Troubleshooting Tip: How to prevent repeated Negotiated Speed: 100 alerts for Fast Ethernet devices in FortiAIOps

When a Fast Ethernet device is connected to a Gigabit port on a FortiSwitch, FortiAIOps detects that the negotiated speed is lower than the maximum supported port speed. As a result, periodic alerts are generated, indicating a potential connectivity issue.

Starting from FortiAIOps version 3.2, an Advanced Alert Acknowledgement feature is available to suppress false positive alerts.

To create a new Event Acknowledgement, go to AI Insights -> Impacted SLAs -> Switching, select the affected network device from the list, and select Acknowledge.

Configure the acknowledgement settings as follows.

• Name: Defines the name of the acknowledgement.
• SLA Name: Predefined when created from a selected event or device.
• Sub Classifier: Predefined when created from a selected event or device.
• FortiGate: Defines the FortiGate to which the acknowledgement applies.
• Switch: Defines the FortiSwitch to which the acknowledgement applies.
• Port: Defines the FortiSwitch port to which the acknowledgement applies.
• Time Duration:

  • Forever: The acknowledgement remains permanently.

  • Select Duration: Defines a temporary suppression period.

• Action: Suppress (Pre-selected).

Note: To suppress the same alert across all devices, select 'ALL' for FortiGate, FortiSwitch, and the Port. This configuration is not recommended, as it may suppress valid alerts for actual speed negotiation issues on Gigabit-capable devices.

All created acknowledgements can be found under AI Insights -> Event Acknowledgement.