Hello,
For 8300 series an excessive CRC errors fault is reported when the number of ingress crc-error frames per 10,000 received frames exceeds the configured threshold value in a 20 second interval (did not find information about 6300 series)
Have you tested another interface to see if that changes anything?
I would recommend to open TAC case and try to figure out why 291 errors?!?! (and update if you/tac finds root cause)
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Jori Luoto
AV-IT Specialist
Audico Systems oy
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