Abstract: After certain sets of huawei transmission equipment OptiX Metro 1000 V3 (SS49SCB VER.B) restart upon power failure, the SW1,SW2 DIP switch of the NE is in the installation state. As a result, the NE configuration is missing, and the services are interrupted.
[Problem Description]
Trigger conditions:
The OptiX Metro 1000 V3 (SS49SCB board) restarts upon power failure or is manually reset.
Fault symptom:
After the device restarts upon power failure, all the NE configurations are missing, and the services are interrupted.
Identification method:
1. The NE software version of the huawei metro transmission OptiX Metro 1000 V3 is 5.37.05.12. Hardware version of SS49SCB is VER.B:
:sys-get-nesoftver;
VERSION-INFORMATION
NESOFTNAME VER DATE STATE
NSF1 5.37.05.12 20080831 active
NSF2 5.37.05.12 20080831 inactive
BIOS 8.12.48 20100612 inactive
ExtBIOS 9.12.45 20100612 active
Pcb SS49SCB VER.B
Logic (U301)110
Total records :6
2. Run the following command:
:dm:0x70000000
If the result is not 0 (shown as follows, marked by red circle), it means that the OptiX Metro 1000 V3 NE (SS49SCB VER.B) encounters this problem after reset.
[Root Cause]
After the equipment test is complete, the DIP switch is not restored to the normal state. The DIP switches of certain SS49SCB boards are still in the installation state after the manufacture equipment test. The cause is described as follows: Normally, the actual unit test is complete within three minutes. The DIP switch fault can be detected. If the unit test is performed after the unit is powered on for 15 minutes, however, the NE with abnormal DIP switch status works properly after the equipment test. In this case, the unit test cannot detect the DIP switch fault.
[Impact and Risks]
All the NE configurations are missing after the OptiX Metro 1000 V3 device (SS49SCB board) restarts upon power failure or a cold reset is performed on the SS49SCB. The services are interrupted.
Products involved: OptiX Metro 1000 V3 (SS49SCB VER.B)
[Measures and Solutions]
Recovery measures:
NA
Workarounds:
NA
Solutions:
Power off the SS49SCB board, and remove the board. Then, set the SW1、SW2 DIP switch to the normal status. Insert the board. After the board runs properly, download the NE configuration through the NMS.
Note: The following figure shows the position of the SW1、SW2 DIP switch on the SS49SCB board. To set the DIP switch to the normal status means to switch bits to the ON side of DIP switch.
Solution of material handling after replacement:
NA
[Rectification Scope and Time Requirements]
NA
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