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# Basic troubleshooting techniques

HPE OneView has a variety of troubleshooting tools you can use to resolve issues. By following a combined approach of examining screens and logs, you can obtain a history of activity and the errors encountered.

- The Activity screen displays a log of all changes made on the appliance, whether user-initiated or appliance-initiated. It is similar to an audit log, but with finer detail and it is easier to access from the UI.

  The Activity screen also provides a log of health alerts and status notifications.

- Download an audit log to help you understand what security relevant actions took place on the system.

- Create a support dump file to gather logs and other information required for debugging into an encrypted, compressed file that you can send to your authorized support representative for analysis.

- Review reports for interconnect, server, and enclosure status. Reports can also provide inventory information and help you see the types of server models and processors in your data center. They can also show you what firmware needs to be updated.

| NOTE: If the UI is not available, you can use the Maintenance console for troubleshooting.

Recommendation | Details
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Look for a message | About syntax errors: The user interface checks for syntax when you enter a value. If you make a syntax error, an instructional message appears next to the entry. The user interface or command line continues to display messages until you enter the correct value. About network setup errors: Before applying them, the appliance verifies key network parameters like the IP address and the fully qualified domain name (FQDN), to ensure that they have the proper format. After network settings are applied, the appliance performs additional validation, such as reachability checks and host name to IP lookup. If a parameter is incorrect, the appliance generates an alert that describes validation errors for the Network Interface Card (NIC), and the connection between the browser and the appliance can be lost. About reported serious errors: Check connectivity to the enclosure from the appliance. Create a support dump and contact your authorized support representative.
Examine the Activity screen | To find a message for an activity:
| NOTE: You might need to perform these steps from the virtual console.
Locate recent activities with a Critical or Warning status. For information, see Filter activities. Expand the activity to see recommendations on how to resolve the error. Follow the instructions.
Examine the appliance virtual machine | When VM host is down or nonresponsive: From the local computer, use the `ping` command to determine if you can reach the appliance. If the `ping` command is successful, determine that the browser settings, especially the proxy server, are correct. Consider bypassing the proxy server. If the `ping` command did not reach the appliance, ensure that the appliance is connected to the network. Log onto hypervisor to verify that the hypervisor is running. Verify that the virtual guest for the appliance is operational. Ensure that the VM host configuration is valid. Verify the accuracy of the IP address and other network parameters for the VM host. From the management console, ensure that the appliance network settings are accurate. For information, see Change the appliance network settings. Examine the hypervisor performance data. If the appliance is running at 100% utilization, restart the hypervisor.

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