ISR 1921 crashing saying "Possible software fault"

[Tiziana Cassar]

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

[paolo bevilacqua]

Update IOS before spedning further time.

[Ivan Shirshin]

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

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