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Enhancing OSPF and IS-IS for Optical Routing with Lambda Traffic Engineering

This document outlines extensions to OSPF and IS-IS protocols specifically designed to improve optical routing by integrating Lambda traffic engineering. It includes a detailed examination of mandatory link types, characteristics such as link ID and resource availability, and the encoding types essential for optimal bandwidth management. The work emphasizes service-transparent and service-aware link types and discusses the convergence of IP and optical layers through enhanced MPLS control. This proposal aims to facilitate efficient resource utilization in optical networks.

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Enhancing OSPF and IS-IS for Optical Routing with Lambda Traffic Engineering

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  1. draft-wang-ospf-isis-lambda-te-routing-00.txt Guoqiang Wang, Don Fedyk (Nortel Networks) Vishal Sharma, Ken Owens (Tellabs) Gerald R. Ash (AT&T) Murali Krishnaswamy, Yang Cao (Lucent Technologies) M.K. Girish (SBC Technology Resources, Inc.) Herbert M. Ruck (Packet Network Services) Simon Bernstein, Phuc Nquyen (Global One) Sunil Ahluwalia (Trillium Digital Systems) Lihshin Wang(Qwest Communications) Avri Doria (Nokia Telecommunications) Heinrich Hummel (Siemens AG)

  2. Extensions to OSPF/IS-IS for Optical Routing 1. Link type (mandatory) 2. Link ID (mandatory) 3. Local interface IP address (mandatory) 4. Remote interface IP address (mandatory) 5. Traffic engineering metric (mandatory) 6. Available Link resource (mandatory) 7. Resource class/Color (mandatory)

  3. Link Type There are two types of links: • service-transparent (ST) link is a link providing transparent bit transmission, • service-aware (SA) link is a link in which interfaces on both ends will handle the payload according to protocol format and/or data bit rate before transmitting and afterreceiving

  4. Type = 6 Length Encoding Type Number of Lambda Bandwidth Number of Lambda Encoding Type Bandwidth 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 Available Link resource TLV Encoding Type Description 1 reserved 2 Transparent 3 GE 4 10 GE 5 OC-3/STM-1 6 OC-3c 7 OC-12/STM-4 8 OC-12c 9 OC-48/STM-16 10 OC-48c 11 OC-192/STM-64 12 OC-192c 13 OC-768/STM-256 14 OC-768c “Pools of Lambda”

  5. 100 % 100 % 0 % 0 % 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 Pools of Bandwidth - Fit with Existing Model Link Bandwidth is prioritized Lambda Pools Optical Trail LSP Link (Might be Fiber) LSPs @ Priority LSPs Optical Trail LSP LSP Service Transparent (Opaque) Link IP Link Layer Over subscription occurs here Set of all Lambda Pools (Might be Fiber Bundle)

  6. IS-IS TE-Extensions OSPF TE-Extensions Constraint-Based Routing Functions TE Policy Manager CR-LDP RSVP-TE Path Selection Bandwidth Manager TE Database

  7. Convergence of IP and Optics through MPLS IP Layer Control & Management MPLS Optical Layer Flexible Transport Service

  8. IETF Activity IP over Optical Networks - A Framework draft-ip-optical-framework-00.txt MPLS control plane for Switched Optical Networks draft-krishnaswamy-mpls-son-00.txt Extensions to CR-LDP and RSVP-TE for Optical Path Set-up draft-fan-mpls-lambda-signaling-00.txt Extensions to OSPF/IS-IS for Optical Routing draft-wang-ospf-isis-lambda-te-routing-00.txt

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