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The Monitorbus of the Board Cannot Registered on the NE40E or Be Switched Due to the Failure of the Monitorbus Fastening Board

Publication Date:  2012-07-27 Views:  95 Downloads:  0
Issue Description
After the NE40E is power on, all the boards of the device can be registered on the NE40E normally, but cannot be switched. 
Alarm Information
Handling Process
1. Check the status of the salve SRU. The slave and master SRUs can be switched.
[Quidway]dis switchover state
Info:HA FSM State, Realtime and routine backup.
2. Run the following command to perform the switchover. The information that the Monitorbus of the slave SRU is abnormal is displayed.
[Quidway]slave switchover
Caution!!! Confirm switch slave to master[Y/N]?y
Apr 16 2008 15:01:02 Quidway %%01HA/4/SWITCHOVER(l): When deciding whether to switch slave to master, the user choose Y............................................................................
Can’t switch to slave , because the slave’s MBUS is abnormal!
Please try to reset slave’s MBUS for resume!
3. Run the display version command to check the version of the device. The Monitorbus version of the slave SRU is null:
MonitorBUS version information:
1. PCB Version : CR31MBSA REV V
2. EPLD Version : 000
3. Software Version : 0.0
4. The Monitorbus may be damaged. Check the Monitorbus registration in hidden mode. The Monitorbus at this slot is not registered.
[Quidway-hidecmd]display mbusnode
Type     Slotid     Register     TempMon     VoltMon    Eeprom
LPU         1         Registered       5                  18              5
LPU         8         Registered       5                  19              5
MPU        10       Registered       4                  12              3
SFU         11       Registered       2                  2                1
SFU         12       Registered       2                  2                1
FAN         19       Registered       1                  0                 1
5. The Monitorbus fastening board of the slave SRU may be damaged. Apply for replacing the fastening board with a new one. After the fastening board is replaced, the master and slave SRUs can be switched. 
Root Cause
The possible causes are:
1. The hot backup of the slave SRU is not complete.
2. The slave SRU or part of it fails. 
For the failure of the 8090 series, especially the hardware failure, you are recommended to locate the fault based on the clue hinted by the fault and the device. Taking the above case as an example. The switchover failure drives you to analyze the status of the Monitorbus on the slave SRU. You can follow that clue and find that the Monitorbus is not registered. Finally you draw the conclusion that the fault is caused by the hardware.