Running the iperf utility

The iperf utility generates a report with the results of network performance diagnostics. When you run the iperf utility again, the report is overwritten. You can download the previous report if you want to keep it.

To run the iperf utility:

  1. In the menu, go to the SD-WAN → CPE section.

    A table of CPE devices is displayed.

  2. Click the CPE device on which you want to run the iperf utility.

    The settings area is displayed in the lower part of the page. You can expand the settings area to fill the entire page by clicking the expand icon expand_panel_up_icon_2. By default, the Configuration tab is selected, which displays general information about the CPE device. This tab also displays the table of Out-of-band management tasks being performed by the orchestrator.

  3. Select the Utilities → Iperf tab.

    The iperf utility settings are displayed.

  4. Specify the mode in which you want to use the iperf utility on the CPE device by selecting one of the following options:
    • Server to use the CPE device as an iperf server.
    • Client to use the CPE device as an iperf client.
  5. If you chose the Server option, configure the iperf server:
    1. In the Port field, enter the TCP or UDP port number of the iperf server. Range of values: 1001 to 65,535. Default value: 7777.
    2. In the Report interval (sec.) field, enter the interval in seconds for writing lines to the report. Range of values: 0 to 60. Default value: 3.
    3. If you do not want to create a report with network performance diagnostics results, select the No report check box. This check box is cleared by default.
    4. Under Report format, select the format of the network performance diagnostics results in the report:
      • Kbit/sec. Default value.
      • Mbit/sec
      • Kbyte/sec
      • Mbyte/sec
    5. In the Run server for (sec.) field, enter the duration in seconds for which you want the iperf server to run. Range of values: 60 to 3600. Default value: 300.
  6. If you chose the Client option, configure the iperf client:
    1. In the Server IP field, enter the IPv4 address of the iperf server to which the iperf client connects.
    2. In the Port field, enter the TCP or UDP port number of the iperf server to which the iperf client connects. Range of values: 1001 to 65,535. Default value: 7777.
    3. In the Report interval (sec.) field, enter the interval in seconds for writing lines to the performance diagnostics report. Range of values: 0 to 60. Default value: 3.
    4. If you do not want to create a report with network performance diagnostics results, select the No report check box. This check box is cleared by default.
    5. Under Report format, select the format of the network performance diagnostics results in the report:
      • Kbit/sec. Default value.
      • Mbit/sec
      • Kbyte/sec
      • Mbyte/sec
    6. In the Run client for (sec.) field, enter the duration in seconds for which you want the iperf client to run. Range of values: 60 to 3600. Default value: 60.
    7. Specify the port type of the iperf server by selecting one of the following options:
      • TCP Default value.
      • UDP
    8. In the Client bitrate field, enter the bit rate of the iperf client in one of the following formats:
      • <bit rate in kbps>k or <bit rate in kbps>K

        For example, if you enter 10000K, the bit rate is 10,000 kbps.

      • <bit rate in Mbps>m or <bit rate in Mbps>M

        For example, if you enter 10M, the bit rate is 10 Mbps.

    9. In the Test direction drop-down list, select the direction of traffic that you want to use for measuring network performance:
      • Client-server to use the traffic that the iperf client sends to the iperf server. Default value.
      • Server-client to use the traffic that the iperf server sends to the iperf client.
      • Bidirectional to use traffic that the iperf client sends to the iperf server as well as the traffic that the iperf server sends to the iperf client.
    10. If necessary, in the TCP windows (bytes) field, enter the TCP window size in bytes. If you leave this field blank, the TCP window size is determined automatically.
    11. If necessary, in the TCP MSS (bytes) field, enter the maximum TCP segment size in bytes.
  7. Click Run.

The iperf utility is run on the CPE device, and a report with the network diagnostics results is generated.

To manage reports, click Go to files.

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