%BCM-4-ECC_L2CACHE: Corrected ECC from L2 cache
This message indicates a soft-parity error from the Layer 2 cache has been detected and
corrected.
Normal system operation should continue. These errors occur when an energy
level within the chip (for example, a one or a zero) changes, most often due to cosmic
radiation or Electromagnetic Induction (EMI).
When referenced by the CPU, such errors cause the system to either crash (if the error is
in an area that is not recoverable) or they recover other systems (for example, a CyBus
complex restarts if the error was in the
packet memory (MEMD)).
In case of a soft parity error, there is no need to swap the board
or any of the components.
Studies have shown that soft parity errors are 10 to 100 times more frequent than hard
parity errors. Therefore, Cisco highly recommends you to wait for a second parity error
before you replace anything. This greatly reduces the impact on your network.
The best option would be to monitor the router for next 24Hrs. If this error repeats
immensely in such a way that it impacts the network or crashes the router then you can go
for hardware replacement (NPE and it's memory).
Otherwise if things remains fine for 24hrs. Then we can consider it to be a SEU (single
event upset).
Hope it helps!
Regards,
Juan
