CCAMP G. Martinelli, Ed. Internet-Draft Cisco Intended status: Standards Track A. Zanardi, Ed. Expires: January 14, 2014 CREATE-NET X. Zhang, Ed. Huawei Technologies G. Galimberti Cisco D. Siracusa CREATE-NET July 13, 2013 Information Encoding for WSON with Impairments Validation draft-martinelli-ccamp-wson-iv-encode-02 Abstract Impairment-Aware (IA) Routing and Wavelength Assignment (RWA) function might be required in Wavelength Switched Optical Networks (WSON) that already support RWA. This document defines proper encoding to support this operation. It goes in addition to the available impairment-free WSON encoding and it is fully compatible with it. As the information model, the encoding is independent from control plane architectures and protocol implementations. Its definitions can be used in related protocol extensions. 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 http://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 January 14, 2014. Copyright Notice Martinelli, et al. Expires January 14, 2014 [Page 1] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents 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. Requirements Language . . . . . . . . . . . . . . . . . . 2 2. Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1. Optical Parameter . . . . . . . . . . . . . . . . . . . . 3 2.2. Impairment Vector . . . . . . . . . . . . . . . . . . . . 4 2.3. Impairment Matrix . . . . . . . . . . . . . . . . . . . . 5 3. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6 4. Contributing Authors . . . . . . . . . . . . . . . . . . . . 6 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 6. Security Considerations . . . . . . . . . . . . . . . . . . . 7 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.1. Normative References . . . . . . . . . . . . . . . . . . 7 7.2. Informative References . . . . . . . . . . . . . . . . . 7 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8 1. Introduction In case of WSON where optical impairments play a significant role, the framework document [RFC6566] defines related control plane architectural options for Impairment Aware Routing and Wavelength Assignment (IA-RWA). This document provides a suitable encoding for the related WSON impairment information model as defined [I-D.martinelli-ccamp-wson-iv-info]. This document directly refers to ITU recommendations [ITU.G680] and [ITU.G697] as already detailed in the information model. 1.1. Requirements Language 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]. Martinelli, et al. Expires January 14, 2014 [Page 2] Internet-Draft Encoding WSON Info Model with Impairments July 2013 2. Encoding 2.1. Optical Parameter The OPTICAL_PARAM is defined as a sub TLV object. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S| Reserved | ParamSource | ParamID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Variance | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The following flag is defined: S. Standard bit. S=1 indentifies a set of parameters standardized by ITU; while S=0 identifies a non-standardized set of parameters. With the flag S=1 the following parameters are defined: ParamSource. Where this parameter is defined. Currently only [ITU.G697] has defined this with value 1. ParamID. Parameter identifier according to the source. [ITU.G697] table V.3 defines the following identifiers: 1. Total Power (dBm) 2. Channel Power (dBm) 3. Reserved (Defined in [ITU.G697] but not used) 4. Reserved (Defined in [ITU.G697] but not used) 5. OSNR (db) 6. Q Factor (a pure number) 7. PMD (ps) 8. Residual Chromatic Dispersion (ps/nm) Value. Value for the parameter. As defined by [ITU.G697], it is a 32 bit IEEE floating point number. Martinelli, et al. Expires January 14, 2014 [Page 3] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Variance. Variance for the parameter, a 32 bit IEEE floating point number. 2.2. Impairment Vector This sub-TLV is a list of optical parameters and they MAY have a wavelength dependency information. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |0| Reserved | Number of Parameters | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Optical Param sub-TLV(s) | : | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Where: W = 0. Wavelength Dependency flag. There is no wavelength dependency. Number of Parameters contained in this vector. Optical Param sub-TLV(s) present a list of Object as defined in Section 2.1. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1| Reserved | Number of Parameters | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Label Set | : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Optical Param sub-TLV(s) | : | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Where: W = 1. Wavelength Dependency flag. There is wavelength dependency. The Label Set object is defined in [I-D.ietf-ccamp-general-constraint-encode] Section 2.1. Likely an Martinelli, et al. Expires January 14, 2014 [Page 4] Internet-Draft Encoding WSON Info Model with Impairments July 2013 inclusive range will be the only option required by the Action defined in the Label Set. 2.3. Impairment Matrix As defined by the [I-D.martinelli-ccamp-wson-iv-info], the impairment matrix follows the same structure as the connectivity matrix. [Xian's note]: (1) Similar problem as mentioned above applies, the structure differs when N is set to different values; so they should be described separately; (2) I would prefer the "W" stay with the previous structure. (3) Since the format of impairment matrix does not follow exactly as the connectivity matrix. i would suggest revising the sentence above to reflect this. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Connectivity | MatrixID | Reserved |0| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Link Set A #1 | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Link Set B #1 | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Impairment Vector sub-TLV(s) | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Additional Link Set pairs and Impairment Vector(s) | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Connectivity | MatrixID | Reserved |1| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Impairment Vector sub-TLV(s) | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Where: Martinelli, et al. Expires January 14, 2014 [Page 5] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Connectivity: value MUST be 2 for the impairment matrix (Values 0 and 1 are already defined by [I-D.ietf-ccamp-general-constraint-encode]. MatrixID: matrix identifier, the scope of this integer number is shared with [I-D.ietf-ccamp-rwa-info]. N: Node scope flag. With this flag set there's no Link Set information but only a list of optical parameters TLVs that apply to the whole optical node. The usage of multiple matrixes with connectivity type equal to 2 (Impairment Matrix) MIGHT be used to grup optical parameters by connectivity. For example, if a subset of parameters apply to the whole node, a unique matrix with flag N=1 is used. At the same some another subset of parameters applies only to some LinkSet pairs, a specific Impairment Matrix will be added. 3. Acknowledgements TBD 4. Contributing Authors This document was the collective work of several authors. The text and content of this document was contributed by the editors and the co-authors listed below (the contact information for the editors appears in appropriate section and is not repeated below): Moustafa Kattan Cisco DUBAI, 500321 UNITED ARAB EMIRATES Email: mkattan@cisco.com Young Lee Huawei 1700 Alma Drive, Suite 100 Plano, TX 75075 USA Phone: +1 972 509 5599 x2240 Fax: +1 469 229 5397 Email: ylee@huawei.com Martinelli, et al. Expires January 14, 2014 [Page 6] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Fatai Zhang Huawei F3-5-B R&D Center, Huawei Base Bantian, Longgang District P.R. China Phone: +86-755-28972912 Email: zhangfatai@huawei.com 5. IANA Considerations This document does not contain any IANA request. 6. Security Considerations This document defines an protocol-neutral encoding for an information model describing impairments in optical networks and it does not introduce any security issues. If such a encoding is put into use within a network it will by its nature contain details of the physical characteristics of an optical network. Such information would need to be protected from intentional or unintentional disclosure. 7. References 7.1. Normative References [ITU.G680] International Telecommunications Union, "Physical transfer functions of optical network elements ", ITU-T Recommendation G.680, July 2007. [ITU.G697] International Telecommunications Union, "Optical monitoring for dense wavelength division multiplexing systems ", ITU-T Recommendation G.697, February 2012. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. 7.2. Informative References [I-D.ietf-ccamp-general-constraint-encode] Martinelli, et al. Expires January 14, 2014 [Page 7] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Bernstein, G., Lee, Y., Li, D., and W. Imajuku, "General Network Element Constraint Encoding for GMPLS Controlled Networks", draft-ietf-ccamp-general-constraint-encode-11 (work in progress), May 2013. [I-D.ietf-ccamp-rwa-info] Lee, Y., Bernstein, G., Li, D., and W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", draft-ietf-ccamp-rwa-info-18 (work in progress), May 2013. [I-D.martinelli-ccamp-wson-iv-info] Martinelli, G., Kattan, M., Galimberti, G., and A. Zanardi, "Information Model for Wavelength Switched Optical Networks (WSON) with Optical Impairments Validation.", draft-martinelli-ccamp-wson-iv-info-01 (work in progress), February 2013. [I-D.narten-iana-considerations-rfc2434bis] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", draft-narten-iana- considerations-rfc2434bis-09 (work in progress), March 2008. [RFC3552] Rescorla, E. and B. Korver, "Guidelines for Writing RFC Text on Security Considerations", BCP 72, RFC 3552, July 2003. [RFC6566] Lee, Y., Bernstein, G., Li, D., and G. Martinelli, "A Framework for the Control of Wavelength Switched Optical Networks (WSONs) with Impairments", RFC 6566, March 2012. Authors' Addresses Giovanni Martinelli (editor) Cisco via Philips 12 Monza 20900 Italy Phone: +39 039 2092044 Email: giomarti@cisco.com Martinelli, et al. Expires January 14, 2014 [Page 8] Internet-Draft Encoding WSON Info Model with Impairments July 2013 Andrea Zanardi (editor) CREATE-NET via alla Cascata 56 C, Povo Trento 38100 Italy Email: andrea.zanardi@create-net.org Xian Zhang (editor) Huawei Technologies F3-5-B R&D Center, Huawei Base Bantian, Longgang District Shenzen 518129 P.R. China Phone: +86 755 28972913 Email: zhang.xian@huawei.com Gabriele M. Galimberti Cisco Via Philips,12 Monza 20900 Italy Phone: +39 039 2091462 Email: ggalimbe@cisco.com Domenico Siracusa CREATE-NET via alla Cascata 56 C, Povo Trento 38100 Italy Email: domenico.siracusa@create-net.org Martinelli, et al. Expires January 14, 2014 [Page 9]