BRIDGE-MIB describes information about bridges, such as bridge status and path cost for you to query and set and attributes of bridge ports and transparent bridge ports for you to query. Through this MIB, you can modify priorities of ports and attributes of specified bridges and ports.
The OID of root objects is:
iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).dot1dBridge(17)