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Cisco Bug: CSCte39296 - MDS 9500 kernel reboot counter misleading when no actual reboot occured

Last Modified

Feb 22, 2014

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

3.2(3a) 3.3(2)

Description (partial)

Symptom:

switch A
version 3.2(2c) , Hardware  cisco MDS 9513 ("Supervisor/Fabric-2")

 kernel uptime is 1 days 7 hours 25 minute(s) 52 second(s)

  Last reset 
    Reason: Unknown
    System version: 3.2(3a)
    Service:

`show system reset-reason`
----- reset reason for Supervisor-module 7 (from Supervisor in slot 7) ---
1) No time
    Reason: Unknown
    Service: 
    Version: 3.2(3a)


`show system uptime`
System start time:          Thu Aug 31 10:07:02 2006   
System uptime:              1208 days, 9 hours, 2 minutes, 40 seconds >>> switch actually is running since 1208 days
Kernel uptime:              1 days, 7 hours, 27 minutes, 17 seconds >>> however 'kernel uptime' counter seems to have rolled over>>
Active supervisor uptime:   498 days, 9 hours, 53 minutes, 27 seconds

497*1 +1 =498


switch B

version 3.1(1) Hardware   cisco MDS 9513 ("Supervisor/Fabric-2")

sadubcorfab001   kernel uptime is 7 days 1 hours 6 minute(s) 54 second(s)

  Last reset 
    Reason: Unknown
    System version: 3.1(1)
    Service:

`show system reset-reason`
----- reset reason for Supervisor-module 7 (from Supervisor in slot 7) ---
1) No time
    Reason: Unknown
    Service: 
    Version: 3.1(1)



System start time:          Fri Mar 23 13:51:29 2007
System uptime:              1001 days, 6 hours, 9 minutes, 6 seconds
Kernel uptime:              7 days, 1 hours, 14 minutes, 47 seconds
Active supervisor uptime:   1001 days, 6 hours, 9 minutes, 6 seconds


497*2=994 + 7 = 1001



Conditions:

Kernel reset counter after 497 days , despite the fact switch did not actually reboot.
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