When Service Interruption on 100G and 40G Boards in WDM Products

Keywords: WDM products, Transport network product line

Summary:

When the SmartKit Inspector tool is used to inspect a 100G or 40G board, it issues a command to make the

board enter the equipment state if three consecutive command execution failures are returned. As a result,

services are interrupted.

[Problem Description]

Trigger condition:

The problem occurs when the following conditions are present:

l The SmartKit Inspector whose version is V200R008C00 and its WDM script version is earlier than

20140127221342093 is used to perform a board inspection.

l During the inspection, the board module log is uploaded (the log in the module flash is copied to the board),

or the communication between the board and its module becomes abnormal (a MOD_COM_FAIL or

PORT_MODULE_OFFLINE alarm is reported).

l The board under inspection is TN54NS4, TN54NS4(REG), TN15LSXL, or TN53TSXL.

Symptom:

Services are interrupted.

Identification method:

Same to trigger condition.

[Root Cause]

When the board module log is being uploaded (the log in the module flash is copied to the board), or the

communication between the board and its module becomes abnormal, the board cannot respond to the

inspection commands. If the SmartKit Inspector does not receive command responses for three times,

it run a command to make the board enter the equipment state.

After the board enters the equipment state, The board (TN54NS4, TN54NS4(REG), TN15LSXL, or

TN53TSXL) will automatically switch the service type or clock to ensure normal equipment test

functions, causing service interruption.

[Impact and Risk]

Services are interrupted.

[Measures and Solutions]

Recovery measures:

Perform a cold reset on a faulty board.

Workarounds:

None

Preventive measures:

If SmartKit Inspector is V200R008C00 version, upgrade the WDM script to 20140127221342093 or a

later version or directly upgrade to SmartKit Inspector V200R009C00 or a later version. For details on

how to query the WDM script version, see the Attachment.

[Attachment]

Do as follows to query the tool script version:

In the sKeeper, choose Applications and click Local version for the Inspector. In the window that is

displayed, click the patch package for WDM products. The script version of the SmartKit Inspector tool

will be displayed in the Details area.

You need to upgrade the tool if the queried version is earlier than 20140127221342093.

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