Field Notice: FN - 63178 - MDS Fabric and Blade Switches May Reload After 497 Days of Uptime
November 18, 2008
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.
Initial Public Release
M9100 - DS-C9124-K9
M9100 - DS-C9134-K9
MDS9000 - DS-HP-FC-K9
MDS9000 - DS-IBM-FC-K9
MDS9000 - DS-X9222I-K9
After 497 days of uptime the switch may restart due to a software defect. This problem is intermittent and may not happen every time. If the switch is running SAN-OS 3.3(2), NX-OS 4.1(1b) or above software, the switch is not vulnerable to this issue.
In order to determine if your switch is at risk, enter the
show system uptime command to identify how long the switch has been up.
MDS-9124# show system uptime
System start time: Sat Sep 20 14:50:31 2008
System uptime: 6 days, 22 hours, 25 minutes, 15 seconds
Kernel uptime: 6 days, 22 hours, 26 minutes, 18 seconds
Active supervisor uptime: 6 days, 22 hours, 25 minutes, 15 seconds
show logging onboard command will identify the card uptime. In this example it is just over 497 days.
Thu Sep 25 19:09:33 2008: Card Uptime Record
Uptime: 42946218, 497 days 1 hour(s) 30 minute(s) 18 second(s)
Reset Reason: Unknown (0) Card Mode..........................: Runtime
This problem is resolved in SAN-OS 3.3(2) and NX-OS 4.1(1b).
The data field for the switch uptime has a maximum of 497 days before it will roll over to zero. If the process that handles the roll over takes more than ten seconds, the switch will restart.
The switch may restart due to a failure of the system to respond quickly enough when the uptime counter reaches 497 days.
By scheduling a planned restart of the switch or upgrading to either SAN-OS 3.3(2) or NX-OS 4.1(1b) it is possible to avoid this issue. In addition, if a switch was upgraded to any prior version of SAN OS, the system uptime would have been reset to zero.
To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.
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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