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New Backplane Causes It Impossible to Register the NE80E SFU

Publication Date:  2012-07-27 Views:  34 Downloads:  0
Issue Description
At a site, the NE80E originally had four SFUs. After the SFUs at slot 21 and slot 22 were pulled out, the remaining two SFUs could not be registered, which caused it impossible to register the service board.
In normal circumstances, any of the SFUs can be registered. 
 
Alarm Information
NE80E’s Device status:
Slot #         Type       Online         Register          Status      Primary
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1            LPU/SPU   Present    Unregistered   Abnormal    NA
2            LPU/SPU   Present    Unregistered    Abnormal   NA
17          MPU            Present    NA                      Normal       Master
18          MPU            Present    Registered       Normal       Slave
19         SFU              Present    Unregistered    Abnormal   NA
20         SFU              Present    Unregistered    Abnormal   NA
23         CLK              Present    Registered        Normal      Master
24         CLK              Present    Registered        Normal      Slave 
 
Handling Process
1. When four SFUs are all in place, they can be registered.
2. When SFUs are pulled out of slot 21 and 22, the SFUs in slot 19 and 20 cannot be registered.
3. Run the dis version command to view the version of the backplane:
===============display version===============
===================================================
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.30 (NE40E&80E V300R002C06B325)
Copyright (C) 2000-2008 Huawei Technologies Co., Ltd
Quidway NetEngine 80E uptime is 0 day, 6 hours, 35 minutes

BKP 0 version information:
1. PCB Version : CR52BKPC REV A
2. MPU Slot Quantity: 2
3. SRU Slot Quantity: 0
4. SFU Slot Quantity: 4
5. LPU Slot Quantity: 16
The type of the backplane is BKPC, a new board that should be preferentially inserted into slot 21 or 22.
4. The fault was removed after the SFUs were moved to slot 21 and 22.
If there is only one SFUF, this board must be inserted into slot 21 or 22 so that the LPUs can be registered. If the SFUF is inserted into slot 19 or 20, no LPUs can be registered.
If there are two SFUFs, the two boards must be inserted into slot 21 and 22 so that the switching network synchronization clock can be backed up. If one of the SFUFs is inserted into slot 19 or 20, the system prints the information that the SFUF at slot 20 or 20 cannot be registered and prompts that this SFUF must be moved to slot 21 or 22 although the LPUs can be registered. In the system running process, if the board at slot 21 or 22 cannot be registered, the other SFUF is not affected.
In the case of three SFUFs, two of them must be inserted into slot 21 and 22 for the same reason given in the preceding section. The last one can be inserted into slot 19 or 20. In the system running process, if the board at slot 21 or 22 cannot be registered, the other two SFUFs are not affected.
In the case of four SFUFs, if the board at slot 21 or 22 cannot be registered in the system running process, the other three SFUFs are not affected. 
 
Root Cause
New backplanes were adopted for the current network.
The switching network synchronization clock of the old backplanes (BKPA) are provided by the MPU, but the synchronization clock of the new backplanes (BKPC) are provided by the SFUs (at slot 21 and slot 22). If no SFUs are found at the two slots, the equipment cannot find the synchronization clock. That was why the remaining SFUs could not be registered. In the case of two SFUs, they must be inserted into slot 21 and slot 22.

In addition,
1. The switching network synchronization clock, which was originally enabled on the MPU, was added to CR52SFUF, which was developed on the basis of CR52SFUA. Thus, CR52SFUF provided the 40 MB synchronization clock for all SD567 and SD566 modules of the entire system.
2. When CR52SFUA is applied to BKPA, the boards can work normally in the V100R002, V300R001, and V300R002 environments.
When CR52SFUF is applied to BKPA, the boards can work normally. However, note that EPLD of SFUF cannot be upgraded in the V100R002 and V300R001 environments. In addition, the version of SFUF is displayed as CR52SFUA VG. 
 
Suggestions
The types of backplanes also affect the registration of boards. 

END