CCAMP Working Group Y. Lee Internet Draft H. Zheng Intended status: Standard Track Huawei Expires: March 1, 2019 August 31, 2018 A Yang Data Model for Impairment-Aware WSON Optical Networks draft-lee-ccamp-wson-impairment-yang-00 Abstract This document provides a YANG data model for the impairment-aware TE topology in wavelength switched optical networks (WSONs). Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. 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 March 1, 2019. Copyright Notice Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved. Lee, et al. Expires March 2019 [Page 1] Internet-Draft WSON Impairment-Aware YANG Model August 2018 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction...................................................2 1.1. Terminology...............................................3 1.2. Tree diagram..............................................3 1.3. Prefixes in Data Node Names...............................4 2. YANG Model (Tree Structure)....................................4 3. IETF-WSON-Topology YANG Model..................................6 4. Security Considerations.......................................16 5. IANA Considerations...........................................16 6. Acknowledgments...............................................16 7. References....................................................17 7.1. Normative References.....................................17 7.2. Informative References...................................17 8. Contributors..................................................18 Authors' Addresses...............................................18 1. Introduction In order to provision an optical connection (an optical path) through a WSON, a combination of path continuity, resource availability, and impairment constraints must be met to determine viable and optimal paths through the network. The determination of appropriate paths is known as Impairment-Aware Routing and Wavelength Assignment (IA-RWA) [RFC6566]. This document provides a YANG data model for the impairment-aware Traffic Engineering (TE) topology in wavelength switched optical networks (WSONs). The YANG model described in this document is a WSON technology-specific Yang model based on the information model developed in [RFC7446] and the two encoding documents [RFC7581] and [RFC7579] that developed protocol independent encodings based on [RFC7446]. The intent of this document is to provide a Yang data model, which can be utilized by an MDSC to collect states of WSON impairment data Lee, et al. Expires March 2019 [Page 2] Internet-Draft WSON Impairment-Aware YANG Model August 2018 from the Transport PNCs to enable impairment-aware optical path computation according to the ACTN Architecture [RFC8453]. The communication between controllers is done via a NETCONF [RFC8341]. This document augments the generic TE topology draft [TE-TOPO] and reuses groupings via importing other modules such as ietf-wson- topology and ietf-te-wson-types defined in [WSON-TOPO]. This document defines one YANG module: ietf-wson-impairment-topology (Section 3) according to the new Network Management Datastore Architecture [RFC8342]. 1.1. Terminology Refer to [RFC4847] and [RFC5253] for the key terms used in this document. The following terms are defined in [RFC7950] and are not redefined here: o client o server o augment o data model o data node The following terms are defined in [RFC6241] and are not redefined here: o configuration data o state data The terminology for describing YANG data models is found in [RFC7950]. 1.2. Tree diagram A simplified graphical representation of the data model is used in Section 2 of this this document. The meaning of the symbols in these diagrams is defined in [RFC8340]. Lee, et al. Expires March 2019 [Page 3] Internet-Draft WSON Impairment-Aware YANG Model August 2018 1.3. Prefixes 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, as shown in Table 1. +---------------+-------------------------------+------------+ | Prefix | YANG module | Reference | +---------------+-------------------------------+------------+ | wson-imp-topo | ietf-wson-impairment-topology | [RFC XXXX] | +---------------+-------------------------------+------------+ Table 1: Prefixes and corresponding YANG modules Note: The RFC Editor will replace XXXX with the number assigned to the RFC once this draft becomes an RFC. 2. YANG Model (Tree Structure) module: ietf-wson-impairment-topology augment /nw:networks/nw:network/nw:network-types/tet:te-topology: +--rw wson-impairment-topology! augment /nw:networks/nw:network/nt:link/tet:te/tet:te-link-attributes: +--ro power? int32 augment /nw:networks/nw:network/nt:link/tet:te/tet:te-link- attributes/tet:underlay/tet:primary-path/tet:path- element/tet:type/tet:label/tet:label-hop/tet:te-label/tet:technology: +--:(wson-imp-topo) +--rw (grid-type)? | +--:(dwdm) | | +--ro channel-freq? decimal64 | +--:(cwdm) | +--ro channel-wavelength? uint32 +--ro bit-rate? decimal64 +--ro BER? decimal64 +--ro pmd? decimal64 +--ro cd? decimal64 +--ro osnr? decimal64 +--ro q-factor? decimal64 augment /nw:networks/nw:network/nt:link/tet:te/tet:te-link- attributes/tet:underlay/tet:backup-path/tet:path- element/tet:type/tet:label/tet:label-hop/tet:te-label/tet:technology: +--:(wson-imp-topo) +--rw (grid-type)? Lee, et al. Expires March 2019 [Page 4] Internet-Draft WSON Impairment-Aware YANG Model August 2018 | +--:(dwdm) | | +--ro channel-freq? decimal64 | +--:(cwdm) | +--ro channel-wavelength? uint32 +--ro bit-rate? decimal64 +--ro BER? decimal64 +--ro pmd? decimal64 +--ro cd? decimal64 +--ro osnr? decimal64 +--ro q-factor? decimal64 augment /nw:networks/tet:te/tet:templates/tet:link-template/tet:te-link- attributes/tet:underlay/tet:primary-path/tet:path- element/tet:type/tet:label/tet:label-hop/tet:te-label/tet:technology: +--:(wson-imp-topo) +--rw (grid-type)? | +--:(dwdm) | | +--ro channel-freq? decimal64 | +--:(cwdm) | +--ro channel-wavelength? uint32 +--ro bit-rate? decimal64 +--ro BER? decimal64 +--ro pmd? decimal64 +--ro cd? decimal64 +--ro osnr? decimal64 +--ro q-factor? decimal64 augment /nw:networks/tet:te/tet:templates/tet:link-template/tet:te-link- attributes/tet:underlay/tet:backup-path/tet:path- element/tet:type/tet:label/tet:label-hop/tet:te-label/tet:technology: +--:(wson-imp-topo) +--rw (grid-type)? | +--:(dwdm) | | +--ro channel-freq? decimal64 | +--:(cwdm) | +--ro channel-wavelength? uint32 +--ro bit-rate? decimal64 +--ro BER? decimal64 +--ro pmd? decimal64 +--ro cd? decimal64 +--ro osnr? decimal64 +--ro q-factor? decimal64 augment /nw:networks/nw:network/nw:node/tet:te/tet:te-node-attributes: +--rw wson-node +--rw node-type? identityref augment /nw:networks/nw:network/nw:node/tet:te/tet:tunnel-termination-point: +--ro available-modulation* identityref +--ro modulation-enabled? boolean +--ro modulation-type? identityref +--ro available-FEC* identityref +--ro FEC-enabled? boolean Lee, et al. Expires March 2019 [Page 5] Internet-Draft WSON Impairment-Aware YANG Model August 2018 +--ro FEC-type? identityref +--ro FEC-code-rate? decimal64 +--ro FEC-threshold? decimal64 augment /nw:networks/nw:network/nw:node/tet:te/tet:tunnel-termination-point: +--ro transponder-list* [carrier-id] +--ro carrier-id uint32 3. IETF-WSON-Topology YANG Model file "ietf-wson-impairment-topology@2018-08-31.yang" module ietf-wson-impairment-topology { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-wson-impairment-topology"; prefix "wson-imp-topo"; import ietf-network { prefix "nw"; } import ietf-network-topology { prefix "nt"; } import ietf-te-topology { prefix "tet"; } import ietf-wson-topology { prefix "wson"; } import ietf-te-wson-types { prefix "te-wson-types"; } organization "IETF CCAMP Working Group"; contact "Editor: Young Lee "; description "This module contains a collection of YANG definitions for Lee, et al. Expires March 2019 [Page 6] Internet-Draft WSON Impairment-Aware YANG Model August 2018 Impairment-aware RWA WSON. Copyright (c) 2018 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 2018-08-31{ description "version 0."; reference "RFC XXX: A Yang Data Model for Impairment-aware WSON Optical Networks "; } identity modulation { description "base identity for modulation type"; } 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 QAM16 { base modulation; description "QAM16 (Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } identity DP_QAM16 { base modulation; description "DP-QAM16 (Dual Polarization Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } identity DC_DP_QAM16 { base modulation; Lee, et al. Expires March 2019 [Page 7] Internet-Draft WSON Impairment-Aware YANG Model August 2018 description "DC DP-QAM16 (Dual Polarization Quadrature Amplitude Modulation - 4 bits per symbol) modulation"; } identity FEC { description "Enumeration that defines the type of Forward Error Correction"; } identity reed-solomon { base FEC; description "Reed-Solomon error correction"; } identity hamming-code { base FEC; description "Hamming Code error correction"; } identity golay { base FEC; description "Golay error correction"; } grouping wson-label { description "Generic label for WSON links and paths"; choice grid-type { description "Label for DWDM or CWDM grid"; case dwdm { leaf channel-freq { type decimal64 { fraction-digits 5; } units THz; config false; description "The DWDM frequency in THz, e.g. 193.12500"; reference "RFC6205"; } } case cwdm { Lee, et al. Expires March 2019 [Page 8] Internet-Draft WSON Impairment-Aware YANG Model August 2018 leaf channel-wavelength { type uint32; units nm; config false; description "The CWDM wavelength in nanometer, e.g. 1511"; reference "RFC6205"; } } } } grouping transponder-attributes { description "Configuration of an optical transponder"; leaf-list available-modulation { type identityref { base modulation; } config false; description "List determining all the available modulations"; } leaf modulation-enabled { type boolean; config false; description "Determines whether the modulation is enabled or not"; } leaf modulation-type { type identityref { base modulation; } config false; description "Modulation type of the transponder"; } leaf-list available-FEC { type identityref { base FEC; } config false; description "List determining all the available FEC"; } leaf FEC-enabled { type boolean; Lee, et al. Expires March 2019 [Page 9] Internet-Draft WSON Impairment-Aware YANG Model August 2018 config false; description "Determines whether the FEC is enabled or not"; } leaf FEC-type { type identityref { base FEC; } config false; description "FEC type of the transponder"; } 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"; } } grouping sliceable-transponder-attributes { description "Configuration of a sliceable transponder."; list transponder-list { key "carrier-id"; config false; description "List of carriers"; leaf carrier-id { type uint32; config false; description "Identifier of the carrier"; } } } grouping wson-node-attributes { description "WSON node attributes"; Lee, et al. Expires March 2019 [Page 10] Internet-Draft WSON Impairment-Aware YANG Model August 2018 container wson-node { description "WSON node attrtibutes."; leaf node-type { type identityref { base te-wson-types:wson-node-type; } description "WSON node type."; } } } grouping wson-fiber-data { description "WSON link (fiber) attributes with impairment data"; leaf power { type int32; units "dBm"; config false; description "Input Power Level of the receiver side of the link"; } } grouping wson-impairement-data { description "WSON impairment data per wavelength"; leaf bit-rate { type decimal64 { fraction-digits 8; range "0..max"; } units "Gbit/s"; config false; description "Gross bit rate"; } leaf BER { type decimal64 { fraction-digits 18; range "0..max"; } config false; description "BER"; } leaf pmd { type decimal64 { fraction-digits 8; range "0..max"; } units "ps/(km)^0.5"; config false; Lee, et al. Expires March 2019 [Page 11] Internet-Draft WSON Impairment-Aware YANG Model August 2018 description "Polarization Mode Dispersion"; } leaf cd { type decimal64 { fraction-digits 5; } units "ps/nm/km"; config false; description "Cromatic Dispersion"; } leaf osnr { type decimal64 { fraction-digits 5; } units "dB"; config false; description "osnr"; } leaf q-factor { type decimal64 { fraction-digits 5; } units "dB"; config false; description "q-factor"; } } /* grouping wson-ttp-attributes { description "WSON tunnel termination point (e.g.tranponder) attributes"; leaf-list available-operational-mode { type te-wson-types:operational-mode; description "List of all vendor-specific supported mode identifiers"; } leaf operational-mode { type te-wson-types:operational-mode; description "Vendor-specific mode identifier"; } } */ /* Data nodes */ Lee, et al. Expires March 2019 [Page 12] Internet-Draft WSON Impairment-Aware YANG Model August 2018 augment "/nw:networks/nw:network/nw:network-types" + "/tet:te-topology" { description "wson-impairment topology augmented"; container wson-impairment-topology { presence "indicates an impairment-aware topology of wson"; description "Container to identify impairment-aware wson topology type"; } } augment "/nw:networks/nw:network/nt:link/tet:te" + "/tet:te-link-attributes" { when "/nw:networks/nw:network/nw:network-types" +"/tet:te-topology/wson-imp-topo:wson-impairment-topology" { description "This augment is only valid for WSON Impairment."; } description "WSON Link augmentation for impairment data."; uses wson-fiber-data; } /* Augment label hop of underlay primary path of TE link */ augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:underlay/tet:primary-path/tet:path-element/tet:type/" + "tet:label/tet:label-hop/tet:te-label/tet:technology" { when "../../../../../../../../" + "nw:network-types/tet:te-topology/" + "wson:wson-topology" { description "Augment WSON TE label"; } description "WSON label."; case wson-imp-topo { uses wson-label; uses wson-impairement-data; } } /* Augment label hop of underlay backup path of TE link */ augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:underlay/tet:backup-path/tet:path-element/tet:type/" + "tet:label/tet:label-hop/tet:te-label/tet:technology" { when "../../../../../../../../" + "nw:network-types/tet:te-topology/" + "wson:wson-topology" { description "Augment WSON TE label"; Lee, et al. Expires March 2019 [Page 13] Internet-Draft WSON Impairment-Aware YANG Model August 2018 } description "WSON label."; case wson-imp-topo { uses wson-label; uses wson-impairement-data; } } /* Augment label hop of underlay primary path of TE link template */ augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:underlay/tet:primary-path/tet:path-element/tet:type/" + "tet:label/tet:label-hop/tet:te-label/tet:technology" { /* when "../../../../../../../../../" + "nw:network-types/tet:te-topology/" + "wson:wson-topology" { description "Augment WSON TE label"; } */ description "WSON label."; case wson-imp-topo { uses wson-label; uses wson-impairement-data; } } /* Augment label hop of underlay backup path of TE link template */ augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:underlay/tet:backup-path/tet:path-element/tet:type/" + "tet:label/tet:label-hop/tet:te-label/tet:technology" { /* when "../../../../../../../../../" + "nw:network-types/tet:te-topology/" + "wson:wson-topology" { description "Augment WSON TE label"; } */ description "WSON label."; case wson-imp-topo { uses wson-label; uses wson-impairement-data; } } Lee, et al. Expires March 2019 [Page 14] Internet-Draft WSON Impairment-Aware YANG Model August 2018 augment "/nw:networks/nw:network/nw:node/tet:te" + "/tet:te-node-attributes" { when "/nw:networks/nw:network/nw:network-types" +"/tet:te-topology/wson:wson-topology" { description "This augment is only valid for WSON."; } description "WSON Node augmentation."; uses wson-node-attributes; } augment "/nw:networks/nw:network/nw:node/tet:te" + "/tet:tunnel-termination-point" { when "/nw:networks/nw:network/nw:network-types" +"/tet:te-topology/wson-imp-topo:wson-impairment-topology" { description "This augment is only valid for Impairment WSON with non-sliceable transponder model"; } description "WSON tunnel termination point augmentation for non-sliceabletransponder model."; /* uses wson-ttp-attributes; */ uses transponder-attributes; } augment "/nw:networks/nw:network/nw:node/tet:te" + "/tet:tunnel-termination-point" { when "/nw:networks/nw:network/nw:network-types" +"/tet:te-topology/wson-imp-topo:wson-impairment-topology" { description "This augment is only valid for Impairment WSON with sliceable transponder model"; } description "WSON tunnel termination point augmentation for sliceabletransponder model."; uses sliceable-transponder-attributes; } } Lee, et al. Expires March 2019 [Page 15] Internet-Draft WSON Impairment-Aware YANG Model August 2018 4. Security Considerations The configuration, state, and action data defined in this document are designed to be accessed via a management protocol with a secure transport layer, such as NETCONF [RFC6241]. The NETCONF access control model [RFC6536] provides the means to restrict access for particular NETCONF users to a preconfigured subset of all available NETCONF protocol operations and content. A number of configuration data nodes defined in this document are read-only; however, these data nodes may be considered sensitive or vulnerable in some network environments. 5. IANA Considerations This document registers the following namespace URIs in the IETF XML registry [RFC3688]: -------------------------------------------------------------------- URI: urn:ietf:params:xml:ns:yang:ietf-wson-impairment-topology Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. -------------------------------------------------------------------- This document registers the following YANG modules in the YANG Module Names registry [RFC7950]: -------------------------------------------------------------------- name: ietf-wson-impairment-topology namespace: urn:ietf:params:xml:ns:yang:ietf-wson-impairment- topology reference: RFC XXXX (TDB) -------------------------------------------------------------------- 6. Acknowledgments This document was prepared using 2-Word-v2.0.template.dot. Lee, et al. Expires March 2019 [Page 16] Internet-Draft WSON Impairment-Aware YANG Model August 2018 7. References 7.1. Normative References 7.2. Informative References [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, June 2011. [RFC6566] Y. Lee, G. Bernstein, D. Li, G. Martinelli, "A Framework for the Control of Wavelength Switched Optical Networks (WSONs) with Impairments", RFC 6566, March 2012. [RFC7446] Y. Lee, G. Bernstein, D. Li, W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", RFC 7446, Feburary 2015. [RFC7579] G. Bernstein, Y. Lee, D. Li, W. Imajuku, "General Network Element Constraint Encoding for GMPLS Controlled Networks", RFC 7579, June 2015. [RFC7581] G. Bernstein, Y. Lee, D. Li, W. Imajuku, "Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks", RFC 7581, June 2015. [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, August 2016. [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", RFC 8341, March 2018. [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, March 2018. [TE-TOPO] X. Liu, et al., "YANG Data Model for TE Topologies", work in progress: draft-ietf-teas-yang-te-topo. [RFC8453] Ceccarelli, D. and Y. Lee, "Framework for Abstraction and Control of Traffic Engineered Networks", RFC 8453, August 2018. Lee, et al. Expires March 2019 [Page 17] Internet-Draft WSON Impairment-Aware YANG Model August 2018 8. Contributors Authors' Addresses Young Lee Huawei Technologies 5700 Tennyson Parkway, Suite 600 Plano, TX 75024 USA Phone: (469) 277-5838 Email: leeyoung@huawei.com Haomian Zheng Huawei Technologies Email: zhenghaomian@huawei.com Lee, et al. Expires March 2019 [Page 18]