checking the fan status on the device.

Understanding how the threshold system works for sensor monitoring on your F5 device is crucial for maintaining the health and performance of the system. The thresholds determine when the system will flag a sensor reading as normal, warning, or critical. Here’s a detailed explanation of how this typically works:

Threshold System Overview

1. Sensor Measurement: The system continuously monitors various sensors, such as fan speeds, temperatures, voltages, etc.
2. Thresholds: Each sensor has predefined thresholds that specify what values are considered normal, warning, or critical. These thresholds can include:
   • Lower Critical (LC): The value below which the sensor reading is considered critical.
   • Lower Warning (LW): The value below which the sensor reading is considered a warning.
   • Upper Warning (UW): The value above which the sensor reading is considered a warning.
   • Upper Critical (UC): The value above which the sensor reading is considered critical.
3. Hysteresis: This is a value used to prevent frequent toggling of the sensor status. It creates a buffer zone so that minor fluctuations around the threshold do not cause constant status changes.

Example of Thresholds

For a fan speed sensor:

• LC: 500 RPM (below this is critical)
• LW: 750 RPM (below this is warning)
• UW: 5000 RPM (above this is warning)
• UC: 5500 RPM (above this is critical)

View Current Thresholds:

tmsh show /sys hardware