Reseating Boards Without a CPU on MSTP NEs
Product Line
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Transport network product line
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Product Family
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Product Model
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Release Date
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2014-10-25
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Severity
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Major
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Urgency
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Non-urgent
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Versions Involved
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Versions earlier than V100R008C02SPC500
R009 and R010 versions earlier than V100R010C03SPC203
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Devices Involved
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OSN 1500/OSN 2500/OSN 3500/OSN 7500
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Application Scope
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Globally
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Operation Category
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Pre-warning
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Warning ID
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21212
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Operation Requirements
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Learning and prevention
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Expected Completion Date
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Manpower Required
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Contacts
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Product Line Contact
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Huang Deng (employee ID: 00254844)
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Regional Office Rectification Contact
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Representative Office Rectification Contact
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Keywords
Unexpected N4GSCC reset, reseating boards without a CPU, unreachable
[Problem Description]
Triggering conditions
l An NE houses N4GSCC boards.
l The NE runs a version involved.
l A technician reseats a board without a CPU or its serving processing board on the NE.
The following lists boards without a CPU:
Interface boards: SSN1D75S, SSN1D12S, SSN1D34S, SSN1EU08, SSN1EU08A, SSN1OU08, SSN1TSB4, SSN1TSB8, SSN1EU04, SSN1C34S, SSN1MU04, SSN2OU08, SSN1D12B, SSN1ETF8, SSN1EFF8, SSN1ETS8, SSN1DM12, SSN1ETF8A, SSN1ETF8A, SSR1L75S, SSR1L12S, SSN1EOD41, SSN1PETF8, SSN1CQ1, SSN1MD75, SSN1MD12, SSN1PEFF8, TNN1CO1, TNN1ETMC, TNN1AFO1, TNN1D75E, TNN1D12E, SSN1CMD2, and TNN1EFF8.
Service boards: SSN1FIB, SSN1MR2A, SSR1MR2B, SSN1MR2C, TNN1XMD2, and DCU.
Auxiliary boards: SSQ2PIU, SSN1PIU, SST1PIU, SSR2PIU, SSN1FAN, SSN1FANB, SSN1FANA, SSN1FANC, and SSN1RPWR.
Symptoms
The system control boards of a problematic NE reset unexpectedly, and the NE is unreachable to the NMS within a short time.
Identification method
Check whether the unexpected resets cause the NE being unreachable to the NMS.
Check whether the reset task is tVos1s.
Run the :errlog command, and check whether the following exception information occurs within the period during which the NE is unreachable.
No.6: 2014-8-20 7:5:57
BOARD=24 TYPE=0xf0000010 SOFTTYPE=2
# 2014-8-20 7:5:13
ExcptErr: taskname=tVos1s, pc=235970, SR=1230, FaultAddr=300, DataBuff=2dcc26c
SymBol::ResetCommTaskFun__10CCommonCmdS EIPADDR=0x2399ac, Depth=0, 7:5
SymBol::Vos1sTask__Fv EIPADDR=0x1aa4664, Depth=1, 7:5
SymBol::tskAllTaskEntry EIPADDR=0x1a69510, Depth=2, 7:5
SymBol::vxTaskEntry EIPADDR=0x1b79070, Depth=3, 7:5
SymBol::0x0 EIPADDR=0000, Depth=4, 7:5
SymBol::0x0 EIPADDR=0000, Depth=5, 7:5
[Root Cause]
Compilers of system control boards of the N4 type are defective. As a result, when a board without a CPU is removed, deregistering the callback function fails and the pointer resides. When the board is installed or removed again, the corresponding task fails occasionally, resulting in a reset.
[Impact and Risk]
NEs involved are unreachable to the NMS within a short time and cannot respond to operations in time.
[Measures and Solutions]
Recovery measures
NEs involved can automatically recover.
Workarounds
None
Preventive measures
Upgrade NEs involved to V100R008C02SPC500 or a later R008 version or V100R010C03SPC203 or a later version.
Material handling after replacement
None
[Inspector Applicable or Not]
None
[Rectification Scope and Time Requirements]
None
[Rectification Instructions]
None
[Attachment]
None
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