Field Notice: FN - 61895 - Show Controller Command Displays Inaccurate Optical Levels on 4OC48E and OC192E Line Cards

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Updated:December 16, 2005
Document ID:FN61895

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Revised December 16, 2005

November 29, 2004

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
Products Affected

GSR - 4OC48E/POS-LR-SC

GSR - 4OC48E/POS-LR-SC=

GSR - 4OC48E/POS-SR-SC

GSR - 4OC48E/POS-SR-SC=

GSR - OC192E/POS-IR-SC

GSR - OC192E/POS-IR-SC=

GSR - OC192E/POS-LR-SC

GSR - OC192E/POS-LR-SC=

GSR - OC192E/POS-SR-SC

GSR - OC192E/POS-SR-SC=

GSR - OC192E/POS-VSR

GSR - OC192E/POS-VSR=

Problem Description

For Cisco 12000 Eng4+ 4OC48E and OC192E line cards, the optical levels displayed in IOS with the show controller command are not correct.

Background

The IOCPLD image was implemented at that time to fix a timing issue, but introduced this bug. This issue has no other impact on the functionality of the card. The IOCPLD image is not field upgradeable via IOS.

You can use the show controll optics command to view the optical levels for a card slot.

For example:

LC-Slot15#sh controll optics 
Rx optical power in mWs and dBms 
Rx power = 5.00 mW, + 6.990 dBm 
Rx AC optical power in mWs and dBms 
Rx AC power = 5.00 mW, + 6.990 dBm 
Tx optical power in mWs and dBms 
Tx power = 3.97 mW, + 5.911 dBm, 500.00% to BOL(Begin of Life)
Tx laser diode forward bias current I(F) in milliamps 
Tx current = 125.000 mA

Problem Symptoms

The show controller command displays the wrong optical levels on Cisco 12000 Engine 4+ line cards.

Workaround/Solution

This is an IOS CLI display discrepancy that does not affect line card normal mode of operation. Customers can continue to use affected line cards without any impact to traffic handling.

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

CSCef93542 (registered customers only)

OC192 LC reports incorrect Rx Optical Power

CSCef04362 (registered customers only)

 optical power monitoring value are wrong on an OC48/OC192 LC

CSCeb04348 (registered customers only)

 Optical Power Monitoring value inconsistency

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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