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Cisco Catalyst 4900 Series Switches

Field Notice: FN - 63128 - Laser of X2-10GB-SR May Remain Off on ME-4924-10GE and WS-C4948-10GE After Reload - Replace X2-10GB-SR Using Upgrade Program

Revised July 3, 2008
June 12, 2008

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.

Revision History

Revision Date Comment
1.1
03-JUL-2008
Revised steps in the How to Identify Hardware Levels section.
1.0
12-JUN-2008
Initial Public Release

Products Affected

Products Affected
X2-10GB-SR

Problem Description

On ME-4924-10GE and WS-C4948-10GE switches, the laser transmitter of a subset of X2-10GB-SR modules may remain off after a software crash or when the reload command is invoked. This is due to a firmware bug in the X2 modules. This problem is exposed only on two switches, the ME-4924-10GE and the WS-C4948-10GE.

This problem does not occur on any other platforms or switches.

Background

The affected X2 modules are from one particular vendor. The root cause of the problem is a minor firmware bug in the affected X2 modules that activates the module's laser eye safety mechanism. This safety mechanism shuts off the transmitter laser if the module's reset pin is held high for more than 5 seconds. ME-4924-10GEs and WS-C4948-10GEs hold the X2 modules in reset more than 5 seconds when a reload command is invoked or after the switch recovers from a software crash. This problem does not occur when the aforementioned switches are power-cycled.

Problem Symptoms

After a software crash or when the reload command is invoked on the identified switches, the transmitter of the affected X2 modules remains off and does not turn back on, causing the link to stay down. Issuing shutdown and no shutdown commands on the port will not bring the link back up. The link will not come up without manual intervention as described in the Workaround/Solution section.

After the switch comes back online, messages similar to the following will be displayed on the console:

*May 5 09:06:15.267 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/49, changed state to down
*May 5 09:06:15.267 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/50, changed state to down

Workaround/Solution

Workaround:
The affected X2 modules will recover after the module is removed and re-inserted or when the switch is power cycled.

Solution:
The permanent solution for this problem is to replace the affected X2 modules used on ME-4924-10GE and WS-C4948-10GE switches. Use the Upgrade Form attached to this Field Notice to order replacements.

How To Identify Hardware Levels

This problem is seen only with modules deployed in ME-4924-10GE and WS-C4948-10GE switches.

Step 1: Is the module's serial number between FNS1042xxxx to FNS1138xxxx inclusive? If not, the module is not affected. If yes, continue to step 2.

Step 2: If you have physical access to the module, is the module's Cisco Part Number 10-2205-02 ?
Or
If you do not have physical access to the module, is the Vendor Part Number "FTLX8541E2-CS" and Vendor Revision letter "D" according to the show inventory output ?

If you answered "yes" in steps 1 and 2, the module is affected and should be replaced.

Below is a picture of a X2-10GB-SR which is not affected because its serial number is outside the affected range:

Below is an example of a show inventory output to identify the Serial Number of the X2-10GB-SR, which is in bold format:

Switch#sh inv
NAME: "Switch System", DESCR: "Cisco Systems, Inc. WS-C4948-10GE 1 slot switch "
PID: , VID: , SN:

NAME: "Linecard(slot 1)", DESCR: "10/100/1000BaseT (RJ45), 10GE (X2) Supervisor with 48 10/100/1000BaseT ports an"
PID: WS-C4948-10GE , VID: V06, SN: FOX10480BWL

NAME: "TenGigabitEthernet1/49", DESCR: "10Gbase-SR"
PID: FTLX8541E2-CS , VID: D , SN: FNS111510FR

NAME: "TenGigabitEthernet1/50", DESCR: "10Gbase-SR"
PID: FTLX8541E2-CS , VID: D , SN: FNS11151103

NAME: "Power Supply 1", DESCR: "Power Supply ( AC 300W )"
PID: PWR-C49-300AC , VID: , SN: PAC11010LF9

Upgrade Program

X2-10GB-SR
If you want to check status on a previously booked upgrade, please refer to the Status Tool (Please note: you must have a sales order number in addition to a CCO User ID and Password to access this site):http://tools.cisco.com/qtc/status/tool/action/LoadOrderQueryScreen

For questions about an upgrade order already submitted, please send an email with your order number in the subject line to:upgrades-support@cisco.com
You will receive a response within 24 hours Monday-Friday not including US Holidays.


Note: Fields marked with an asterisk (*) are required fields.

Requestor Information
*Name
*E-mail Address
TAC SR Number
Customer Shipping Information
*Company
*Address
Address_line2
*City
*State/Province
*ZIP/Postal Code
Country
Product
Product *Quantity *Serial# 2
X2-10GB-SR
Customer Contact Information
*First Name
*Last Name
*Phone 1 Ext.
Fax 1 Ext.
*E-Mail
Please use the following format: user@domain.com
*Upgrade Order Reference Number
Please provide a number that you can use when inquiring about order status
Notes
1 For phone and fax, include 011 and the country code outside North America.

2 When entering more than one serial number in the serial number text entry field, be sure to type a comma between each serial number to separate them.

3 For customers in Japan only *** please enter the building and the floor in the address field. Also, enter the contact person's name, the telephone number and the e-mail address in the appropriate fields..

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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