Network Working Group E. Roch Internet Draft Ciena Intended status: Informational T. Marcot Expires: April 2011 France Telecom L. Ong Ciena October 18, 2010 Extensions to Hierarchical LSPs for Multi-Client Support draft-roch-ccamp-lsp-hier-multi-client-00.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." 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Roch, Marcot & Ong Expires April 18, 2011 [Page 1] Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010 Abstract A set of requirements and a proposed solution for the control of hierarchical Label Switched Paths (LSPs) is found in [HIER]. However, support of multiple client layer networks are not covered by [HIER]. This internet draft describes additional requirements and proposes a solution to support multiple client layer networks. Table of Contents 1. Introduction and Problem Statement.............................2 2. Requirements...................................................2 3. Mechanisms and Protocol Extensions.............................2 4. Security Considerations........................................3 5. IANA Considerations............................................3 6. References.....................................................3 6.1. Normative References......................................3 6.2. Informative References.........Error! Bookmark not defined. 7. Acknowledgments................................................4 1. Introduction and Problem Statement [HIER] defines a set of extensions for the control of hierarchical Label Switched Paths (LSPs).It allows an LSP created in one network, i.e. server network, to be used in another network, i.e. client network. The LSP_TUNNEL_INTERFACE_ID is used during server network LSP establishment to exchange information about how to identify and optionally advertise the link in the client network. 2. Requirements In order to support flexible adaptation where a server network LSP provides services to multiple client networks, it is necessary to identify to which layer the information carried in the LSP_TUNNEL_INTERFACE_ID applies to. For example, an OTN LSP is established and is available to carry Ethernet or SDH client traffic. New Requirement: For each client network supported, it should be possible to exchange both the layer identification and a separate set of control plane identifiers associated with the client layer. 3. Mechanisms and Protocol Extensions The extension continues to use the current format for LSP_TUNNEL_INTERFACE_ID object as defined in [HIER], and just adds a Roch, Marcot & Ong Expires April 18, 2011 [Page 2] Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010 new sub-TLV that identifies the specific client layer(s) that should use the information exchanged in the LSP_TUNNEL_INTERFACE_ID. This allows a single LSP_TUNNEL_INTERFACE_ID to carry information for multiple client layers if they share common control information. Several LSP_TUNNEL_INTERFACE_ID objects are required when there are client layers with different control plane identifier information. A new CLIENT_LAYER_ID_SUB_TLV Object is defined to indicate to which client layer(s) the LSP_TUNNEL_INTERFACE_ID is applicable. The TLV is formatted as described in Section 3.1.2 of [HIER]. The Type field has the value 3 (TBD), and the Value field has the following content: 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Encoding Type | Switching Type| Signal Type | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Encoding Type | Switching Type| Signal Type | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 4. Security Considerations TBD 5. IANA Considerations TBD 6. References 6.1. Normative References [HIER] Shiomoto, K., and Farrel, A. (Editors), ''Procedures for Dynamically Signaled Hierarchical Label Switched Paths'', draft-ietf-ccamp-lsp-hierarchy-bis-08.txt, February 2010 [RFC4258] Brungard, D, Ed. ''Requirements for Generalized Multi- Protocol Label Switching (GMPLS) Routing for the Automatically Switched Optical Network (ASON)'', RFC4258, November 2005 [RFC4652] Papadimitriou, D., Ed. ''Evaluation of Existing Routing Protocols against Automatic Switched Optical Network (ASON) Routing Requirements'', RFC4652, October 2006 Roch, Marcot & Ong Expires April 18, 2011 [Page 3] Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010 7. Acknowledgments The authors would like to thank Vishnu Shukla (Verizon) and Fatai Zhang (Huawei) for their contribution and comments to this document. Roch, Marcot & Ong Expires April 18, 2011 [Page 4] Internet-Draft draft-roch-ccamp-lsp-hier-multi-client October 2010 Authors' Addresses Evelyne Roch Ciena Email: eroch@ciena.com Thierry Marcot France Telecom Email: thierry.marcot@orange-ftgroup.com Lyndon Ong Ciena Email: lyong@ciena.com Roch, Marcot & Ong Expires April 18, 2011 [Page 5]