| OID | Object | Binding Variable | Description | Implemented Specifications | 
|---|---|---|---|---|
| 1.3.6.1.4.1.2011.5.25.42.4.2.28 | hwMstpProRootLost | 
 | This notification indicates that the bridge is no longer the root bridge. | This object is implemented as defined in the corresponding MIB files. |