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Cisco AS5800 Series Universal Gateways

Field Notice: FN - 17742 - Cisco AS5850 RSC Card Hardware Issues


Revised June 6, 2006
February 4, 2002


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 Comments HW Rev.
Part Number Rev.
AS58-RSC-2GE   800-06443-06   A0   800-06443-06 A0 or older   8.5 or older are addressed by the FN  
AS58-RSC-2GE=   800-06443-06   A0   800-06443-06 A0 or older   8.5 or older are addressed by the FN  
AS58-RSC-2GE/2   800-06443-06   A0   800-06443-06 A0 or older   8.5 or older are addressed by the FN  

Problem Description

Between October 2001 and October 2002, Cisco's VGDBU engineering team identified hardware problems in the Cisco AS5850 chassis Route Switch Controller (RSC) card. The issues discovered are summarized below:

Description Comments
TCAM Failure at Power-Up reported internally
L3 Tag SRAM Power Pins Unconnected reported internally
NVRAM Corruption reported internally
"CPU out of Range" error reported by one (1) customer
Possible Connector Misalignment Upon Card Insertion  

Background

The above problems were all identified on boards within development and in manufacturing. No customer reported problems have yet been positively identified as caused by either of the above two issues.

Problem Symptoms

Summary Description
TCAM Failure at Power-Up It is possible that, upon power-up of the AS5850, the TCAM chips on the RSC Gigabit Ethernet module will fail to initialise correctly. If this happens, the RSC should continue to respond normally to the RS232 console, but the two Gigabit Ethernet ports as well as the front panel Fast Ethernet port will not function correctly. They may be reported as "UP," but they will not pass traffic
L3 Tag SRAM Power Pins Unconnected During normal operation of the RSC, it may crash and display an error message indicating a bus error, possibly associated with a parity error of some type.
NVRAM Corruption During internal engineering stress testing, it was found that the NVRAM contents can be corrupted, causing configuration information to be lost and the RSC rendered non-bootable. This problem has not been observed under normal operating conditions.
"CPU Out of Range" Error During normal operation of the RSC, while or any time after it boots, it may crash and display the error message: "%ERR-1-GT64120 (PCI-0): Fatal error, CPU out of range error" After this crash, you may need to reload the RSC or power cycle the entire AS5850 to resume normal operation. There is no way to predict when or how often a particular RSC may experience this problem.
Possible Connector Misalignment Upon Card Insertion When cards are inserted into the AS5850 chassis, possible misalignment of the small (power) connector may result in physical damage to the card and to the backplane. The design has been improved to minimize this risk. Meanwhile, when installing new cards, always exercise appropriate caution and be sure to follow procedures outlined in your Hardware Installation Guide.

Workaround/Solution

Boards exhibiting any of the above known problems should be swapped out and returned as an RMA. To temporarily recover from either of the above problems you must either reload the RSC, or in some cases, physically power-cycle the AS5850. However, doing so is not a guarantee that the problem(s) will not reappear..

Hardware Versions

Hardware Version ECO or Deviation Improvements with Successive Revisions
6.14 D038049 Necessary but insufficient to fix "TCAM failure at Power-Up."
  E043577  
6.15 D043832 FIXES L3 power pins
  D045935 IMPROVES "CPU Out of Range" error
7.0 D028966 FIXES "TCAM failure at Power-Up."
  E052056  
8.0 E069424 FIXES "NVRAM Corruption."
8.01 E051277 Minor manufacturability improvements
8.05 E071296 FIXES "CPU Out of Range" error.
8.06 E071033 FIXES "Possible Connector Misalignment Upon Card Insertion."

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: