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Cisco Bug: CSCvt52398 - SUP Kernel panic - not syncing: FPGA watchdog

Last Modified

Jun 10, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

The SUP on a modular chassis may reboot due to kernel crash due to Machine Check Error (MCE) with the following messages in kernel dmesg logs.

    <0>[2456655.159470] MACHINE CHECK ERROR 
    <0>[2456655.159478] MACHINE CHECK ERROR

This can happen if CPU memory sub-system or DIMM module might have reporting multiple bits of error.
There is no specific trigger or condition for this very rare to happen issue.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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