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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
How Can I Adjust the Fan Speed?

How Can I Adjust the Fan Speed?


By default, the system automatically adjusts the fan speed. You can also run the set fan-speed fan slot-id percent percent command to configure the fan speed.

  • View the fan speed.
    <Huawei> display fan
              FanId  FanNum  Present  Register  Speed  Mode                         
              12     [1-5]   YES      YES         34%  AUTO                         
                        1                        2100                               
                        2                        2040                               
                        3                        2100                               
                        4                        2130                               
                        5                        2100                               
  • View the device temperature thresholds. When the device temperature exceeds the upper threshold, fans on the device rotate at full speed.
    <Huawei> display temperature all                                                                                                    
     Slot  Card  Sensor No.  SensorName          Status    Upper  Lower  Temp(C)    
     1     -     1           2FE TEMP            NORMAL    75     0      40         
     2     -     1           1SA TEMP            NORMAL    74     0      53         
     3     -     1           1CPOS-155M TEMP     NORMAL    90     0      53         
     4     -     1           1ADSL-A/M TEMP      NORMAL    70     0      49         
     5     -     1           8FE1GE TEMP         NORMAL    55     0      57         
     8     -     1           1STM4 TEMP          NORMAL    74     0      39         
     11    -     1           SRU40 TEMP          NORMAL    70     0      51  

More Information

You are advised to retain the intelligent fan speed adjustment policy. Do not manually change the fan speed; otherwise, loud fan noises are generated and low fan speed may cause device faults. If you must change the fan speed, change the fan speed under the instruction of Huawei technical support personnel.

Whether switches have fans depends on device models. Some devices have fan modules, some devices have built-in fans, while some devices do not have fans and use natural heat dissipation.

Devices that have fan modules or built-in fans use the intelligent fan speed adjustment policy by default. That is, fans automatically adjust the fan speed based on the current device temperature.

If a fan of a device does not rotate, the following situations may occur:
  • Fan blades are blocked: Clean the fan blades.
  • The fan is not installed properly: Ensure that the fan is connected securely.
  • The fan has a hardware fault. If other fans are rotating or a new fan can rotate after being installed, the fan experiences a hardware fault and needs to be replaced.
Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 453308

Downloads: 4311

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