I had situation with 6.38 on my CRS I have CRS-1009 router and CRS-125-24G switch. Both of them was ROS 6.37. I upgraded both to 6.38. I am using Port based VLAN tagging described in http://wiki.mikrotik.com/wiki/Manual:Interface/VLAN / example #1 on my CRS-125-24 After 6.38 and all IP traffic stop...