Network Working Group Y. Lee Internet Draft Huawei Intended status: Standards Track G. Bernstein Expires: March 2011 Grotto Networking September 2, 2010 OSPF Enhancement for Signal and Network Element Compatibility for Wavelength Switched Optical Networks draft-ietf-ccamp-wson-signal-compatibility-ospf-02.txt 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 September 2, 2010. Copyright Notice Copyright (c) 2010 IETF Trust and the persons identified as the document authors. All rights reserved. Lee and Bernstein Expires March 2, 2011 [Page 1] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 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. Abstract This document provides GMPLS OSPF routing enhancements to support signal compatibility constraints associated with WSON network elements. These routing enhancements are required in common optical or hybrid electro-optical networks where not all of the optical signals in the network are compatible with all network elements participating in the network. This compatibility constraint model is applicable to common optical or hybrid electro optical systems such as OEO switches, regenerators, and wavelength converters since such systems can be limited to processing only certain types of WSON signals. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC-2119 [RFC2119]. Table of Contents 1. Introduction...................................................3 1.1. Revision History..........................................3 2. Compatibility and Accessibility Sub-TLVs.......................3 2.1. Resource Block Information sub-TLV........................4 3. Security Considerations........................................5 4. IANA Considerations............................................5 4.1. Node Information..........................................5 5. References.....................................................6 5.1. Normative References......................................6 6. Contributors...................................................7 Authors' Addresses................................................7 Intellectual Property Statement...................................8 Lee and Bernstein Expires March 2, 2011 [Page 2] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 Disclaimer of Validity............................................8 1. Introduction The documents [WSON-Frame, WSON-Info, RWA-Encode] explain how to extend the wavelength switched optical network (WSON) control plane to allow both multiple WSON signal types and common hybrid electro optical systems as well hybrid systems containing optical switching and electro-optical resources. In WSON, not all of the optical signals in the network are compatible with all network elements participating in the network. Therefore, signal compatibility is an important constraint in path computation in a WSON. This document provides GMPLS OSPF routing enhancements to support signal compatibility constraints associated with general WSON network elements. These routing enhancements are required in common optical or hybrid electro-optical networks where not all of the optical signals in the network are compatible with all network elements participating in the network. This compatibility constraint model is applicable to common optical or hybrid electro optical systems such as OEO switches, regenerators, and wavelength converters since such systems can be limited to processing only certain types of WSON signals. 1.1. Revision History From 00 to 01: The details of the encodings for compatibility moved from this document to [RWA_Encode]. From 01 to 02: Editorial changes. 2. Compatibility and Accessibility Sub-TLVs The encodings described in [RWA-Encode] involve node level properties, rather than link level, and hence belong in an appropriate node oriented top level TLV. The OSPF TE LSA node attribute TLV of [OSPF-Node] is used for this purpose. This document defines four OSPF TE LSA node attribute sub-TLVs based on the encodings in [RWA-Encode]: Sub-TLV Type Length Name Lee and Bernstein Expires March 2, 2011 [Page 3] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 TBA variable Resource Block Information TBA variable Resource Block Accessibility TBA variable Resource Block Wavelength Constraints TBA variable Resource Block Pool State The detail encodings of these sub-TLVs are found in [RWA-Encode] as indicated in the table below. Name Section[RWA-Encode] Resource Block Information 5.1 Resource Block Accessibility 4.1 Resource Block Wavelength Constraints 4.2 Resource Block Pool State 4.3 Among the sub-TLVs defined above, the Resource Block Pool State sub- TLV is dynamic in nature while the rest are static. As such, it will be separated out from the rest and make use of multiple TE LSA instances per source, per RFC3630 multiple instance capability. 2.1. Resource Block Information sub-TLV There are seven nested sub-TLVs defined in the Resource Block Information sub-TLV. Sub-TLV Type Length Name TBA variable Input Modulation Format List TBA variable Input FEC Type List TBA variable Input Bit Range List TBA variable Input Client Signal List TBA variable Processing Capability List TBA variable Output Modulation Format List TBA variable Output FEC Type List The detail encodings of these sub-TLVs are found in [RWA-Encode] as indicated in the table below. Name Section[RWA-Encode] Input Modulation Format List 5.2 Input FEC Type List 5.3 Input Bit Range List 5.4 Input Client Signal List 5.5 Lee and Bernstein Expires March 2, 2011 [Page 4] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 Processing Capability List 5.6 Output Modulation Format List 5.7 Output FEC Type List 5.8 3. Security Considerations This document does not introduce any further security issues other than those discussed in [RFC 3630], [RFC 4203]. 4. IANA Considerations According to [RFC3630], the OSPF TE LSA and Types for sub-TLVs for each top level Types must be assigned by Expert Review, and must be registered with IANA. IANA is requested to allocate new Types for the sub-TLVs as defined in Sections 2 and 2.1 as follows: 4.1. Node Information This document introduces the following sub-TLVs of Node Attribute TLV (Value TBD, see [OSPF-Node]) Sub-TLV Type Length Name TBA variable Resource Block Information TBA variable Resource Block Accessibility TBA variable Resource Block Wavelength Constraints TBA variable Resource Block Pool State Sub-TLV Type Length Name TBA variable Input Modulation Format List TBA variable Input FEC Type List TBA variable Input Bit Range List TBA variable Input Client Signal List TBA variable Processing Capability List TBA variable Output Modulation Format List TBA variable Output FEC Type List Lee and Bernstein Expires March 2, 2011 [Page 5] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 Lee and Bernstein Expires March 2, 2011 [Page 6] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 5. References 5.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3471] Berger, L., "Generalized Multi-Protocol Label Switching (GMPLS) Signaling Functional Description", RFC 3471, January 2003. [RFC3630] Katz, D., Kompella, K., and Yeung, D., "Traffic Engineering (TE) Extensions to OSPF Version 2", RFC 3630, September 2003. [G.694.1] ITU-T Recommendation G.694.1, "Spectral grids for WDM applications: DWDM frequency grid", June, 2002. [RFC4202] Kompella, K., Ed., and Y. Rekhter, Ed., "Routing Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)", RFC 4202, October 2005 [RFC4203] Kompella, K., Ed., and Y. Rekhter, Ed., "OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)", RFC 4203, October 2005. [RFC4328] Papadimitriou, D., Ed., "Generalized Multi-Protocol Label Switching (GMPLS) Signaling Extensions for G.709 Optical Transport Networks Control", RFC 4328, January 2006. [RFC5307] Kompella, K., Ed., and Y. Rekhter, Ed., "IS-IS Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)", RFC 5307, October 2008. [OSPF-Node] R. Aggarwal and K. Kompella, "Advertising a Router's Local Addresses in OSPF TE Extensions", draft-ietf-ospf- te-node-addr, work in progress. [Lambda-Labels] T. Otani, H. Guo, K. Miyazaki, D. Caviglia, "Generalized Labels for G.694 Lambda-Switching Capable Label Switching Routers", draft-ietf-ccamp- gmpls-g-694-lambda-labels, work in progress. Lee and Bernstein Expires March 2, 2011 [Page 7] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 [WSON-Frame] Y. Lee, G. Bernstein, W. Imajuku, "Framework for GMPLS and PCE Control of Wavelength Switched Optical Networks", draft-ietf-ccamp-rwa-WSON-Framework, work in progress. [WSON-Info] Y. Lee, G. Bernstein, D. Li, W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", draft-ietf-ccamp-rwa-info work in progress. [RWA-Encode]G. Bernstein, Y. Lee, D. Li, W. Imajuku, "Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks", draft-ietf- ccamp-rwa-wson-encode, work in progress. 6. Contributors Authors' Addresses Young Lee (ed.) Huawei Technologies 1700 Alma Drive, Suite 100 Plano, TX 75075 USA Phone: (972) 509-5599 (x2240) Email: ylee@huawei.com Lee and Bernstein Expires March 2, 2011 [Page 8] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 Greg M. Bernstein (ed.) Grotto Networking Fremont California, USA Phone: (510) 573-2237 Email: gregb@grotto-networking.com Intellectual Property Statement The IETF Trust takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in any IETF Document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Copies of Intellectual Property disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement any standard or specification contained in an IETF Document. Please address the information to the IETF at ietf-ipr@ietf.org. Disclaimer of Validity All IETF Documents and the information contained therein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Lee and Bernstein Expires March 2, 2011 [Page 9] Internet-Draft OSPF Enhancement for WSON Signal Compatibility September 2010 Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Lee and Bernstein Expires March 2, 2011 [Page 10]