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switchover of NE40E LPU board is fault and lost management

Publication Date:  2013-07-05 Views:  44 Downloads:  0
Issue Description
board unregistred.
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.50 (NE40E&80E V300R003C02B697)
Copyright (C) 2000-2009 Huawei Technologies Co., Ltd.
Quidway NetEngine 40E uptime is 7 days, 3 hours, 55 minutes

Handling Process
problem board in slot 7:
display device
NE40E's Device status:
Slot # Type Online Register Status Primary
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1 LPU Present Registered Normal NA
2 LPU Present Registered Normal NA
3 LPU Present Registered Normal NA
4 LPU Present Registered Normal NA
5 LPU Present Registered Normal NA
7 LPU/SPU Present Unregistered Abnormal NA
9 MPU Present NA Normal Master
10 MPU Present Registered Normal Slave
11 SFU Present Registered Normal NA
12 SFU Present Registered Normal NA
13 SFU Present Registered Normal NA
14 SFU Present Registered Normal NA
15 CLK Present Registered Normal Master
16 CLK Present Registered Normal Slave
17 PWR Present NA Normal NA
18 PWR Present NA Normal NA
19 FAN Present Registered Normal NA
20 FAN Present Registered Normal NA
21 LCD Present Registered Normal NA

Root Cause
problem board in slot 7. if we check device info in hide mode, we can see that board is registred:
dis mbusnode
Type Slotid Register TempMon VoltMon Eeprom
-----------------------------------------------------------------
LPU 1 Registered 5 12 5
LPU 2 Registered 5 12 5
LPU 3 Registered 5 19 5
LPU 4 Registered 5 12 5
LPU 5 Registered 5 12 5
LPU 7 Registered 5 12 5
MPU 9 Registered 4 12 2
MPU 10 Registered 4 12 2
SFU 11 Registered 2 2 1
SFU 12 Registered 2 2 1
FAN 19 Registered 1 0 1
FAN 20 Registered 1 0 1
LCD 21 Registered 0 0 1

Solution
R&D designed that each slot has a fixed ID which express in 6 bit code.
When board plug in this slot, CBUS of this board could read this fixed ID and distinguish slot ID.
R&D suspects because a resistance of this board is invalidation, it causes that this LPU read a wrong slot ID and can’t register

Suggestions
replace board

END