Field Notice: FN - 62823 - ONS-XC-10G-S1 XFP Y Cable Protection Does Not Work Properly With a Specific Brand of XFP

June 14, 2007

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.

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Products Affected

Products Affected	Top Assembly Part Number	Comments	Hardware Revision
ONS-XC-10G-S1	10-2012-01	Excelight Only -01	New revision is 10-2012-02
ONS-XC-10G-S1=	10-2012-01	Excelight Only -01	New revision is 10-2012-02

Problem Description

The ONS-XC-10G-S1 XFPs used on the MSTP 10GE TXPs with a part number of 10-2012-01 and a serial number starting with ECL shows an anomalous behavior in Y-cable configuration.

Background

Testing has shown the device 10-2012-01 with a Serial Number starting with the letters ECL failed the switch test on a Y-cable configuration, exceeding the allowed switching time.

This issue only impacts the 15454 MSTP TXP when used in a Y-cable protection configuration. These disruptions were seen/detected by way of control plane protocols (Layer 3- BGP specifically) losing neighbor relationships and reporting a problem via SYSLOG and SNMP.

Problem Symptoms

The total time of intervention of the Y cable protection should be in the order of 50 milliseconds.

The parts affected are unable to allow meeting this specification.

Workaround/Solution

Cisco offers to replace the defective parts on failure if they are being used in a Y-cable environment.

In this case, the customer is invited to return the defective (ECL) 10-2012-01 XFP's for replacement.

Cisco will replace the components with a compliant version of the 10-2012-01 or the new Part Number 10-2012-02 version of the part. (Both ECL and OTN serial numbers are good).

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
CSCsi68876 (registered customers only)	Title: Y-Cable protection problem with ONS-XC-10G-S1 XFP

How To Identify Hardware Levels

The XFP can be identified by the "ECL" that is at the beginning of the serial number on the body of the XFP.

The other vendor's XFP (ONT) is not affected.

Revision History

Revision	Date	Comment
1.0	14-JUN-2007	Initial Public Release

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:

• Open a service request on Cisco.com
• By email
• By telephone

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