Monitoring Power and Cooling

If the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and use the show chassis command to verify that the temperature is below the shutdown threshold. If you still cannot isolate the problem, then the internal power supply may be defective. In this case, contact RUCKUS Technical Support for assistance.

Models with Fans

The device contains temperature sensors that the software reads based on a configurable device poll time. The device has two automatic speed fan control settings based on the temperature. To protect the device from overheating, the following temperature threshold levels exist:

  • The warning level is the temperature at which the device generates a syslog message.
  • The shutdown level is the temperature at which the device reboots. It is set by the device and is not configurable. When the device temperature reaches the shutdown level, it generates a warning message that the device’s temperature is over the shutdown level and the device shuts down in two minutes. The system restarts 120 seconds after the device falls back to the temperature shutdown level.

The switch fans have two speeds, low and high. The fan speed settings are set by the device, and are not configurable. During system bootup, the fans run at high speed. After bootup, the fans operate at low speed when the temperature of the switch is below the high limit temperature that is specified in the following table. If the switch reaches the high limit temperature, the fans operate at high speed until the switch reaches the low limit temperature specified in the table, at which time the fans decrease to low speed. If the switch reaches or exceeds the critical (shutdown) temperature for two minutes, the switch shuts down.

Note: In addition to the overall temperature of the device, the PoE-supported models monitor the temperature of the Power over Ethernet (PoE) power supply unit (PSU). When the low limit and high limit temperatures are reached, the PoE PSU fans change speed using the same algorithm as the module fans. There is no change to the Critical (shutdown) temperature value for these modules.

Temperature Thresholds

Switch Model Low Limit Temperature (°C) High Limit Temperature (°C) Critical (Shutdown) Temperature (°C)
ICX8100-C08PF 37 45 64
ICX8100-C08PF-V 37 45 64
ICX8100-C16P 37 45 64
ICX8100-24 37 45 64
ICX8100-24P 40 48 65
ICX8100-24P-V 40 48 65
ICX8100-48 40 48 65
ICX8100-48P 40 48 65
ICX8100-48PF 40 48 65
ICX8100-48PF-V 40 48 65
Note: Other RUCKUS platforms contain sensors on chips or are measured inside the chipsets, thereby yielding higher temperature readings than the ambient temperature measured in this switch. Both have comparable end results.

To display the temperature of a device, enter the show chassis command at any level of the CLI. The show chassis command displays the current temperature, the power supply status, and temperature threshold levels. The displayed temperature reflects the temperature of the board inside the device. 

device# show chassis 
The stack unit 1 chassis info: 

Power supply 1 (AC - PoE) present, status ok

Fanless model


Slot 1 Current Temperature: 44.7 deg-C (Sensor 1), 46.2 deg-C (Sensor 2), 45.7 deg-C (Sensor 3), 52.0 deg-C (Sensor 4), 45.0 deg-C (Sensor 5)
	Warning level.......: 77.0 deg-C
	Shutdown level......: 80.0 deg-C
Boot Prom MAC : 5c83.6c3f.d5ea
Management MAC: 5c83.6c3f.d5ea
Stack unit-1: The system was last powercycled on Friday, 2024-11-08 at 17:23:28+0000 (UTC), powercycle count: 16
Parent topic: Monitoring the Device