@markmcn, thanks for detail info, seems that we have this problem too
Does Mikrotik Support provided additional info or any deadlines about this problem?
Can we get some extra info about this fix? Symptoms etc.*) switch - fixed disabling of MAC learning on CRS1xx/CRS2xx;
This reply was about CPU as i understand.Like I said, CSS3xx has a new Marvell DX chip. Completely different system and different feature set.