Got a MT (PC) that routes several subnets, everything is fine. Decided to make a wifi hotspot with RB751U, plugged it to one of our switches (to eth2) and it started recieving all traffic packets (2-7 mb/s) from the main MT router to its eth2 interface! It wasn't even configured with any routes, default gateway, etc! Looks like tha main one sends "traffic flow" but it's turned off. What's going on? Both routers have ROS 5.18. Proofscreen is attached.

Any ideas??

there is a loop in your network. Enable RSTP on bridge interface.

who's that 10.111.1.40? all traffic goes to that host

*.1.40 is our local server and it has lots of connections from other subnets, it's ok. And what is not ok is that i see all these connections on mikrotik that works just as an access point.

My central MT router (PC) has only two interfaces - WAN and LAN, so there were no configured bridge on it. I added a new bridge and put a single port on it - eth2, then ebabled rstp. The AP allready has bridge with enabled rstp. This didn't help, traffic still goes through the AP ((