tailieunhanh - Thực hiện chất lượng dịch vụ trong các mạng IP (P4)

Traffic Engineering for Multi-service IP Networks Traffic engineering is a set of techniques and tools that can be used to optimize the performance of an operational IP network. An overarching concept, traffic engineering, broadly interpreted, includes other topics discussed in this chapter: routing control mechanisms such as MPLS, and an advanced configuration in the form of policy-based management. These techniques can also be used without deploying the complete traffic engineering framework, but their optimal use benefits from it | 4 Traffic Engineering for Multi-service IP Networks Traffic engineering is a set of techniques and tools that can be used to optimize the performance of an operational IP network. An overarching concept traffic engineering broadly interpreted includes other topics discussed in this chapter routing control mechanisms such as MPLS and an advanced configuration in the form of policy-based management. These techniques can also be used without deploying the complete traffic engineering framework but their optimal use benefits from it. For example we shall see that most efficient use of routing control is possible with proper measurement technologies in the network. Traffic engineering is also a cornerstone for the management of a multi-service IP network in a cost-efficient manner. Supporting services in the network in a commercial environment requires that the status of the network is monitored optimized and controlled. The traffic engineering framework uses service level management and monitoring techniques explained later in Chapters 6 and 7. Especially in the presence of growing traffic volumes the effectiveness of traffic engineering also has implications on network planning and - when used - admission control decisions which is why it can be said that traffic engineering also lays the foundation for the application of techniques in Chapter 5 and Chapter 8. Finally traffic engineering typically makes use of the service Implementing Service Quality in IP Networks Vilho Raisanen 2003 John Wiley Sons Ltd ISBN 0-470-84793-X 98 TRAFFIC ENGINEERING FOR MULTI-SERVICE IP NETWORKS quality support mechanisms described in Chapter 3. The relation to end user service quality discussed in Chapter 2 is that ideally traffic engineering is a set of network-side techniques providing engineered quality support level for individual services as the name of the concept implies. TRAFFIC ENGINEERING The traffic engineering TE overview RFC3272 of lETF s Traffic Engineering working .

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