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Cisco Bug: CSCvu63730 - SDWAN 20.3/17.3 - Router reboots with Kernel core when traffic is running over cellular

Last Modified

Aug 29, 2020

Products (1)

  • Cisco XE SD-WAN Routers

Known Affected Releases

17.3 17.3.1

Description (partial)

A Cisco ISR1K SDWAN router may continuously reset with kernel panics. The symptoms may show a last reload reason of CpuCatastrophicError and there would be kernel core files written to bootflash:/core/ directory. 

This may appear as a boot loop and thus temporarily halting traffic over the cellular interface or shutting down those interface(s) may potentially cease the crashes until data can be gathered for triage.

This is seen in SDWAN routers with a control channel up on cellular interfaces and traffic forwarded over the cellular interface.
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