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Cisco ONS 15500 Series

Field Notice: Title: Cisco Field Notice: FN - 62045 - 15540-CPU - Temperature Sensor May Lockup Due to a Component Bad Lot - Upgrade Program


Revised February 09, 2007

January 25, 2006


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.

Products Affected

Product Top Assembly Printed Circuit Assembly Comments
15540-CPU 800-15708-01 800-15708-02 800-15708-03 800-15708-04 800-15708-05 800-15708-06 800-15708-07 All All All 800-15708-08 and later are not impacted by this issue

Problem Description

The 15540-CPU utilizes temperature sensors to measure the 15540 system temperature at the air inlet and the air outlet. In some cases these sensors may lock up resulting in incorrect temperature values being reported to the system. If this condition is present, temperature sensor based Minor, Major and Critical alarms may not function properly.

Background

This issue was caused due to a vendor component issue present in earlier versions of the temperature sensor. All products produced beginning in March 2005 are known to be free from this issue. Products produced prior to March 2005 may be affected by this issue if an affected temperature sensor was used.

Problem Symptoms

Differences between the temperature readings of the Active and Standby CPU's or large differences between the temperature readings of the Inlet and Outlet sensors on the same CPU can be indicative of this issue. To determine if the issue is present, customers should perform the screening steps outlined in the How to Identify Hardware Levels section below to determine if they may be impacted.

Workaround/Solution

It may be possible to recover a stuck temperature sensor by removing and reinserting the 15540-CPU or power-cycling the chassis. If this issue is present and you have validated the failure is related to the temperature sensor version, please request an upgrade using the Upgrade Program below.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.

DDTS Description
CSCin87211(registered customers only)
Temperature sensor on CPU may Lockup

How To Identify Hardware Levels

To determine the manufacturing date of the 15540-CPU you will need to execute the following commands from the terminal for each 15540-CPU loaded in the system. ONS15540#show hardware linecard 6
---------------------------------------------
Slot Number : 6/*
Controller Type : 0x1000
On-Board Description : Queens_CPU_PHASE_0
Orderable Product Number: N/A
Board Part Number : 73-5621-06
Board Revision : 06
Serial Number : CAB0524j15V
Manufacturing Date : 07/03/2001 <=====Unit requires additional screening
Hardware Version : 6.2
RMA Number : 0x00
RMA Failure Code : 0x00
Functional Image Version: 1.27
Function-ID : 0
----------------------------------------------------


If the product was manufactured prior to March 1, 2005, you will need to run the show environment command from a system running IOS 12.2(30)S or later to obtain the temperature sensor version "A" or "B" for each CPU in the system.

Note: All "A" version temperature sensors are prone to locking and should be returned for replacement using the Upgrade Form below. All "B" version temperature sensors are known to be free of this issue.

 

Revision History

Revision Date Comment
1.1
09-FEB-2007
Removed the Umpire Program.
1.0
01-JAN-2006
Initial Public Release.

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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