Field Notice: FN - 72079 - Limited Number of NCS2K-EDRA Units Show Incorrect Laser Temp Degraded Alarm - Workaround Provided

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Updated:February 17, 2021
Document ID:FN72079

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Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision Publish Date Comments
1.0
10-Feb-21
Initial Release

Products Affected

Affected Product ID Comments
NCS2K-EDRA1-26C=
NCS2K-EDRA1-35C=
NCS2K-EDRA2-35C=
NCS2K-EDRA2-26C=

Defect Information

Defect ID Headline
CSCvw83994 Newly installed EDRA-1-35 reported LASERTEMP-DEG alarm incorrectly

Problem Description

A limited number of NCS2K-EDRA units, listed in the Products Affected section, might report an incorrect LASERTEMP-DEG alarm during turn-up/installation.

Background

A limited number of Erbium Doped Raman Amplifier (EDRA) units might display this incorrect alarm due to a misconfiguration during manufacturing of the temperature degrade threshold value in the firmware of one of the product components. However, there is no functional impact in terms of laser/traffic functionality.

Problem Symptom

The impacted units will raise the LASERTEMP-DEG alarm after the first installation. An example of the error message is shown here:

Workaround/Solution

In the short term, customers can proceed with turn-up/installation as there is no traffic impact due to the LASERTEMP-DEG.

If the unit raises a laser temperature failure alarm, also known as an EQPT FAIL alarm, then this could be considered a reliable indicator of a real laser temperature degradation issue. Contact the Technical Assistance Center (TAC) for troubleshooting and guidance.

A software fix will be added in a future release. Customers are advised to check Cisco bug ID CSCvw83994 for details of the software release.

How To Identify Affected Products

The unit serial number thats starts with IFBxxxxxxxx might display this alarm. The serial number can be found on the bottom of the unit as shown in this image:

Also, if the unit is already installed and shows the problem symptom, the serial number of the unit can be found in Cisco Transport Controller (CTC).

Open CTC. Choose Node view > Inventory panel.

Look for the shelf slot of the EDRA unit and the Serial #  column in order to identify the unit serial number.

An example is shown in this image:

Serial Number Validation

This field notice provides the ability to determine if the serial number(s) of a device is impacted by this issue. In order to verify your serial number(s), enter it in the Serial Number Validation Tool.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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