Purpose of energy-saving technologies
As network scale enlarges, device power consumption increases enterprise operating expense. Energy-saving becomes the major concern in network construction. Devices use multiple energy-saving technologies to reduce power consumption.
Energy-Saving Management Features Supported by the Device
The device supports energy-saving features such as intelligent fan speed adjustment, Energy Efficient Ethernet (EEE), and automatic laser shutdown (ALS).
Intelligent Fan Speed Adjustment
The device adopts intelligent fan speed adjustment technology to monitor the temperature of key components. If a sensitive component overheats, the fan speed increases; when the temperature falls back to its normal range, the fan speed decreases. In this way, the fan module enables the device to run in normal temperature and reduces power consumption and noise.
ALS
The automatic laser shutdown (ALS) mechanism controls the pulse of the laser of an optical module by detecting the Loss of Signal (LOS) on an optical interface. The ALS mechanism protects operators against laser injury and saves energy.
When ALS is disabled, if the optical fiber link fails, data communication is interrupted. However, the optical interface and the laser of an optical module are enabled. If the laser of an optical module still sends pulses after data communication is interrupted, energy is wasted and eyes of operators may be hurt.
When ALS is enabled, if the optical fiber link fails, the software automatically disables the laser of an optical module from sending pulses on the optical interface after detecting the LOS on the optical interface. When the faulty optical fiber link is recovered, the software detects that the LOS of the optical interface is cleared and enables the laser to send pulses.
EEE
Energy Efficient Ethernet (EEE) dynamically adjusts the electrical interface power according to network traffic volume.
When the EEE function is not configured on the electrical interface, the system provides power for each interface. Even though an interface is idle, it consumes the same power as working interfaces. After the EEE function is configured, the system reduces the power on an interface when the interface is idle and restores the power when the interface starts to transmit data. This reduces power consumption in the system.
Port Dormancy
In port dormancy mode, the physical layer (PHY) chip on the electrical interface enters the low energy consumption mode to reduce power consumption. When interfaces are not connected, major data transmission channels of the chip enter the dormancy state to save energy. When interfaces are connected and traffic on the cable is detected, the PHY chip restores to the normal working state.
Energy-Saving Mode
Besides intelligent fan speed adjustment and ALS, the device saves energy through the energy-saving mode.
The device supports the following energy-saving modes:
User-defined mode: Users set the energy-saving mode as service requires.
Standard mode: Factory mode and default power-saving mode.
Basic energy-saving mode: Components not in use are shut down or switched to the dormant state. This mode reduces the system response speed when new services are configured or new users go online.
Deep mode: Components not in use are shut down or switched to the dormant state. This mode adjusts the power consumption dynamically according to the actual situation of services.
Source:
https://support.huawei.com/enterprise/en/doc/EDOC1100064365/40932589/overview-of-energy-saving-management
