supported-application-codes { type leafref { path "../../../mode-id"; } must "../../../../" + "supported-mode[mode-id=current()]/" + "standard-mode" { description "The pointer is only for application codes supported by transceiver."; } description "List of pointers to the application codes supported by the transceiver's explicit mode."; } leaf-list supported-organizational-modes { Belotti, et al. Expires 8 January 2024 [Page 33] Internet-Draft Yang for Layer 0 Types July 2023 type leafref { path "../../../mode-id"; } must "../../../../" + "supported-mode[mode-id=current()]/" + "organizational-mode" { description "The pointer is only for organizational modes supported by transceiver."; } description "List of pointers to the organizational modes supported by the transceiver's explicit mode."; } } } } // list supported-modes } // container supported-modes } // grouping transceiver-capabilities grouping standard-mode { description "ITU-T G.698.2 standard mode that guarantees interoperability. It must be an string with the following format: B-DScW-ytz(v) where all these attributes are conformant to the ITU-T recomendation"; leaf standard-mode { type standard-mode; config false; description "G.698.2 standard mode"; } } grouping organizational-mode { description "Transponder operational mode supported by organizations or vendor"; leaf operational-mode { type operational-mode; config false; description "configured organization- or vendor-specific application identifiers (AI) supported by the transponder"; } leaf organization-identifier { Belotti, et al. Expires 8 January 2024 [Page 34] Internet-Draft Yang for Layer 0 Types July 2023 type organization-identifier; config false; description "organization identifier that uses organizational mode"; } } grouping penalty-value { description "A common definition of the penalty value used for describing multiple penalty types (.e.g, CD, PMD, PDL)."; leaf penalty-value { type union { type decimal64 { fraction-digits 2; range "0..max"; } type empty; } units "dB"; config false; mandatory true; description "The OSNR penalty associated with the related optical impairment at the receiver, when the value is known or an empty value when the value is not known."; } } /* * This grouping represent the list of attributes related to * optical impairment limits for explicit mode * (min OSNR, max PMD, max CD, max PDL, Q-factor limit, etc.) * In case of standard and operational mode the attributes are * implicit */ grouping common-explicit-mode { description "Attributes capabilities related to explicit mode of an optical transceiver"; leaf line-coding-bitrate { type identityref { base line-coding; } config false; description Belotti, et al. Expires 8 January 2024 [Page 35] Internet-Draft Yang for Layer 0 Types July 2023 "Bit rate/line coding of the optical tributary signal."; reference "ITU-T G.698.2 section 7.1.2"; } leaf bitrate { type uint16; units "Gbit/sec"; config false; description "The gross bitrate (e.g., 100, 200) of the optical tributary signal."; } leaf max-diff-group-delay { type uint32; units "ps"; config false; description "Maximum Differential group delay of this mode for this lane"; } leaf max-chromatic-dispersion { type decimal64 { fraction-digits 2; range "0..max"; } units "ps/nm"; config false; description "Maximum acceptable accumulated chromatic dispersion (CD) on the receiver"; } list cd-penalty { config false; description "Optional penalty associated with a given accumulated chromatic dispersion (CD) value. This list of pair cd and penalty values can be used to sample the function penalty = f(CD)."; leaf cd-value { type union { type decimal64 { fraction-digits 2; range "0..max"; } type empty; } units "ps/nm"; Belotti, et al. Expires 8 January 2024 [Page 36] Internet-Draft Yang for Layer 0 Types July 2023 config false; mandatory true; description "The Chromatic Dispersion (CD), when the value is known or an empty value when the value is not known."; } uses penalty-value; } leaf max-polarization-mode-dispersion { type decimal64 { fraction-digits 2; range "0..max"; } units "ps"; config false; description "Maximum acceptable accumulated polarization mode dispersion (PMD) on the receiver"; } list pmd-penalty { config false; description "Optional penalty associated with a given accumulated polarization mode dispersion (PMD) value. This list of pair pmd and penalty can be used to sample the function penalty = f(PMD)."; leaf pmd-value { type union { type decimal64 { fraction-digits 2; range "0..max"; } type empty; } units "ps"; config false; mandatory true; description "The Polarization Mode Dispersion (PMD), when the value is known or an empty value when the value is not known."; } uses penalty-value; } leaf max-polarization-dependant-loss { type loss-in-db-or-null; config false; mandatory true; Belotti, et al. Expires 8 January 2024 [Page 37] Internet-Draft Yang for Layer 0 Types July 2023 description "Maximum acceptable accumulated accumulated polarization dependent loss (PDL) on the receiver"; } list pdl-penalty { config false; description "Optional penalty associated with a given accumulated polarization dependent loss (PDL) value. This list of pair pdl and penalty values can be used to sample the function PDL = f(penalty)."; leaf pdl-value { type loss-in-db-or-null; config false; mandatory true; description "Maximum acceptable accumulated polarization dependent loss."; } uses penalty-value; } leaf available-modulation-type { type identityref { base modulation; } config false; description "Modulation type the specific transceiver in the list can support"; } leaf min-OSNR { type snr; units "dBm"; config false; description "min OSNR measured over 0.1 nm resolution bandwidth: if received OSNR at Rx-power reference point (rx-ref-channel-power) is lower than MIN-OSNR, an increased level of bit-errors post-FEC needs to be expected"; } leaf rx-ref-channel-power { type dbm-t; config false; description "The channel power used as reference for defining penalties and min-OSNR"; } Belotti, et al. Expires 8 January 2024 [Page 38] Internet-Draft Yang for Layer 0 Types July 2023 list rx-channel-power-penalty { config false; description "Optional penalty associated with a received power lower than rx-ref-channel-power. This list of pair power and penalty can be used to sample the function penalty = f(rx-channel-power)."; leaf rx-channel-power-value { type union { type dbm-t; type empty; } units "dBm"; config false; mandatory true; description "The Received Power, when the value is known or an empty value when the value is not known."; } uses penalty-value; } leaf min-Q-factor { type int32; units "dB"; config false; description "min Qfactor at FEC threshold"; } leaf available-baud-rate { type uint32; units "Bd"; config false; description "Baud-rate the specific transceiver in the list can support. Baud-rate is the unit for symbol rate or modulation rate in symbols per second or pulses per second. It is the number of distinct symbol changes (signal events) made to the transmission medium per second in a digitally modulated signal or a line code"; } leaf roll-off { type decimal64 { fraction-digits 4; range "0..1"; Belotti, et al. Expires 8 January 2024 [Page 39] Internet-Draft Yang for Layer 0 Types July 2023 } config false; description "the roll-off factor (beta with values from 0 to 1) identifies how the real signal shape exceed the baud rate. If=0 it is exactly matching the baud rate.If=1 the signal exceeds the 50% of the baud rate at each side."; } leaf min-carrier-spacing { type frequency-ghz; config false; description "This attribute specifies the minimum nominal difference between the carrier frequencies of two homogeneous OTSis (which have the same optical characteristics but the central frequencies) such that if they are placed next to each other the interference due to spectrum overlap between them can be considered negligible. In case of heterogeneous OTSi it is up to path computation engine to determine the minimum distance between the carrier frequency of the two adjacent OTSi."; } leaf available-fec-type { type identityref { base fec-type; } config false; description "Available FEC"; } leaf fec-code-rate { type decimal64 { fraction-digits 8; range "0..max"; } config false; description "FEC-code-rate"; } leaf fec-threshold { type decimal64 { fraction-digits 8; range "0..max"; } config false; description "Threshold on the BER, for which FEC is able to correct errors"; Belotti, et al. Expires 8 January 2024 [Page 40] Internet-Draft Yang for Layer 0 Types July 2023 } leaf in-band-osnr { type snr; config false; description "The OSNR defined within the bandwidth of the transmit spectral excursion (i.e., between the nominal central frequency of the channel and the -3.0dB points of the transmitter spectrum furthest from the nominal central frequency) measured at reference point Ss. The in-band OSNR is referenced to an optical bandwidth of 0.1nm @ 193.7 THz or 12.5 GHz."; reference "OIF-400ZR-01.0: Implementation Agreement 400ZR"; } leaf out-of-band-osnr { type snr; config false; description "The ratio of the peak transmitter power to the integrated power outside the transmitter spectral excursion. The spectral resolution of the measurement shall be better than the maximum spectral width of the peak. The out-of-band OSNR is referenced to an optical bandwidth of 0.1nm @ 193.7 THz or 12.5 GHz"; reference "OIF-400ZR-01.0: Implementation Agreement 400ZR"; } leaf tx-polarization-power-difference { type decimal-2-digits; units "dB"; config false; description "The transmitter polarization dependent power difference defined as the power difference between X and Y polarizations"; reference "OIF-400ZR-01.0: Implementation Agreement 400ZR"; } leaf polarization-skew { type decimal64 { fraction-digits 2; } units "ps"; config false; Belotti, et al. Expires 8 January 2024 [Page 41] Internet-Draft Yang for Layer 0 Types July 2023 description "The X-Y skew, included as a fixed value in the receiver polarization mode dispersion (PMD) tolerance limits."; reference "OIF-400ZR-01.0: Implementation Agreement 400ZR"; } } // grouping common-explicit-mode grouping common-standard-organizational-mode { description "Common attributes used by standard and organizational modes."; leaf-list line-coding-bitrate { type identityref { base line-coding; } config false; description "The list of the bit rate/line coding of the optical tributary signal supported by the transceiver. Reporting this list is optional when the standard or organization mode supports only one bit rate/line coding."; reference "ITU-T G.698.2 section 7.1.2"; } } // grouping common-standard-organizational-mode grouping common-organizational-explicit-mode { description "Common capability attributes limit range in case of operational mode and explicit mode. These attributes are supported separately in case of application codes"; /* transmitter tuning range (f_tx-min, f_tx-max) */ leaf min-central-frequency { type frequency-thz; config false; description "This parameter indicates the minimum frequency for the transmitter tuning range."; } leaf max-central-frequency { type frequency-thz; config false; description "This parameter indicates the maximum frequency for the Belotti, et al. Expires 8 January 2024 [Page 42] Internet-Draft Yang for Layer 0 Types July 2023 transmitter tuning range."; } leaf transceiver-tunability { type frequency-ghz; config false; description "This parameter indicates the transmitter frequency fine tuning steps e.g 3.125GHz or 0.001GHz."; } /* supported transmitter power range [p_tx-min, p_tx_max] */ leaf tx-channel-power-min { type dbm-t; config false; description "The minimum output power of this interface"; } leaf tx-channel-power-max { type dbm-t; config false; description "The maximum output power of this interface"; } /* supported receiver power range [p_rx-min, p_rx_max] */ leaf rx-channel-power-min { type dbm-t; config false; description "The minimum input power of this interface"; } leaf rx-channel-power-max { type dbm-t; config false; description "The maximum input power of this interface"; } leaf rx-total-power-max { type dbm-t; config false; description "Maximum rx optical power for all the channels"; } } // grouping common-organizational-explicit-mode /* This grouping represent the list of configured parameters */ /* values independent of operational mode */ Belotti, et al. Expires 8 January 2024 [Page 43] Internet-Draft Yang for Layer 0 Types July 2023 grouping common-transceiver-configured-param { description "Capability of an optical transceiver"; leaf line-coding-bitrate { type identityref { base line-coding; } config false; description "Bit rate/line coding of the optical tributary signal. Reporting this attribute is optional when the configured mode supports only one bit rate/line coding."; reference "ITU-T G.698.2 section 7.1.2"; } leaf tx-channel-power { type power-in-dbm-or-null; description "The current channel transmit power, when the value is known or an empty value when the value is not known. The empty value MUST NOT be used when this attribute is configured."; } leaf rx-channel-power { type power-in-dbm-or-null; config false; description "The current channel received power, when the value is known or an empty value when the value is not known."; } leaf rx-total-power { type power-in-dbm-or-null; config false; description "The current total received power, when the value is known or an empty value when the value is not known."; } } // grouping for configured attributes out of mode grouping l0-tunnel-attributes { description "Parameters for Layer0 (WSON or Flexi-Grid) Tunnels."; leaf bit-stuffing { type boolean; description "Bit stuffing enabled/disabled."; Belotti, et al. Expires 8 January 2024 [Page 44] Internet-Draft Yang for Layer 0 Types July 2023 } leaf wavelength-assignment { type identityref { base wavelength-assignment; } description "Wavelength Allocation Method"; } } grouping frequency-range { description "This grouping defines the lower and upper bounds of a frequency range (e.g., a band). This grouping SHOULD NOT be used to define a frequency slot, which SHOULD be defined using the n and m values instead."; leaf lower-frequency { type frequency-thz; mandatory true; description "The lower frequency boundary of the frequency range."; } leaf upper-frequency { type frequency-thz; must '. > ../lower-frequency' { error-message "The upper frequency must be greater than the lower frequency."; } mandatory true; description "The upper frequency boundary of the frequency range."; } } grouping l0-path-constraints { description "Common attribute for Layer 0 path constraints to be used by Layer 0 computation."; leaf gsnr-margin { type snr { range 0..max; } default 0; description "An additional margin to be added to the OSNR-min of the Belotti, et al. Expires 8 January 2024 [Page 45] Internet-Draft Yang for Layer 0 Types July 2023 transceiver when checking the estimated received Generalized SNR (GSNR)."; } } grouping l0-path-properties { description "Common attribute for reporting the Layer 0 computed path properties."; leaf estimated-gsnr { type snr; config false; description "The estimate received GSNR for the computed path."; } } } Figure 1: Layer 0 Types YANG module 4. Security Considerations The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446]. The Network Configuration Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. The NETCONF protocol over Secure Shell (SSH) specification [RFC6242] describes a method for invoking and running NETCONF within a Secure Shell (SSH) session as an SSH subsystem. Belotti, et al. Expires 8 January 2024 [Page 46] Internet-Draft Yang for Layer 0 Types July 2023 The objects in this YANG module are common data types and groupings. No object in this module can be read or written to. These definitions can be imported and used by other Layer 0 specific modules. It is critical to consider how imported definitions will be utilized and accessible via RPC operations, as the resultant schema will have data nodes that can be writable, or readable, and will have a significant effect on the network operations if used incorrectly or maliciously. All of these considerations belong in the document that defines the modules that import from this YANG module. Therefore, it is important to manage access to resultant data nodes that are considered sensitive or vulnerable in some network environments. The security considerations spelled out in the YANG 1.1 specification [RFC7950] apply for this document as well. 5. IANA Considerations For the following URI in the "IETF XML Registry" [RFC3688], IANA has updated the reference field to refer to this document: URI: urn:ietf:params:xml:ns:yang:ietf-layer0-types Registrant Contact: The IESG XML: N/A; the requested URI is an XML namespace. This document also adds an updated YANG module to the "YANG Module Names" registry [RFC7950]: Name: ietf-layer0-types Namespace: urn:ietf:params:xml:ns:yang:ietf-layer0-types Prefix: l0-types Reference: RFC XXXX RFC Editor Note: Please replace XXXX with the RFC number assigned to this document. 6. References 6.1. Normative References [I-D.ietf-teas-rfc8776-update] Busi, I., Guo, A., Liu, X., Saad, T., Beeram, V. P., and I. Bryskin, "Common YANG Data Types for Traffic Engineering", Work in Progress, Internet-Draft, draft- ietf-teas-rfc8776-update-04, 27 June 2023, . Belotti, et al. Expires 8 January 2024 [Page 47] Internet-Draft Yang for Layer 0 Types July 2023 [ITU-T_G.698.2] ITU-T Recommendation G.698.2, "Amplified multichannel dense wavelength division multiplexing applications with single channel optical interfaces", ITU-T G.698.2 , November 2018. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC4203] Kompella, K., Ed. and Y. Rekhter, Ed., "OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)", RFC 4203, DOI 10.17487/RFC4203, October 2005, . [RFC6163] Lee, Y., Ed., Bernstein, G., Ed., and W. Imajuku, "Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs)", RFC 6163, DOI 10.17487/RFC6163, April 2011, . [RFC6205] Otani, T., Ed. and D. Li, Ed., "Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers", RFC 6205, DOI 10.17487/RFC6205, March 2011, . [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . [RFC7698] Gonzalez de Dios, O., Ed., Casellas, R., Ed., Zhang, F., Fu, X., Ceccarelli, D., and I. Hussain, "Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks", RFC 7698, DOI 10.17487/RFC7698, November 2015, . [RFC7699] Farrel, A., King, D., Li, Y., and F. Zhang, "Generalized Labels for the Flexi-Grid in Lambda Switch Capable (LSC) Label Switching Routers", RFC 7699, DOI 10.17487/RFC7699, November 2015, . Belotti, et al. Expires 8 January 2024 [Page 48] Internet-Draft Yang for Layer 0 Types July 2023 [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018, . [RFC8363] Zhang, X., Zheng, H., Casellas, R., Gonzalez de Dios, O., and D. Ceccarelli, "GMPLS OSPF-TE Extensions in Support of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks", RFC 8363, DOI 10.17487/RFC8363, May 2018, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8795] Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and O. Gonzalez de Dios, "YANG Data Model for Traffic Engineering (TE) Topologies", RFC 8795, DOI 10.17487/RFC8795, August 2020, . 6.2. Informative References [I-D.ietf-ccamp-dwdm-if-param-yang] Galimberti, G., Kunze, R., Hiremagalur, D., and G. Grammel, "A YANG model to manage the optical interface parameters for an external transponder in a WDM network", Work in Progress, Internet-Draft, draft-ietf-ccamp-dwdm- if-param-yang-09, 13 March 2023, . Belotti, et al. Expires 8 January 2024 [Page 49] Internet-Draft Yang for Layer 0 Types July 2023 [ITU-T_G.694.1] ITU-T Recommendation G.694.1, "Spectral grids for WDM applications: DWDM frequency grid", ITU-T G.694.1 , October 2020. [ITU-T_G.694.2] ITU-T Recommendation G.694.2, "Spectral grids for WDM applications: CWDM wavelength grid", ITU-T G.694.2 , December 2003. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC7446] Lee, Y., Ed., Bernstein, G., Ed., Li, D., and W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", RFC 7446, DOI 10.17487/RFC7446, February 2015, . [RFC7581] Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and J. Han, "Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks", RFC 7581, DOI 10.17487/RFC7581, June 2015, . [RFC9093] Zheng, H., Lee, Y., Guo, A., Lopez, V., and D. King, "A YANG Data Model for Layer 0 Types", RFC 9093, DOI 10.17487/RFC9093, August 2021, . Appendix A. Changes from RFC 9093 To be added in a future revision of this draft. Acknowledgments The authors and the working group give their sincere thanks to Robert Wilton for the YANG doctor review and Tom Petch for his comments during the model and document development. This document was prepared using kramdown. Contributors Gabriele Galimberti Cisco Email: ggalimbe@cisco.com Belotti, et al. Expires 8 January 2024 [Page 50] Internet-Draft Yang for Layer 0 Types July 2023 Enrico Griseri Nokia Email: Enrico.Griseri@nokia.com Dhruv Dhody Huawei Email: dhruv.ietf@gmail.com Bin Yeong Yoon ETRI Email: byyun@etri.re.kr Ricard Vilalta CTTC Email: ricard.vilalta@cttc.es Young Lee Samsung Email: younglee.tx@gmail.com Victor Lopez Nokia Email: victor.lopez@nokia.com Authors' Addresses Sergio Belotti (editor) Nokia Email: sergio.belotti@nokia.com Italo Busi (editor) Huawei Email: italo.busi@huawei.com Dieter Beller (editor) Nokia Email: dieter.beller@nokia.com Belotti, et al. Expires 8 January 2024 [Page 51] Internet-Draft Yang for Layer 0 Types July 2023 Haomian Zheng Huawei Email: zhenghaomian@huawei.com Esther Le Rouzic Orange Email: esther.lerouzic@orange.com Aihua Guo Futurewei Technologies Email: aihuaguo.ietf@gmail.com Daniel King University of Lancaster Email: d.king@lancaster.ac.uk Belotti, et al. Expires 8 January 2024 [Page 52]