Abstract
This chapter focuses on the identification and characterization of traffic flows in a network. Flow analysis takes an end-to-end perspective of network performance requirements, combining capacity, delay, and network reliability, maintainability, and availability (RMA) requirements into a specification that is used as input to the network architecture and design, to evaluate and help select technologies and diversity strategies for the network. The chapter discusses individual, composite, and critical flows and how to determine when each applies. It describes mechanisms to help identify and characterize flows, including data sources and sinks and flow models. The chapter discusses flow specifications, where performance requirements are combined for a flow or group of flows. Flow specifications are used as input to the network architecture and design processes. In building the flow specification, various techniques are used, including data sources and sinks and flow models, to identify and determine individual and composite flows as well as critical flows.
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