Cisco Catalyst SD-WAN Troubleshooting Guide

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Cisco Catalyst SD-WAN Troubleshooting Guide

Run internet speed test

Updated: September 28, 2026

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Configure an internet speed test to measure download and upload speeds between network endpoints using the troubleshooting tools.

Use this task to measure the download and upload speeds between network endpoints to assess network performance and troubleshoot connectivity issues.

The internet speed test feature allows you to evaluate network performance by testing bandwidth between a local device and internet destinations or specified iPerf3 servers.

Procedure

  1. From the Cisco SD-WAN Manager menu, choose Monitor > Devices.

    Cisco vManage Release 20.6.1 and earlier: From the Cisco SD-WAN Manager menu, choose Monitor > Network.

  2. To choose a device, click the device name in the Hostname column.

  3. Click Troubleshooting in the left pane.

  4. In the Connectivity area, click Speed Test.

  5. Specify the following parameters:

    • Source Circuit: From the drop-down list, choose the color of the tunnel interface on the local device.

    • Destination Device: From the drop-down list, choose Internet.

    • Minimum supported releases: Cisco vManage Release 20.10.1 and Cisco IOS XE Catalyst SD-WAN Release 17.10.1a

      • iPerf3 Server: (Optional) Enter the hostname or iPer3 server's IP address in IPv4 format.

      • Server Port Range: (Optional) Enter the server port or a port range. For example, 5201, 5210, or 5201-5205.

      • Built-in public iperf3 servers list and their port ranges:

        • ping.online.net (5203-5208)

        • iperf.par2.as49434.net (9231-9236)

        • paris.testdebit.info (9201-9240)

        • speedtest.serverius.net(5002)

        • speedtest.uztelecom.uz (5205-5209)

        • iperf.biznetnetworks.com (5201-5203)

      Note

      If you do no provide an iPerf3 server then the built-in iPerf3 servers will be automatically used. The Server Port Range option is only applicable when a user-specified iPerf3 server is entered. If no port range is provided, the system defaults to port 5201. When using the built-in servers, the speed test selects the server with the shortest ICMP ping RTT (Round-Trip Time).

  6. Click Start Test.

    The speed test begins to measure the download and upload speeds between the two endpoints.

The speed test completes and displays the download and upload speeds measured between the selected endpoints, providing network performance data for analysis.