Prerequisite
The interface is enabled with ALS and works in manual restart mode.
Context
When an interface detects the LOS, the laser of the optical module stops sending pulses. If the
als restart command is not used, the laser will not be restarted. If the interface still detects the
LOS after the laser is started manually, the laser is stopped again. If the interface detects that
the LOS is cleared, the laser of an optical module sends pulses and data communication is
recovered.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
als restart
The laser of an optical module is started manually. Then the laser sends a pulse.
----End
9.3.5 (Optional) Setting the ALS Pulse Interval and Width of the
Laser
You can set the proper laser pulse interval and width to ensure energy conservation and emission
deduction and timely detection of fiber link recovery.
Prerequisite
The interface is enabled with ALS and works in automatic restart mode.
Context
The ALS pulse width refers to the duration in which a laser sends pulses; the ALS pulse interval
refers to the period between rising edges of pulses. A smaller pulse width and a greater pulse
interval save more energy but reduce the speed of fiber link recovery.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
Quidway S5700 Series Ethernet Switches
Configuration Guide - Device Management 9 ALS Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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