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ISR 1921 crashing saying "Possible software fault"

Hi,

I have an ISR 1921.  Every now and then, it crashes saying "Possible software fault".  The system LED flashes amber and only a hard reset (power on/off) will reload the ISR.

Attached is the crash dump.  Anyone ever encountered such a problem?

Thanks,

Tiziana

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Hall of Fame Master

ISR 1921 crashing saying "Possible software fault"

Update IOS before spedning further time.

Cisco Employee

ISR 1921 crashing saying "Possible software fault"

Hi Tiziana,

Crashinfo shows "Interrupt exception, CPU signal 20". This means a parity issue in the router DRAM  - data checksum is not correct.

Such issues are always HW and could be caused transient (soft parity - external influence, e.g. electric discharge) or persistent (hard parity - memory chip failure).

I recommend to monitor and if the same issue is seen again, replace memory.

Kind Regards,
Ivan Shirshin

**Please grade this post if you find it useful.

Kind Regards, Ivan Shirshin **Please grade this post if you find it useful.
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