| OID | Object | Binding Variable | Description | Implemented Specifications | 
|---|---|---|---|---|
| 1.3.6.1.4.1.2011.5.25.42.4.2.19 | hwMstpProNewPortStateDiscarding | 
 | When a port belonging to the MSTP process enters the block state, an alarm message is generated. Reason: Changes occur on the link state and a link is removed from the network. Advice: Pay attention to the reason of change on the network topology and check if a fault occurs on the link. | This object is implemented as defined in the corresponding MIB files. |