How to Use a Network Traffic Generator

Written by dave wilson
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How to Use a Network Traffic Generator
Determine network performance capability using a network traffic generator before starting new applications. (global computer network image by Michael Brown from Fotolia.com)

Testing the performance level of a network infrastructure before deploying new applications includes measuring the available bandwidth on the network periodically throughout the day. Network traffic generator test tools can help by generating traffic flows across a given network path, then measuring the status of each network device (such as switches, routers and firewalls) along the path to detect and address any errors. Run custom network test streams using a network traffic generator application to verify network infrastructure readiness before application deployment.

Skill level:
Easy

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Things you need

  • Two Microsoft Windows computers with Jperf, Iperf or Ostinato installed
  • Directory path to the Ostinato, Jperf or Iperf program folder

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Instructions

  1. 1

    Log in to the Windows computer using the user name and password of an administrator account. Click the "Start" button on the desktop, then click "Programs" or "All Programs" and "Accessories." Click the "Command Line" icon in the menu that appears.

  2. 2

    Type "cd C:\path_to_Ostinato" on the command line, replacing "path_to_Ostinato" with the path to the Ostinato program folder. Press "Enter." Type "ipconfig" and note the IP address of the computer in the command line output. Type "drone" and press "Enter."

  3. 3

    Go to the other Windows computer that has Ostinato installed. Click "Start," then "Programs" or "All Programs." Click "Accessories," then click the "command line icon" in the menu that appears.

  4. 4

    Type "cd C:\path_to_Ostinato" at the command prompt but replace "path_to_Ostinato" with the directory path to the Ostinato program folder. Press "Enter." Type "ipconfig" and note the IP address of the computer in the command line output.

  5. 5

    Type "Ostinato.exe" and press "Enter." Click the "Port Group" item located in the upper-left corner of the "Ostinato" window that appears. Click on the port under the "Port Group" header that has same name as the network adaptor you use to connect to the network. Right-click in the "Stream" section to the right of the "Port Group" section and click "New Stream" in the menu that appears. Double-click on the new stream item you just created.

  6. 6

    In the window that appears, select "Mac" in the "L1" section, "Ethernet II" in the "L2" section, "IPv4" in the "L3" section, "TCP" in the "L4" section and "Pattern" in the "Payload" section. Select the "Protocol Date" tab and "Internet Protocol ver 4," then type the IP address of the computer upon which the "Ostinato" program is running.

  7. 7

    Type the IP address of the Windows computer running the "Drone" program into the destination IP address field. Click on the "Stream Control" tab and type "1000" in the "Number of Packets" field.

  8. 8

    Click "OK," then click "Apply" in the main "Ostinato" window. Click once on the port you just configured to transmit a stream. Click "Start Transmit" to generate traffic over the network.

  1. 1

    Boot, then log in to a Windows computer that has Iperf installed using the credentials of an administrator account. Click the "Start" button, then click the "Search" or "Run" box, and type "cmd" in the "Search" or "Run" box. Press "Enter."

  2. 2

    Type "ipconfig" and note the computer's IP address in the command line output. Type "iperf --s" and press "Enter" to start Iperf in server mode.

  3. 3

    Go to the other Windows computer on the network you are testing with Iperf and log in using the user name and password of an administrator account. Click "Start," then click the "Search" or "Run" box, and type "cmd." Press "Enter." Type "iperf --c x.x.x.x" but replace the "x.x.x.x" with the IP address of the computer running Iperf in server mode and press "Enter." Iperf will then commence sending traffic over the network to the computer running Iperf in server mode.

  1. 1

    Start up a Windows computer that has Jperf installed by providing the user name and password of an administrator account.

  2. 2

    Click the "Start" button, then click the "Search" or "Run" box and type "cmd." Press "Enter." Type "ipconfig" on the command line and press "Enter." Note the IP address displayed in the command line output. Click "Start" and "Programs," then click "Jperf." Click the "Server" radio button.

  3. 3

    Go to another Windows computer on the network that has Jperf installed and log in using the credentials of an administrator account. Open the Jperf program, then click the "Client" radio button in the window that appears. Type the IP address of the computer running Jperf in server mode into the "Server" field, then click the square button with the blue circle in it on the upper-right corner of the Jperf window. Jperf will commence sending network traffic to the Windows computer running Jperf in server mode.

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