Internet Engineering Task Force G.Galimberti, Ed. Internet-Draft Cisco Intended status: Informational R.Kunze Expires: July 4, 2018 Deutsche Telekom D. Hiremagalur, Ed. G. Grammel, Ed. Juniper December 31, 2017 A YANG model to manage the optical parameters for in a WDM network draft-galimbe-ccamp-iv-yang-04 Abstract This memo defines a Yang model that translate the information model to support Impairment-Aware (IA) Routing and Wavelength Assignment (RWA) functionality. The information model is defined in draft-ietf- ccamp-wson-iv-info and draft-martinelli-ccamp-wson-iv-encode. This document defines proper encoding and extend to the models defined in draft-lee-ccamp-wson-yang tu support Impairment-Aware (IA) Routing and Wavelength Assignment (RWA) functions The Yang model defined in this memo can be used for Optical Parameters monitoring and/or configuration of the multivendor Endpoints and ROADMs Copyright Notice Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved. 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 July 4, 2018. G.Galimberti, et al. Expires July 4, 2018 [Page 1] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 Copyright Notice Copyright (c) 2017 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 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 . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The Internet-Standard Management Framework . . . . . . . . . 3 3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 4 4. Definition . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. Applicability . . . . . . . . . . . . . . . . . . . . . . . . 4 6. Properties . . . . . . . . . . . . . . . . . . . . . . . . . 4 7. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.1. Optical Parameters Description . . . . . . . . . . . . . 5 7.1.1. Optical path from point Ss to Rs . . . . . . . . . . 6 7.1.2. Rs and Ss Configuration . . . . . . . . . . . . . . . 7 7.1.3. Table of Application Codes . . . . . . . . . . . . . 7 7.2. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . 7 7.3. Optical Parameters for impairment validation in a WDM network . . . . . . . . . . . . . . . . . . . . . . . . . 7 8. Structure of the Yang Module . . . . . . . . . . . . . . . . 8 9. Yang Module . . . . . . . . . . . . . . . . . . . . . . . . . 8 10. Security Considerations . . . . . . . . . . . . . . . . . . . 17 11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17 12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17 13. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 17 14. References . . . . . . . . . . . . . . . . . . . . . . . . . 18 14.1. Normative References . . . . . . . . . . . . . . . . . . 18 14.2. Informative References . . . . . . . . . . . . . . . . . 20 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 21 Appendix B. Open Issues . . . . . . . . . . . . . . . . . . . . 21 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21 G.Galimberti, et al. Expires July 4, 2018 [Page 2] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 1. Introduction This memo defines a Yang model that translates the existing mib module defined in draft-ietf-ccamp-wson-iv-info and draft-martinelli- ccamp-wson-iv-encode to provide the network impairment information to an SDN controller. One of the key SDN controller features is to support multi vendor network and support the service calculation and deployment in multilayer topologies, for the DWDM layer it is fundamentad that the SDN controller is aware of the optical impairments to verify the feasibility of new circuits before their provisioning. Although SDN controller will not apply exhaustive and accurate algorithms and the optical channel feasibility verification may have a degree of unreliability this function can work on a multivendor common set of parameter and algorithms to ensure the operator the best change to set a circuit. This document follows the same impairment definition and applicability of draft-ietf-ccamp- wson-iv-info. The optical impairments related to the DWDM Transceiver are described by draft draft-dharini-ccamp-if-param-yang. Applications are defined in G.698.2 [ITU.G698.2] using optical interface parameters at the single-channel connection points between optical transmitters and the optical multiplexer, as well as between optical receivers and the optical demultiplexer in the DWDM system. This Recommendation uses a methodology which explicitly specify the details of the optical network between reference point Ss and Rs, e.g., the passive and active elements or details of the design. This draft refers and supports the draft-ietf-ccamp-dwdm-if-mng-ctrl- fwk The building of a yang model describing the optical parameters allows the different vendors and operator to retrieve, provision and exchange information across multi-vendor domains in a standardized way. In addition to the parameters specified in ITU recommendations the Yang models support also the "vendor specific parameters". 2. The Internet-Standard Management Framework For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410]. This memo specifies a Yang model for optical interfaces. G.Galimberti, et al. Expires July 4, 2018 [Page 3] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 3. Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119] In the description of OIDs the convention: Set (S) Get (G) and Trap (T) conventions will describe the action allowed by the parameter. 4. Definition For a detailed definition this draft refers to draft-ietf-ccamp-wson- iv-info. 5. Applicability This document targets at Scenario C defined in [RFC6566] section 4.1.1. as approximate impairment estimation. The Approximate concept refer to the fact that this Information Model covers information mainly provided by [ITU.G680] Computational Model. Although the [RFC6566] provides no or little approximation the parameters described in this draft can be applied to the algorithms verifying the circuit feasibility in the new coherent non compensated DWDM networks In this case the impairments verification can reach a good reliability and accuracy. This draft does not address computational matters but provides all the information suitable to cover most of the full coherent network algoritms, not being exhaustive the information can give a acceptable or even good approximation in therm of connection feasibility. This may not be true for legacy compensated network. 6. Properties For the signal properties this traft refers the draft-ietf-ccamp- wson-iv-info Ch.2.3 with some extension of the parameters. 7. Overview G.Galimberti, et al. Expires July 4, 2018 [Page 4] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 Figure 1 shows a set of reference points, for single-channel connection between transmitters (Tx) and receivers (Rx). Here the DWDM network elements include an OM and an OD (which are used as a pair with the opposing element), one or more optical amplifiers and may also include one or more OADMs. +-------------------------------------------------+ Ss | DWDM Network | Rs +--+ | | | \ / | | | +--+ Tx L1--|->| \ / |--|-->Rx L1 +---+ | | | +------+ | | | +--+ +---+ | | | | | | | | +--+ Tx L2--|->| OM |------------>|ROADM |-- -------->| OD |--|-->Rx L2 +---+ | | | DWDM | | DWDM | | | +--+ +---+ | | | Link +------+ Link | | | +--+ Tx L3--|->| / | ^ \ |--|-->Rx L3 +---+ | | / | | \ | | +--+ +-----------------------|--|----------------------+ +--+ +--+ | | Rs v | Ss +-----+ +-----+ |RxLx | |TxLx | +-----+ +-----+ Ss = reference point at the DWDM network element tributary output Rs = reference point at the DWDM network element tributary input Lx = Lambda x OM = Optical Mux OD = Optical Demux ROADM = Reconfigurable Optical Add Drop Mux from Fig. 5.1/G.698.2 Figure 1: External transponder in WDM netwoks 7.1. Optical Parameters Description The link between the external transponders through a WDM network media channels are managed at the edges, i.e. at the transmitters (Tx) and receivers (Rx) attached to the S and R reference points respectively. The set of parameters that could be managed are defined by the "application code" notation The definitions of the optical parameters are provided below to increase the readability of the document, where the definition is G.Galimberti, et al. Expires July 4, 2018 [Page 5] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 ended by (R) the parameter can be retrieve with a read, when (W) it can be provisioned by a write, (R,W) can be either read or written. 7.1.1. Optical path from point Ss to Rs The following parameters for the optical path from point S and R are defined in G.698.2 [ITU.G698.2]. Maximum and minimum (residual) chromatic dispersion: These parameters define the maximum and minimum value of the optical path "end to end chromatic dispersion" (in ps/nm) that the system shall be able to tolerate. (R) Minimum optical return loss at Ss: These parameter defines minimum optical return loss (in dB) of the cable plant at the source reference point (Ss), including any connectors (R) Maximum discrete reflectance between Ss and Rs: Optical reflectance is defined to be the ratio of the reflected optical power present at a point, to the optical power incident to that point. Control of reflections is discussed extensively in ITU-T Rec. G.957 (R) Maximum differential group delay: Differential group delay (DGD) is the time difference between the fractions of a pulse that are transmitted in the two principal states of polarization of an optical signal. For distances greater than several kilometres, and assuming random (strong) polarization mode coupling, DGD in a fibre can be statistically modelled as having a Maxwellian distribution. (R) Maximum polarization dependent loss: The polarization dependent loss (PDL) is the difference (in dB) between the maximum and minimum values of the channel insertion loss (or gain) of the black link from point SS to RS due to a variation of the state of polarization (SOP) over all SOPs. (R) Maximum inter-channel crosstalk: Inter-channel crosstalk is defined as the ratio of total power in all of the disturbing channels to that in the wanted channel, where the wanted and disturbing channels are at different wavelengths. The parameter specify the isolation of a link conforming to the "black link" approach such that under the worst- case operating conditions the inter-channel crosstalk at any reference point RS is less than the maximum inter-channel crosstalk value (R) G.Galimberti, et al. Expires July 4, 2018 [Page 6] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 Maximum interferometric crosstalk: This parameter places a requirement on the isolation of a link conforming to the "black link" approach such that under the worst case operating conditions the interferometric crosstalk at any reference point RS is less than the maximum interferometric crosstalk value. (R) Maximum optical path OSNR penalty: The optical path OSNR penalty is defined as the difference between the Lowest OSNR at Rs and Lowest OSNR at Ss that meets the BER requirement (R) Maximum ripple: Although is defined in G.698.2 (R). 7.1.2. Rs and Ss Configuration For the Rs and Ss configuration this draft refers the draft-dharini- ccamp-dwdm-if-param-yang while for the Rs-Ss extended parameters for coherent transmission interfaces refer to draft-dharini-ccamp-dwdm- if-param-yang 7.1.3. Table of Application Codes For Application Codes configuration this draft refers the draft- dharini-ccamp-dwdm-if-param-yang 7.2. Use Cases The use cases are described in draft-ietf-ccamp-dwdm-if-mng-ctrl-fwk 7.3. Optical Parameters for impairment validation in a WDM network The ietf-opt-parameters-wdm is an augment to the ????. It allows the user to get and set the application Optical Parameters of a DWDM network. module: ietf-opt-parameters-wdm +--rw gain-degrade-high? dbm-t augment /if:interfaces/if:interface: +--rw optical-transport +--rw attenuator-value? attenuator-t +--rw offset? decimal64 +--rw channel-power-ref? decimal64 +--rw tilt-calibration? tilt-t G.Galimberti, et al. Expires July 4, 2018 [Page 7] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 8. Structure of the Yang Module ietf-opt-parameters-wdm is a top level model for the support of this feature. 9. Yang Module The ietf-opt-parameters-wdm is defined as an extension to ietf interfaces ????. file "ietf-opt-parameters-wdm.yang" module ietf-opt-parameters-wdm { namespace "urn:ietf:params:xml:ns:yang:ietf-opt-parameters-wdm"; prefix iietf-opt-parameters-wdm; import ietf-interfaces { prefix if; } import iana-if-type { prefix ianaift; } organization "IETF CCAMP Working Group"; contact "WG Web: WG List: Editor: Gabriele Galimberti "; description "This module contains a collection of YANG definitions for collecting and configuring Optical Parameters in Optical Networks and calculate the circuit feasibility. Copyright (c) 2016 IETF Trust and the persons identified as authors of the code. All rights reserved. G.Galimberti, et al. Expires July 4, 2018 [Page 8] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 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 "2016-10-30" { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for Optical Paramenters of DWDM Networks "; } typedef tilt-t { type decimal64 { fraction-digits 2; range "-5..5"; } description "Tilt Type"; } typedef signal-output-power-t { type decimal64 { fraction-digits 2; range "-10..30"; } description " Amplifier Power provisioning "; } typedef active-channel-t { type union { type uint8 { range "0..200"; } } description " Number of channels active on a span - and on an amplifier"; } typedef dbm-t { type decimal64 { G.Galimberti, et al. Expires July 4, 2018 [Page 9] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 fraction-digits 2; range "-50..-30 | -10..5 | 10000000"; } description " Amplifier Power in dBm "; } typedef attenuator-t { type decimal64 { fraction-digits 2; range "-15..-5"; } description " Attenuation value (attenuator) applied after the Amplifier"; } augment "/if:interfaces/if:interface" { when "if:type = 'ianaift:opticalTransport'" { description "Specific optical-transport Interface Data"; } description "Specific optical-transport Interface Data"; container optical-transport { description "Specific optical-transport Data"; leaf attenuator-value { type attenuator-t; description "External attenuator value "; } leaf offset { type decimal64 { fraction-digits 2; range "-30..30"; } description "Raman and power amplifiers offset"; } leaf channel-power-ref { type decimal64 { fraction-digits 2; range "-10..15"; } description "Optical power per channel"; } leaf tilt-calibration { type tilt-t; description "Amplifier Tilt tuning"; G.Galimberti, et al. Expires July 4, 2018 [Page 10] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 } } } grouping opwr-threshold-warning-grp { description " Minimum Optical Power threshold - this is used to rise Power alarm "; leaf opwr-min { type dbm-t; units "dBm"; default -1; description "Minimum Power Value"; } leaf opwr-min-clear { type dbm-t; units "dBm"; default -1; description "threshold to clear Minimum Power value Alarm"; } leaf opwr-max { type dbm-t; units "dBm"; default 1; description " Maximum Optical Power threshold - this is used to rise Power alarm "; } } grouping gain-degrade-alarm-grp { description " Low Optical Power gain threshold - this is used to rise Power alarm "; leaf gain-degrade-low { type dbm-t; units "dBm"; default -1; description "Low Gain Degrade Value"; } } leaf gain-degrade-high { type dbm-t; G.Galimberti, et al. Expires July 4, 2018 [Page 11] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 units "dBm"; default 1; description " High Optical Power gain threshold - this is used to rise Power alarm "; } } grouping power-degrade-high-alarm-grp { description " High Optical Power gain alarm "; leaf gain-degrade-high { type dbm-t; units "dBm"; default 1; description "Low Gain Degrade Value"; } } grouping power-degrade-low-alarm-grp { description " Low Optical Power gain alarm "; leaf power-degrade-low { type dbm-t; units "dBm"; default -1; description "High Gain Degrade Value"; } } grouping noise { leaf noise { type decimal64 { fraction-digits 2; } units "dB"; description "Noise feasibility - reference ITU-T G.680 OSNR added to the signal by the OMS. The noise is intended per channel and is independent of the number of active channels in OMS"; } description "Noise feasibility"; } grouping noise-sigma { G.Galimberti, et al. Expires July 4, 2018 [Page 12] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 leaf noise-sigma { type decimal64 { fraction-digits 2; } units "dB"; description "Noise Sigma feasibility - accuracy of the OSNR added to the signal by the OMS"; } description "Noise Sigma feasibility"; } grouping chromatic-dispersion { leaf chromatic-dispersion { type decimal64 { fraction-digits 2; } units "ps/nm"; description "Chromatic Dispersion (CD) related to the OMS"; } description "Chromatic Dispersion (CD) feasibility"; } grouping chromatic-dispersion-slope { leaf chromatic-dispersion-slope { type decimal64 { fraction-digits 2; } units "ps/nm^2"; description "Chromatic Dispersion (CD) Slope related to the OMS"; } description "Chromatic Dispersion (CD) Slope feasibility"; } grouping pmd { leaf pmd { type decimal64 { fraction-digits 2; } units "ps"; description "Polarization Mode Dispersion (PMD) relared to OMS"; } description "Polarization Mode Dispersion (PMD) feasibility"; } grouping pdl { G.Galimberti, et al. Expires July 4, 2018 [Page 13] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 leaf pdl { type decimal64 { fraction-digits 2; } units "dB"; description "Polarization Dependent Loss (PDL) related to the OMS"; } description "Polarization Dependent Loss (PDL) feasibility"; } grouping drop-power { leaf drop-power { type decimal64 { fraction-digits 2; } units "dBm"; description "Drop Power value at the DWDM Transceiver RX side"; } description "Drop Power feasibility"; } grouping drop-power-sigma { leaf drop-power-sigma { type decimal64 { fraction-digits 2; } units "db"; description "Drop Power Sigma value at the DWDM Transceiver RX side"; } description "Drop Power Sigma feasibility"; } grouping ripple { leaf ripple { type decimal64 { fraction-digits 2; } units "db"; description "Channel Ripple"; } description "Channel Ripple"; } grouping ch-noise-figure { list ch-noise-figure { G.Galimberti, et al. Expires July 4, 2018 [Page 14] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 description "Channel signal-spontaneous noise figure"; leaf input-to-output { type decimal64 { fraction-digits 2; } units "dB"; description "from input port to output port"; } leaf input-to-drop { type decimal64 { fraction-digits 2; } units "dB"; description "from input port to drop port"; } leaf add-to-output { type decimal64 { fraction-digits 2; } units "dB"; description "from add port to output port"; } } description "Channel signal-spontaneous noise figure"; } grouping dgd { leaf dgd { type decimal64 { fraction-digits 2; } units "db"; description "differential group delay"; } description "differential group delay"; } grouping ch-isolation { list ch-isolation { description "adjacent and not adjacent channel isolation"; leaf ad-ch-isol { type decimal64 { fraction-digits 2; } G.Galimberti, et al. Expires July 4, 2018 [Page 15] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 units "dB"; description "adjecent channel isolation"; } leaf no-ad-ch-iso { type decimal64 { fraction-digits 2; } units "dB"; description "non adjecent channel isolation"; } } description "djacent and not adjacent channel isolation"; } grouping ch-extinction { leaf cer { type decimal64 { fraction-digits 2; } units "db"; description "channel extinction"; } description "channel extinction"; } grouping att-coefficient { leaf att { type decimal64 { fraction-digits 2; } units "db"; description "Attenuation coefficient (for a fibre segment)"; } description "Attenuation coefficient (for a fibre segment)"; } } } G.Galimberti, et al. Expires July 4, 2018 [Page 16] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 10. Security Considerations The YANG module defined in this memo is designed to be accessed via the NETCONF protocol [RFC6241]. he lowest NETCONF layer is the secure transport layer and the mandatory-to-implement secure transport is SSH [RFC6242]. The NETCONF access control model [RFC6536] provides the means to restrict access for particular NETCONF users to a pre- configured subset of all available NETCONF protocol operation and content. 11. IANA Considerations This document registers a URI in the IETF XML registry [RFC3688]. Following the format in [RFC3688], the following registration is requested to be made: URI: urn:ietf:params:xml:ns:yang:ietf-interfaces:ietf-ext-xponder- wdm-if Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. This document registers a YANG module in the YANG Module Names registry [RFC6020]. This document registers a YANG module in the YANG Module Names registry [RFC6020]. prefix: ietf-ext-xponder-wdm-if reference: RFC XXXX 12. Acknowledgements Marco Cardani. 13. Contributors G.Galimberti, et al. Expires July 4, 2018 [Page 17] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 Dean Bogdanovic Juniper Networks Westford U.S.A. email deanb@juniper.net Walid Wakim Cisco 9501 Technology Blvd ROSEMONT, ILLINOIS 60018 UNITED STATES email wwakim@cisco.com Marco Cardani Cisco vis S.Maria Molgora, 48c 20871 - Vimercate Monza Brianza Italy email mcardani@cisco.com Giovanni Martinelli Cisco vis S.Maria Molgora, 48c 20871 - Vimercate Monza Brianza Italy email giomarti@cisco.com 14. References 14.1. Normative References [ITU.G694.1] International Telecommunications Union, "Spectral grids for WDM applications: DWDM frequency grid", ITU-T Recommendation G.694.1, June 2002. [ITU.G698.2] International Telecommunications Union, "Amplified multichannel dense wavelength division multiplexing applications with single channel optical interfaces", ITU-T Recommendation G.698.2, November 2009. G.Galimberti, et al. Expires July 4, 2018 [Page 18] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 [ITU.G709] International Telecommunications Union, "Interface for the Optical Transport Network (OTN)", ITU-T Recommendation G.709, March 2003. [ITU.G7710] International Telecommunications Union, "Common equipment management function requirements", ITU-T Recommendation G.7710, May 2008. [ITU.G798] International Telecommunications Union, "Characteristics of optical transport network hierarchy equipment functional blocks", ITU-T Recommendation G.798, October 2010. [ITU.G8201] International Telecommunications Union, "Error performance parameters and objectives for multi-operator international paths within the Optical Transport Network (OTN)", ITU-T Recommendation G.8201, April 2011. [ITU.G826] International Telecommunications Union, "End-to-end error performance parameters and objectives for international, constant bit-rate digital paths and connections", ITU-T Recommendation G.826, November 2009. [ITU.G872] International Telecommunications Union, "Architecture of optical transport networks", ITU-T Recommendation G.872, November 2001. [ITU.G874] International Telecommunications Union, "Management aspects of optical transport network elements", ITU-T Recommendation G.874, July 2010. [ITU.G874.1] International Telecommunications Union, "Optical transport network (OTN): Protocol-neutral management information model for the network element view", ITU-T Recommendation G.874.1, January 2002. [ITU.G959.1] International Telecommunications Union, "Optical transport network physical layer interfaces", ITU-T Recommendation G.959.1, November 2009. G.Galimberti, et al. Expires July 4, 2018 [Page 19] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, DOI 10.17487/RFC2578, April 1999, . [RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Textual Conventions for SMIv2", STD 58, RFC 2579, DOI 10.17487/RFC2579, April 1999, . [RFC2580] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Conformance Statements for SMIv2", STD 58, RFC 2580, DOI 10.17487/RFC2580, April 1999, . [RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, DOI 10.17487/RFC2863, June 2000, . [RFC3591] Lam, H-K., Stewart, M., and A. Huynh, "Definitions of Managed Objects for the Optical Interface Type", RFC 3591, DOI 10.17487/RFC3591, September 2003, . [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, . 14.2. Informative References [I-D.ietf-ccamp-dwdm-if-mng-ctrl-fwk] Kunze, R., Grammel, G., Beller, D., and G. Galimberti, "A framework for Management and Control of DWDM optical interface parameters", draft-ietf-ccamp-dwdm-if-mng-ctrl- fwk-00 (work in progress), April 2016. [RFC2629] Rose, M., "Writing I-Ds and RFCs using XML", RFC 2629, DOI 10.17487/RFC2629, June 1999, . G.Galimberti, et al. Expires July 4, 2018 [Page 20] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 [RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, DOI 10.17487/RFC3410, December 2002, . [RFC4054] Strand, J., Ed. and A. Chiu, Ed., "Impairments and Other Constraints on Optical Layer Routing", RFC 4054, DOI 10.17487/RFC4054, May 2005, . [RFC4181] Heard, C., Ed., "Guidelines for Authors and Reviewers of MIB Documents", BCP 111, RFC 4181, DOI 10.17487/RFC4181, September 2005, . Appendix A. Change Log This optional section should be removed before the internet draft is submitted to the IESG for publication as an RFC. Note to RFC Editor: please remove this appendix before publication as an RFC. Appendix B. Open Issues Note to RFC Editor: please remove this appendix before publication as an RFC. Authors' Addresses Gabriele Galimberti (editor) Cisco Via Santa Maria Molgora, 48 c 20871 - Vimercate Italy Phone: +390392091462 Email: ggalimbe@cisco.com Ruediger Kunze Deutsche Telekom Dddd, xx Berlin Germany Phone: +49xxxxxxxxxx Email: RKunze@telekom.de G.Galimberti, et al. Expires July 4, 2018 [Page 21] Internet-Draft draft-galimbe-ccamp-iv-yang-04 December 2017 Dharini Hiremagalur (editor) Juniper 1194 N Mathilda Avenue Sunnyvale - 94089 California USA Email: dharinih@juniper.net Gert Grammel (editor) Juniper Oskar-Schlemmer Str. 15 80807 Muenchen Germany Phone: +49 1725186386 Email: ggrammel@juniper.net G.Galimberti, et al. Expires July 4, 2018 [Page 22]