No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Device Management

S1720, S2700, S5700, and S6720 V200R011C10

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
Rate and give feedback:
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).
Displaying the Fan Status

Displaying the Fan Status

Context

Fans must operate normally to ensure normal operation of a device. Inefficient heat dissipation will increase the device temperature and may damage the hardware. You can use the following command to view the fan status and check whether fans are operating normally.

Procedure

  • Run the display fan command to view the fan status.

FAQ

Why I Cannot Obtain Fan Information?

On a device that uses natural heat dissipation and has no fan subcard or no built-in fan, the display fan command returns no fan information.
<HUAWEI> display fan
Info: There is no fan.

How Can I Adjust the Fan Speed?

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 technical support personnel.

Intelligent Fan Speed Adjustment

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

Devices that have fan subcards 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.

Reason Why a Fan Does Not Rotate and Solution

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.

How to Increase the Fan Speed

  • (Recommended) Run the set fan speed-adjust threshold minus command to set the temperature thresholds for fan speed adjustment so that you can increase the fan speed.
  • (Used with caution) Run the temperature threshold command to set the temperature alarm threshold Upper(C) to be smaller than the current device temperature Current(C). Subsequently, fans rotate at full speed.
    NOTE:

    This configuration enables fans to rotate at full speed, and so may generate loud fan noises and a high temperature alarm. Therefore, you are advised to use this command under the instruction of technical support personnel.

Commands Related to Fan Speed

  • View the fan speed.
    <HUAWEI> display fan
    -------------------------------------------------------------------------
     Slot  FanID   Online    Status    Speed     Mode     Airflow
    -------------------------------------------------------------------------
     0     1       Present   Normal    30%       Auto     Side-to-Side       
  • View the temperature thresholds for fan speed adjustment.
    <HUAWEI> display fan speed-adjust threshold minus
     -----------------------------------------------------------
     Slot     Default Range  Current Range  Speed Rate Adjusted
    -----------------------------------------------------------
      0          46 - 50         41 - 45        30%-100%
    
  • Set the temperature thresholds for fan speed adjustment.
    <HUAWEI> system-view
    [HUAWEI] set fan speed-adjust threshold minus 10
  • 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 Status    Current(C) Lower(C) Lower     Upper(C) Upper
                                                      Resume(C)          Resume(C)
    -------------------------------------------------------------------------------
     0     NA    NA     Normal     55        0        4         65       61
  • Set the device temperature thresholds. When the device temperature exceeds the upper threshold, fans on the device rotate at full speed.
    <HUAWEI> system-view
    [HUAWEI] temperature threshold slot all lower-limit 0 upper-limit 45
    

How Can I View Built-in Fan Information?

To view information about built-in fans, run the display fan command. A device has no fan subcard but has built-in fans if both of the following situations occur:
  • No fan information is displayed when you run the display device command.
  • The Online field displays Present when you run the display fan command.
The following is an example of the command output.
<HUAWEI> display device
S5700-52P-LI-AC's Device status:                                              
Slot Sub  Type                Online    Power      Register     Status   Role 
-------------------------------------------------------------------------------
0    -    S5700-52P-LI        Present   PowerOn    Registered   Normal   Master
<HUAWEI> display fan
-------------------------------------------------------------------------
 Slot  FanID   Online    Status    Speed     Mode     Airflow
-------------------------------------------------------------------------
 0     1       Present   Normal    40%       AUTO     Side-to-Side
Translation
Download
Updated: 2019-09-23

Document ID: EDOC1000178167

Views: 207725

Downloads: 995

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next