Needed to remove and replace a lan cable on my D6220 yesterday and noticed when I unplugged it and re-plugged it the CRC errors went through the roof. I am thinking there is something amiss with the router, as long as I touch nothing it has a very low error rate but wobble any lan cable and the CRCs climb. Anyone else with a D6220 see this? Should add the lan cable was not in use when removed or re-plugged.
Stuart