The Experts below are selected from a list of 47520 Experts worldwide ranked by ideXlab platform
D Awduche - One of the best experts on this subject based on the ideXlab platform.
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internet Traffic Engineering using multi protocol label switching mpls
Computer Networks, 2002Co-Authors: D Awduche, Bijan JabbariAbstract:With the rising popularity of the Internet there have arisen corresponding requirements for network reliability, efficiency, and service quality. Internet service providers are responding to these developments by critically examining every aspect of their operational environment, looking for opportunities to scale their networks and optimize performance. In this context, Traffic Engineering has emerged as a major consideration in the design and operation of large public Internet backbone networks. However, the classical Internet interior gateway routing protocols hinder the practical realization of sophisticated Traffic Engineering policies in legacy IP networks. The advent of multiprotocol label switching (MPLS) offers the prospect to address some of the shortcomings associated with Traffic Engineering in IP networks. This paper discusses the techniques and practices of Traffic Engineering in contemporary IP networks, emphasizing the role of MPLS in performance optimization of the public Internet. We also examine the impact of generalized MPLS (GMPLS) on Traffic Engineering in IP-over-optical networks as the underlying technologies continue to mature.
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Applicability Statement for Traffic Engineering with MPLS
2002Co-Authors: J. Boyle, Alan Hannan, D Awduche, V. Gill, D. Cooper, B. Christian, Wai Sum LaiAbstract:This document describes the applicability of Multiprotocol Label Switching (MPLS) to Traffic Engineering in IP networks. Special considerations for deployment of MPLS for Traffic Engineering in operational contexts are discussed and the limitations of the MPLS approach to Traffic Engineering are highlighted.
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overview and principles of internet Traffic Engineering
RFC, 2002Co-Authors: D Awduche, A Chiu, Anwar Elwalid, Indra Widjaja, Xipeng XiaoAbstract:This memo describes the principles of Traffic Engineering (TE) in the Internet. The document is intended to promote better understanding of the issues surrounding Traffic Engineering in IP networks, and to provide a common basis for the development of Traffic Engineering capabilities for the Internet. The principles, architectures, and methodologies for performance evaluation and performance optimization of operational IP networks are discussed throughout this document.
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mpls and Traffic Engineering in ip networks
IEEE Communications Magazine, 1999Co-Authors: D AwducheAbstract:Rapid growth and increasing requirements for service quality, reliability, and efficiency have made Traffic Engineering an essential consideration in the design and operation of large public Internet backbone networks. Internet Traffic Engineering addresses the issue of performance optimization of operational networks. A paramount objective of Internet Traffic Engineering is to facilitate the transport of IP Traffic through a given network in the most efficient, reliable, and expeditious manner possible. Historically, Traffic Engineering in the Internet has been hampered by the limited functional capabilities of conventional IP technologies. Recent developments in multiprotocol label switching (MPLS) and differentiated services have opened up new possibilities to address some of the limitations of the conventional technologies. This article discusses the applications of MPLS to Traffic Engineering in IP networks.
Lionel M Ni - One of the best experts on this subject based on the ideXlab platform.
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Traffic Engineering with MPLS in the Internet
IEEE Network, 2000Co-Authors: Xipeng Xiao, Alan Hannan, Brooke Bailey, Lionel M NiAbstract:This article discusses Traffic Engineering with multiprotocol\nlabel switching (MPLS) in an Internet service provider's network. We\nfirst review MPLS, constraint-based routing, and enhanced link state\ninterior gateway protocols to provide a background for Traffic\nEngineering. We then discuss the general issues of designing an MPLS\nsystem for Traffic Engineering. The design of GlobalCenter's MPLS system\nis presented. Based on our experiences, a generic procedure for\ndeploying an MPLS system is proposed. We also discuss how to provide QoS\nin a network with MPLS. Putting these together, we present to readers\nthe practical issues of Traffic Engineering and a working solution for\nTraffic Engineering with MPLS in the Internet
Steve Uhlig - One of the best experts on this subject based on the ideXlab platform.
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Implications of Traffic characteristics on interdomain Traffic Engineering
2004Co-Authors: Steve UhligAbstract:This thesis discusses the implications of the Traffic characteristics on interdomain Traffic Engineering with BGP. We first provide an overview of the interdomain Traffic control problem. Then, we present results concerning the characteristics of the interdomain Traffic, based on the analysis of real Traffic traces gathered from non-transit ASes. We discuss the implications of the topological properties of the Traffic on interdomain Traffic Engineering. Based on this knowledge of the Traffic characteristics, we go on to study the complexity of designing interdomain Traffic Engineering techniques by defining the problem as an optimization problem. We show that designing Traffic Engineering techniques is possible but that several issues inherent to the current interdomain architecture make the task complex. Finally, we evaluate the current state-of-the-art of interdomain Traffic Engineering and discuss how we envision its future.
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interdomain Traffic Engineering with bgp
IEEE Communications Magazine, 2003Co-Authors: Bruno Quoitin, Cristel Pelsser, L Swinnen, Olivier Bonaventure, Steve UhligAbstract:Traffic Engineering is performed by means of a set of techniques that can be used to better control the flow of packets inside an IP network. We discuss the utilization of these techniques across interdomain boundaries in the global Internet. We first analyze the characteristics of interdomain Traffic on the basis of measurements from three different Internet service providers and show that a small number of sources are responsible for a large fraction of the Traffic. Across interdomain boundaries, Traffic Engineering relies on a careful tuning of the route advertisements sent via the border gateway protocol. We explain how this tuning can be used to control the flow of incoming and outgoing Traffic, and identify its limitations.
Xipeng Xiao - One of the best experts on this subject based on the ideXlab platform.
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overview and principles of internet Traffic Engineering
RFC, 2002Co-Authors: D Awduche, A Chiu, Anwar Elwalid, Indra Widjaja, Xipeng XiaoAbstract:This memo describes the principles of Traffic Engineering (TE) in the Internet. The document is intended to promote better understanding of the issues surrounding Traffic Engineering in IP networks, and to provide a common basis for the development of Traffic Engineering capabilities for the Internet. The principles, architectures, and methodologies for performance evaluation and performance optimization of operational IP networks are discussed throughout this document.
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Traffic Engineering with MPLS in the Internet
IEEE Network, 2000Co-Authors: Xipeng Xiao, Alan Hannan, Brooke Bailey, Lionel M NiAbstract:This article discusses Traffic Engineering with multiprotocol\nlabel switching (MPLS) in an Internet service provider's network. We\nfirst review MPLS, constraint-based routing, and enhanced link state\ninterior gateway protocols to provide a background for Traffic\nEngineering. We then discuss the general issues of designing an MPLS\nsystem for Traffic Engineering. The design of GlobalCenter's MPLS system\nis presented. Based on our experiences, a generic procedure for\ndeploying an MPLS system is proposed. We also discuss how to provide QoS\nin a network with MPLS. Putting these together, we present to readers\nthe practical issues of Traffic Engineering and a working solution for\nTraffic Engineering with MPLS in the Internet
Yin Zhang - One of the best experts on this subject based on the ideXlab platform.
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GATEway: symbiotic inter-domain Traffic Engineering
Telecommunication Systems, 2011Co-Authors: Matthew Roughan, Yin ZhangAbstract:There are a group of problems in networking that can most naturally be described as optimization problems (network design, Traffic Engineering, etc.). There has been a great deal of research devoted to solving these problems, but this research has been concentrated on intra-domain problems where one network operator has complete information and control. An emerging field is inter-domain Engineering, for instance, Traffic Engineering between large autonomous networks. Extending intra-domain optimization techniques to inter-domain problems is often impossible without the information available within a domain, and providers are often unwilling to share such information. This paper presents an alternative: we propose a method for Traffic Engineering that does not require sharing of important information across domains. The method extends the idea of genetic algorithms to allow symbiotic evolution between two parties. Both parties may improve their performance without revealing their data, other than what would be easily observed in any case. We show the method provides large reductions in network congestion, close to the optimal shortest path routing across a pair of networks. The results are highly robust to measurement noise, the method is very flexible, and it can be applied using existing routing.
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SIGCOMM - COPE: Traffic Engineering in dynamic networks
ACM SIGCOMM Computer Communication Review, 2006Co-Authors: Hao Wang, Yin Zhang, Yang Richard Yang, Haiyong Xie, Lili Qiu, Albert GreenbergAbstract:Traffic Engineering plays a critical role in determining the performance and reliability of a network. A major challenge in Traffic Engineering is how to cope with dynamic and unpredictable changes in Traffic demand. In this paper, we propose COPE, a class of Traffic Engineering algorithms that optimize for the expected scenarios while providing a worst-case guarantee for unexpected scenarios. Using extensive evaluations based on real topologies and Traffic traces, we show that COPE can achieve efficient resource utilization and avoid network congestion in a wide variety of scenarios.
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cope Traffic Engineering in dynamic networks
ACM Special Interest Group on Data Communication, 2006Co-Authors: Hao Wang, Yin Zhang, Yang Richard Yang, Albert GreenbergAbstract:Traffic Engineering plays a critical role in determining the performance and reliability of a network. A major challenge in Traffic Engineering is how to cope with dynamic and unpredictable changes in Traffic demand. In this paper, we propose COPE, a class of Traffic Engineering algorithms that optimize for the expected scenarios while providing a worst-case guarantee for unexpected scenarios. Using extensive evaluations based on real topologies and Traffic traces, we show that COPE can achieve efficient resource utilization and avoid network congestion in a wide variety of scenarios.
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Traffic Engineering with estimated Traffic matrices
Internet Measurement Conference, 2003Co-Authors: Matthew Roughan, Mikkel Thorup, Yin ZhangAbstract:Traffic Engineering and Traffic matrix estimation are often treated as separate fields, even though one of the major applications for a Traffic matrix is Traffic Engineering. In cases where a Traffic matrix cannot be measured directly, it may still be estimated from indirect data (such as link measurements), but these estimates contain errors. Yet little thought has been given to the effects of inexact Traffic estimates on Traffic Engineering. In this paper we consider how well Traffic Engineering works with estimated Traffic matrices in the context of a specific task; namely that of optimizing network routing to minimize congestion, measured by maximum link-utilization. Our basic question is: how well is the real Traffic routed if the routing is only optimized for an estimated Traffic matrix? We compare against optimal routing of the real Traffic using data derived from an operational tier-1 ISP. We find that the magnitude of errors in the Traffic matrix estimate is not, in itself, a good indicator of the performance of that estimate in route optimization. Likewise, the optimal algorithm for Traffic Engineering given knowledge of the real Traffic matrix is no longer the best with only the estimated Traffic matrix as input. Our main practical finding is that the combination of a known Traffic matrix estimation technique and a known Traffic Engineering technique can get close to the optimum in avoiding congestion for the real Traffic. We even demonstrate stability in the sense that routing optimized on data from one day continued to perform well on subsequent days. This stability is crucial for the practical relevance to off-line Traffic Engineering, as it can be performed by ISPs today.
