Symptom

Error in the firepower management console for registered device where health monitor's 'interface status' module is showing an unknown or blank interface indicating it is not receiving any packets.

Conditions

Any Firepower Threat Defense device configured to use port-channel or sub-interface interface types with the 'interface status' health module enabled in the deployed health policy. Device is registered with a Firepower Management Center that manages device's health monitor policy and monitors device health status.

Workaround

Use the Firepower Management Center to disable the 'interface status' health module in the health policy that is deployed to the device.

Further Problem Description