I just work help desk for a rather large enterprise. Anyway I had a call today that an a user that seemed rather knowledgeable was receiving an fcs error on a switch that she accessed using putty. I normally just do proxy troubleshooting so i didn’t know what an fcs error was. But the technician group I forwarded this ticket said they could ping both switches. But the user said the network was so slow it wasn’t useable.Anyway my questions is after reading about fcs errors, Could this be caused by a duplex mismatch or a bad port. And how would the technician still be able to ping both switches assuming one switch is down stream?
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