Hi,
Need following info to get to root cause:
Show version
Show system reset-reason
show core
How to retrive core file can be found in the below link.
https://supportforums.cisco.com/document/102636/retrieving-core-files-cisco-nexus-switching-platforms
The close match to this would be CSCuj40011 (But for 100% match we need the core file).
HTH
Inayath
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