Checking the following connections and settings might resolve Sensor failover issues:
- The Sensor model and Sensor image version on both the peer Sensors should be the same.
- The Sensor license and IPv6 status should be identical on the peer Sensors.
- Identify the interconnect port for the selected model because the interconnect ports vary for different models.
- Check on the FO type setting on the Sensor. The failover creation would fail if the FO type is set on the primary Sensor.
- The Sensor health status should be good and normal.