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S1720, S2700, S3700, S5700, S6700, S7700, and S9700 Series Switches Common Operation Guide

This document describes the CLI-based configurations of universal protocols and common features for Huawei switches on basic networks.
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Setting Temperature Thresholds for Adjusting the Fan Speed

Setting Temperature Thresholds for Adjusting the Fan Speed

By default, the device uses fixed temperature thresholds to increase and decrease the fan speed. The fan speed increases when the device temperature exceeds the upper threshold and decreases when the device temperature falls below the lower threshold. If you want to keep the device working at a lower temperature, set lower fixed temperature thresholds. When the device temperature reaches the lowered threshold for increasing the fan speed, the fan speed will increase. The fan speed will not decrease until the device temperature falls below the lower threshold for lowering the fan speed.

To view the original temperature thresholds and the adjusted thresholds, run the display fan speed-adjust threshold minus command.

# To reduce temperature thresholds for adjusting the fan speed by 10°C, run the following commands.

<HUAWEI> system-view
[HUAWEI] set fan speed-adjust threshold minus 10
Info: Succeeded in setting the fan speed-adjust threshold.
NOTE:
  • The new thresholds are the fixed temperature thresholds minus threshold-value.
  • If a device uses intelligent fan control, this command reduces the temperature thresholds for starting and stopping the fans. Fans in intelligent heat dissipation mode can only start and stop rotating at a fixed speed that cannot be increased or reduced.
  • You can run the display fan speed-adjust threshold minus command to check temperature thresholds for fan speed adjustment of fans in intelligent heat dissipation mode. Assume you view that the current temperature threshold of the fans is 40-50, in which 40°C is the threshold for stopping the fans, and 50°C is the threshold for starting the fans. When the current device temperature is 45°C, you need to determine whether fans will rotate according to the fan temperature change:
    • When the device temperature is increased to 45°C from a lower temperature (30°C for example), fans do not rotate because the device temperature does not reach the threshold for starting the fans.
    • When the device temperature is reduced to 45°C from a higher temperature (65°C for example), fans keep rotating because the device temperature does not fall below the threshold for stopping the fans.
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Updated: 2018-09-03

Document ID: EDOC1000057410

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