| OID | Object | Binding Variable | Description | Implemented Specifications | 
|---|---|---|---|---|
| 1.3.6.1.4.1.2011.5.25.42.4.2.17 | hwMstpProRootChanged | 
 | When the root bridge status of a MSTI in a specified MSTP process changes, an alarm message is generated. The changes include: 1 indicates the the local bridge becomes a root bridge. 2 indicates the local bridge stops functioning as the root bridge. | This object is implemented as defined in the corresponding MIB files. |