Manual Chapter : Troubleshooting options

Applies To:

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  • 1.6.1, 1.5.0, 1.3.2, 1.3.1, 1.3.0, 1.2.2, 1.2.1, 1.2.0, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0
Manual Chapter

Troubleshooting options

If you have trouble getting the
system set up and configured, there are some options available to help you.
Many functions in the system will log events to the
file. In the CLI, you can use the
file list path
command to view the files in the
You can also search the knowledge articles on

Generate system reports (QKView) from the webUI

If you want to upload a QKView file to the F5 iHealth server, your
system must have DNS configured and have internet access to these services using the HTTPS/443 remote service/port:
You can generate a QKView file from either the system controller or chassis partition webUI. Both reports contain diagnostic information, such as configuration data, log files, time series statistics, and platform information.
  1. Log in to the VELOS system controller webUI or the chassis partition webUI using an account with admin access.
  2. On the left, click
    System Reports
    The System Reports screen displays. A list of QKView files that were previously generated are shown with any reports that were uploaded to iHealth.
  3. To generate a system report, click
    Generate QKView
    in the upper right corner of the screen.
    The Generate QKView box displays these additional options:
    Specify a name for the file to which QKView file data is written. The default filename is <
    Timeout Value
    Specify the time in seconds after which to stop QKView file data collection. The default value is 0, which indicates no timeout.
    Max File Size
    Exclude all files greater than the specified size (in MB). The range is from 2 MB to 1000 MB. The default value is 500 MB.
    Max Core Size
    Exclude core files greater than this size (in MB). The range is from 2 MB to 1000 MB. The default value for maximum core size is 25 MB.
    Exclude Cores
    Specify whether core files should be excluded from the QKView file. The default is to include core files.
    The system runs many commands to collect the diagnostic information, so generating the report might affect its performance.
    It takes a few minutes for the system to finish creating the report and list it on the screen. The QKView Status changes to
    File generated successfully
    when it is done.
  4. To upload the report to the F5 iHealth server, select the check box next to the QKView name and click
    Upload to iHealth
    For information on uploading the report using a web proxy, see "Configure iHealth uploads and web proxy from the webUI".
    The QKView tar file uploads to iHealth, where you can get help to diagnose the health and proper operation of the system. You can view the report at
  5. To delete a QKView file, select it and click

Generate a tcpdump

You can use the
utility to capture traffic in chassis partitions. You can then save the captured traffic as a file that can be analyzed to help troubleshoot network issues.
  1. Connect using SSH to the chassis partition management IP address.
  2. Log in to the command line interface (CLI) of the chassis partition using an account with admin access.
    When you log in to the system, you are in user (operational) mode.
  3. Generate a tcpdump.
    system diagnostics tcpdump
    These options are available to use with this command:
    -i | interface
    Specifies the interface on which to capture packets. Omit or specify
    to indicate all interfaces.
    This example captures traffic on interface 1.0 on blade number 2:
    system diagnostics tcpdump interface 2/1.0
    -w | outfile
    Specifies the pcap file to write the captured packets.
    This example sends the output to a specified directory:
    system diagnostics tcpdump outfile <
    Specifies the Berkeley packet filter (BPF) expression for tcpdump. This option uses standard BPF syntax.
    This example captures traffic where the source IP address is and the destination port is 80:
    system diagnostics tcpdump bpf "src host and dst port 80"
    The system supports the use of standard tcpdump options. For more information, see

Other file and configuration management commands

You can also use these commands to help with troubleshooting. You can type a question mark (
) or press the Tab key to see possible command completions in the CLI.
For a comprehensive list of CLI commands, see the CLI Reference for your
system at
system database config config-backup config-restore
Saves the CDB configuration to an XML file and restores CDB configuration.
file list path <
Displays the contents of the specified directory.
file show <
Displays the contents of a specified file.