CRC Error

alehal · ‎03-10-2023

Hello

One of our switches ports is showing Very high proportion of CRC errors on port 49. Weird part is on main screen for switches there is no items marked for Alert or showing as Offline. No users are indicating any issues with wireless at least so far. What would cause this from happening. Do you think replacing cable and cleaning port might help in this type of issue

aleabrahao · ‎03-10-2023

CRC error means Layer 1 issue, check the cables.

I am not a Cisco employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

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kjettlun · ‎03-10-2023

I love CRC errors, mostly just kidding. But before Meraki I worked for a test equipment company. CRC errors as has been stated are almost always a cable issue. If you are using fiber instead of copper, then the probability of a bad cable increases greatly.

To test if the issue is a cable or a port if possible, move the connection to a different switch port and see if the problem follows the port. If the issue follows the port then it's a cable issue. If the problem remains on the single port then you have a bad port.

Let me know if you have any questions.

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