计算机原理介绍英文版

Importing TrafficOverview This lesson demonstrates the traffic import capabilities of Modeler. In this lesson, you will Examine a ready-made model that contains explicit traffic Import conversation pair traffic Run several simulations to see the effect of traffic growth on the network

In earlier tutorials, you built a network manually bydragging objects from a palette, then you added background load traffic by specifying throughput.This tutorial shows how you can import traffic from external sources. You might import a router configuration file or VNE Server database to create the topology, then import data from different tools, such as NetScout nGenius, Cisco Netflow, or a custom text file to create the traffic. Reviewing the Ready-Made Model This tutorial uses a ready-made model with explicit traffic. 1 Choose File > Open… ? The Open dialog box appears. 2 Select Project in the “Files of type” menu (Windows) or Filters menu (Linux/Solaris). Then navigate to the basic folder using the following path: \models\std\tutorial_req\basic 3 Select Imp_Data from the list of files, then click Open. ? The network model opens in the workspace. 4 Choose File > Save As…, navigate to your default models directory, and save the project as _Imp_Data. There are several types of traffic in Modeler: ?Explicitly generated traffic is user-created; you specify the size of the transactions and the number of transactions per time unit according to a chosen distribution. You create explicit traffic by configuring Application Definition and Profile Definition objects. Traffic flows (also called conversation pairs or background routed traffic) are special objects that specify end-to-end traffic between source and destination nodes. You can create traffic flows manually using demand objects from the object palette or import them from an external source (Traffic > Import Traffic Flows…). Link Baseline Load traffic specifies the background traffic in