Every so often… Mikrotik produces something they just can’t fix.
Complaints about that switch have been IGNORED by Mikrotik for about 3 years now.
I am pretty sure what ever the issue is it directly relates to the 48 port units. The 24 port units don’t seem to have the same issues. So I have been FORCED to Use Multiple 24 ports connected with a DAC cable.
My preferred switch vendor has been out of product for over 2 years at this point and I had really hoped my ROUTER COMPANY could make a switch. I was wrong.
http://forum.mikrotik.com/t/crs354-48p-4s-2q-traffic-problem-on-ports-1-to-8/139024/1