Good day yesterday there was a problem at one of mikrotika interfaces. Internet stops working , and access from the outside of this resource in the logs periodically pours warning ether2 fcs error on link, mikrotik rebooted , upgraded to the latest firmware , the cable on this port was replaced by helping literally 5-10 minutes then begins again blunt . Prompt where to dig ? Thank you in advance.
RX or TX?? if RX problem most likely is on opposite side of the wire on in the wire itself
We solved the problem with the service provider switch rebooted it and it worked.