Hello
There is RouterBOARD 951G-2HnD.
In wireshark always see this:
345 3.189794000 Routerbo_cc:b9:ff Spanning-tree-(for-bridges)_00 STP 60 RST. Root = 32768/0/d4:ca:6d:cc:b9:ff Cost = 0 Port = 0x8005
To mikrotik connected 3 Switch: DES 3810-28, DES 1210-52 * 2 (switches connected together in trunk, mikrotik connected with 1210-52). Switch off at STP
Where does STP?
If it is possible, answer me in russian, please