It seems the problem was master port.
I did reset both device. then reconfigure masterport and tag vlan.
everything is fine. it remains only to configure filters.
I found a topic - http://forum.mikrotik.com/viewtopic.php ... ilit=me909There are plenty of posts on these forums about the ME909u mPCIe modem - have a search.
You'll need to put the SIM onto the RouterBoard.