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


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


CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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).


This section describes the purpose of energy-saving management and the energy-saving management features supported by the device.


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 port dormancy, and automatic laser shutdown (ALS).

  • 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 system 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 system detects that the LOS of the optical interface is cleared and enables the laser to send pulses.

  • 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 normal working state.

Updated: 2019-08-09

Document ID: EDOC1000041694

Views: 57251

Downloads: 3617

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