What are Error Correction Code (ECC) errors?

ECC errors indicate faulty memory on a specific hardware component.

ECC errors on the Routing Engine (RE):

ECC errors on the Compact Forwarding Engine Board (CFEB):

ECC errors on the Flexible PIC Concentrator (FPC) in slot 2, as reported by the System Control Board (SCB):

There is Dynamic Random Access Memory (DRAM) on the RE, in addition to Synchronous Dynamic Random Access Memory (SDRAM) on various PFE components. All of this memory uses ECC, which allows for the detection (and sometimes correction) of bit errors.

ECC errors can be either correctable or uncorrectable. Any hardware that logs an ECC error should be replaced, unless they occur infrequently.

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