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Cisco 6900 Series Multiplexers

Field Notice: Cisco 6920 RateMux PowerPC Card Hangs


Revised July 22, 2003

June 16, 2000


Products Affected

Product

TAN

TAN Rev

BAL

BAL Rev

Comments

HW Rev

C6920-PWRPC

800-07121-01

-A0

73-4967-01

-A0

ASY, ELMECH, RATEMUX, POWER PC, POPC

N/A

C6920-PWRPC

800-07121-01

-B0

73-4967-01

-A0

ASY, ELMECH, RATEMUX, POWER PC, POPC

N/A

Problem Description

Cisco has discovered that the Cisco 6920 RateMux PowerPC card occasionally hangs, requiring manual intervention to recover. The 6920 RateMux continues to process MPEG video streams, but you can't provision service or monitor the unit.

Background

This problem effects PowerPC cards manufactured prior to June 5, 2000.

The problem is caused by signal cross-talk on the memory address latch lines. This causes the PowerPC card to access random locations in memory with unpredictable results.

Problem Symptoms

When the Power PC card encounters this problem, you will not be able to connect to the ethernet port to manage or provision the 6920RATEMUX. You must reset the Power PC Card in order to restore connectivity. MPEG video streams will still be processed by the DSP cards.

Workaround/Solution

There are two resolutions to this problem. Either of these solutions alone is sufficient to resolve the problem.

  1. Install a version of PowerPC card software with the fix for DDTS CSCdr50016 (registered customers only) . This software fix changes the timing when the address lines are sampled, thereby avoiding the initial signal cross-talk that causes the problem.

  2. Replace the PowerPC card by creating a return materials authorization (RMA).

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

CSCdr50016 (registered customers only)

Could not connect with browser to 40 out of 100 Power PC Cards

How To Identify Hardware Levels

You must remove the PowerPC card from the chassis in order to check the hardware part number.

Product

Problem Part Number

Fixed Part Number

C6920-PWRPC

800-07121-01

800-07121-02

Units with a deviation sticker "D00-6856" on the PowerPC card have the fix for this problem as well.

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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