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Cisco 7300 Series Routers

Field Notice:NSE-100 Unexpected Failure


December 15, 2003


Products Affected

Product

Top Assembly

Printed Circuit Assembly

Comments

HW Rev.

Part Number

Rev.

Part Number

Rev.

7300-NSE-100=

68-1002-02 and 68-1002-03

All

BB=Baseboard: Daughter Card=DC - BB: 73-5198-02 all revs - BB: 73-5198-03 all revs - DC: 73-5673-03 all revs - DC: 73-5673-04 all revs - DC: 73-5673-05 all revs

All

The assemblies mentioned as affected are only possibly affected if they contain the faulty component (oscillator) from the specific manufacturer. All other manufacturers of the oscillator will not cause any of the symptoms described below.

< 5.0

Problem Description

A problem has been identified with some of the original shipments of 7300-NSE-100's that may cause the router to fail. The problem is limited to 7300-NSE-100's with only top assembly numbers (TAN) 68-1002-02 and 68-1002-03. These assemblies only potentially contain a component that was only used on these revisions of the board. Not all of these assemblies contain the faulty component (oscillator) from the specific manufacturer.

Background

The unexpected behavior is caused by a component (oscillator) not generating the right output clock. The oscillator is used in two different locations on the 7300-NSE-100 board, on the base board and the daughter card. The failure rate is about ten percent of the Customer Install Base with TAN 68-1002-02 and 68-1002-03. The reported failures have been random.

Note:?The component (oscillator) in question is located on the Base Board at U55 and on the Daughter Card at U37. The component will be marked with MF.

Problem Symptoms

The following are the reported Failure symptoms:

Symptoms seen when the component failure occurs on the daughter card

  1. The router may fail (crash) during normal operation and unable to recover.

  2. After power up, the system does not boot to rommon mode.

  3. After power up, the console displays some random meaningless characters on the console.

  4. After power up, nothing is seen on the console.

Symptoms seen when the component failure occurs on the main board

  1. The router may fail (crash) during normal operation and unable to recover.

  2. System crashes to rommon while booting IOS with Mistral errors.

  3. System crashes to rommon while booting IOS with FPGA incompatibility errors.

  4. Sample error messages is: MISTRAL_IO_BUS_INT_MASK_LO: 27.

Workaround/Solution

Workaround: No workaround.

Solution: If the TAN matches the part number identified in the Products Affected section above, create a return materials authorization (RMA) for the NSE-100 board.

Note:?All Service Depot units have the TAN 68-1002-05 or newer. The default memory of the NSE-100= has been upgraded to 512MB.

How To Identify Hardware Levels

7304>show diag
Slot 0/1:
NSE Card state: Primary
Insertion time: 16w4d ago
C7300 NSE Mainboard EEPROM:
Hardware Revision : 2.3
PCB Serial Number : CAB0532JYYB
Part Number : 73-5198-02
Board Revision : A0
Fab Version : 02
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Deviation Number : 0-0
Product Number : 7300-NSE-100
Top Assy. Part Number : 68-1002-02
Manufacturing Test Data : 00 00 00 00 00 00 00 00
Field Diagnostics Data : 00 00 00 00 00 00 00 00
Calibration Data : Minimum: 0 dBmV, Maximum: 0 dBmV
Calibration values :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 02 8B 41 02 03 C1 8B 43 41 42 30 35 33
0x10: 32 4A 59 59 42 82 49 14 4E 02 42 41 30 02 02 03
--More--   

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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