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/system health settings set
Available parameters properties are described below:
| Property | Description |
|---|---|
| fan-full-speed-temp (integer [-273..65]; Default: 65) | Sets the temperature value upon which the fan speed will be increased to the maximum possible rpm. Reads temperature from CPU, PHY, SWITCH and SFP and adjusts fan speed based on the component with the highest temperature. |
| fan-target-temp (integer [-273..65]; Default: 58) | Sets the target temperature for the hottest component. Based on this setting adjusts fan behavior to hold temperatures in target range. |
Value range for this setting is -273 to 65
| fan-min-speed-percent (integer [0..100]; Default: 0) | Sets the minimum percentage of fan speed thus not allowing fans to have a lower rpm than this value. |
| fan-control-interval (integer [5..30]; Default: 30) | Sets the actual temperature data read interval to get temperature values from CPU, PHY, SWITCH and SFP. |
*NOTE: THIS SETTING DIRECTLY AFFECTS CPU USAGE |
CPU and SFP temperature
If CPU or SFP temperatures exceed 58C, the fans will start to spin. The higher the temperature, the faster the fans will spin. For devices with PWM fans, as the CPU or SFP temperatures exceed 58C, the fans will linearly increase their RPM to try to keep the temperature at 58C if possible. For devices with DC fans, as the CPU or SFP temperatures exceed 58C, the fans will start spinning but at a higher minimum RPM by default. This may result in cooling the device to the point where the fans turn-off completely. After which the temperature may slowly increase to 58C and the fans will turn on again. Currently, there is one exception. The S+RJ10 modules have a temperature threshold of 65C before they trigger the fans. Since it's a higher temperature threshold, the fans will start spinning at a higher initial speed to cool the device.
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