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03 Evaluating WAN Performance Lab Manual

03 Evaluating WAN Performance Lab Manual - Lab 3 Evaluating...

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OPNET IT Guru Lab 3, Page 1 Lab 3: Evaluating Application Performance across a WAN Objective In this lab, we have a small LAN with 20 users for a startup company named Deltasoft Technologies. We investigate the application performance for this company over a T1 line. We will also plan the network by adding a redundant link between the LAN and the ISP. Overview Deltasoft Technologies’ LAN consists of 20 user PCs sharing three printers and a local file and email server. The users run different online applications including E-mail, web browsing, video streaming, and FTP. Users also run locally served applications like intranet E-mail, print, and database access. Our goal is to study the response time for two critical tasks: FTP downloads and Web Page downloads. We’ll also analyze the link utilization between the LAN and the ISP. After an initial assessment, we’ll split the LAN into two smaller switched segments and add an extra T1 link between the LAN and the ISP to double the available capacity. Load balancing will ensure that both T1 links are equally utilized. Then we’ll study the effect of failing one of the devices and see the advantage of having the redundant link. Lab Instructions Step 1: Open Lab 1 1. Start IT Guru. 2. Select File ° Open… 3. Scroll down to the project named Small_Company_LAN_over_WAN , select it and click OK .
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OPNET IT Guru Lab 3, Page 2 Deltasoft Technologies’ network is laid out as mentioned in the overview. The company also has a shared local E-mail and File Server. As an exercise, add a server from the Object Palette and configure it for E-mail and File Sharing applications. This will give you an example of how objects are deployed to modify a network model.
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OPNET IT Guru Lab 3, Page 3 Step 2: Add a local Server 1. Open the Object Palette . 2. There are a lot of different objects, which represent network components. From the pull-down menu at the top, you can select a group of components by vendor or protocol. 3. Select ethernet from the pull-down menu. 4. Select ethernet_server form the palette and click on the workspace to deploy the server. Right-click in the workspace to stop deploying more servers. 5. To add a link connecting the server and the switch, select the 10BaseT link from the Object Palette. 6. Click on the 10BT_Switch and then on the server you just added. Right- click in the workspace to stop deploying more links.
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