Field Notice: uBR10k Using PRE1 with Newer Bridge Chip Can Fail During Bootup with Certain IOS Releases

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Updated:August 25, 2004

Document ID:FN61809

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August 24, 2004

Products Affected

Product	Comments
UBR10K - ESR-PRE-1 with TAN 800-17437-08 A0	ESR-PRE-1 used on the ESR-10k platform are not affected. ESR-PRE-1 versions lower than 800-17437-08 A0 are not affected.

Problem Description

Newer versions of PRE-1 that have a new Texas Instruments bridge chip in the Active or Standby slots may crash immediately after booting the ubr10k.

The following error message will be returned:

%ERR-1-GT64120 (PCI-1): Fatal error, PCI retry counter expired GT=0xB4000000,
 cause=0x00001000, mask=0x00D01D00, real_cause=0x00001000 bus_err_high=0x00000000,
 bus_err_low=0x00000000, addr_decode_err=0x00000470.

Releases affected:

12.2(15)BC1a/b/c/d

12.2(15)BC2a/b/c

Currently none of the released 12.0 or 12.2 ESR-10K PRE1 images have been found to exhibit the problem demonstrated on the uBR10K.

Background

ESR-PRE-1 contains a PCI bridge chip that reached end-of-life (EOL). The EOL part was replaced with a new part that was to be "form/fit/function" compatible. The new part has a deeper write-FIFO-buffer which increased write latency and can cause a PCI retry counter expired with subsequent reads with certain IOS images. The solution was to increase the PCI retry count in IOS to allow sufficient time for the previous write to complete and to differ the images that do not have the fix.

Problem Symptoms

A uBR10k crashes with the following error code:

%ERR-1-GT64120 (PCI-1): Fatal error, PCI retry counter expired GT=0xB4000000,
 cause=0x00001000, mask=0x00D01D00, real_cause=0x00001000 bus_err_high=0x00000000,
 bus_err_low=0x00000000, addr_decode_err=0x00000470.

Workaround/Solution

Solution:

Upgrade to an IOS release that has the fix for the TI chip issue.

These IOS releases will have software fixes for the issue:

IOS to 12.2(15)BC1e or higher

IOS to 12.2(15)BC2d or higher

Other Considerations

Cisco has consciously planned not to purge GPS service depots for this field notice. The impact will be small and the Cable MSO target customer is an early adopter of the most recent IOS releases. The BU is expected to actively pursue customers with this information. The field notice has been made external for high customer visibility.

DDTS

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

DDTS	Description
CSCef44517 (registered customers only)	PRE-1 with latest rev PCI bridge chip crashes on bootup

How To Identify Hardware Levels

All ESR-PRE-1 having a Top Assembly Number (TAN) of 800-17437-08 A0 or higher have the new TI Bridge chip and are susceptible to the problem.

The TAN label is on the underside of the ESR-PRE-1 carrier.

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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