Daily Archives: April 26, 2016

when Ring MSP Configuration Failures on SSN1SLQ16 Boards on OSN 3500 Products

Keywords:

SSN1SLQ16MSTP, OptiX OSN 3500

[Problem Description]

Trigger condition:

1. The version of an OSN 3500 NE is one of the versions listed in Versions Involved

in the preceding table.

2. The logical board is SSN1SLQ16.

3. Configuration data is downloaded from the network management system (NMS), or

ports are deleted and then added.

Symptom:

l During the configuration of the multiplex section protection (MSP), an error message

Non-pair board that is checked. Error Code: 38742” is displayed.

l A board replacement (such as replacing SSN1SLQ16 with SSN2SLQ16) fails, and the

error code is 41264.

l The downloading from the NMS to the NE is partially successful, and the error code

is 38742.

 

If this issue is triggered on the OSN 3500 NE of a version listed in Versions Involved

in the preceding table and not addressed in a timely manner, it still exists after an upgrade.

Identification method:

This issue can be identified when all the following two conditions are met:

1. The logical board is SSN1SLQ16, and the ring MSP is configured on a port of the

SSN1SLQ16 logical board. An error is reported, and the error code is 38742.

4. The OSN 3500 NE is upgraded from one of the versions listed in Versions Involved.

[Root Cause]

When the ring MSP is configured on optical ports (at the STM-16 rate or a higher rate) that

support the shared MSP, the ring MSP can be configured in non-paired slots. For an NE of

a version listed in Versions Involved, the configuration files of ports on the SSN1SLQ16

logical board are registered as not supporting the shared MSP. However, the configuration

file of the SSN1SLQ16 logical board is registered as supporting the shared MSP. As a result,

when the SSN1SLQ16 logical board is added, the automatically added ports support the

shared MSP. When the ports are deleted and then added again, port configuration files are

invoked. The newly added ports do not support the shared MSP. Therefore, when the ring

MSP is configured, the error message “Non-pair board that is checked. Error Code:

38742″ is displayed.

The logical board is added first during the downloading from the NMS, and the optical ports

are automatically added. The automatically added optical ports support the shared MSP (the

MSP can be configured in non-paired slots). Then all the optical ports are deleted, and optical

ports to be used are added using the NMS. Therefore, this issue exists on all ports of the

SSN1SLQ16 logical board after configuration data is downloaded from the NMS. If the ring

MSP is configured on a port, an error message is displayed during the downloading from the

NMS.

[Impact and Risk]

The ring MSP configuration on the SSN1SLQ16 board in a non-paired slot fails. The downloading

from the NMS to an NE configured with the ring MSP also fails, and the error code is 38742.

However, the delivery of other services on the NE is not affected.

[Measures and Solutions]

Recovery measures:

Delete and then add the logical board on an NE of a version listed in Versions Involved. The

automatically added logical ports do not have this issue. However, the preceding operations are

complex because services are carried on the live network. It is recommended to upgrade the NE

to a version in which this issue has been resolved, and then download configuration data from

the NMS.

Preventive measures:

Do not delete and then add ports for the SSN1SLQ16 logical board on an NE of a version listed

in Versions Involved. If a board provides the version replacement function, it is not

recommended to configure the SSN1SLQ16 board as the logical board.

Solution:

Upgrade NEs to V100R008C02SPC300 or later versions, or to V100R010C03SPC200 or later

versions.

 

If this issue is triggered before an upgrade, the issue still exists after the upgrade. In this case,

choose any of the following three methods to resolve the issue:

Delete and then add ports of the logical board again.

Delete and then add the logical board again.

Download configuration data from the NMS.

Material handling after replacement:

N/A

[Inspector Applicable or Not]

N/A

[Rectification Scope and Time Requirements]

N/A

[Rectification Instructions]

N/A

[Attachment]

N/A

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