Debugging and Monitoring Fault Tolerance Activity

All state changes and IP address transfers are logged in the event logs of each relevant Virtual Traffic Manager. If email alerting is correctly configured (see Event Handling and Alerts), the Virtual Traffic Manager also sends an email message describing the state change and any IP address transfers that resulted to the system administrator.

For detailed debugging, enable the flipper!verbose setting. This causes each Virtual Traffic Manager to log every single connectivity test, broadcast message sent and broadcast message received, and is useful when determining why the fault tolerance behavior is not as expected.

See also the Cluster Diagnosis page in the Diagnose section of the Admin UI. This page informs you if any broadcast messages are not being received correctly, and provides a summary of the system status if an error has occurred.

For detailed information on your Route Health Injection status, see the Diagnosis > Routing page of the Admin UI.