I'm guessing by the OID that these are probably stacked N-series switches? As mentioned in the provided link, some of the OIDs are for triggering of traps only and can't be polled, but it also seems to indicate that a trap (if successfully sent) shows the problematic member. https://www.dell.com/community/Networking-General/Monitor-N2000-Stack-Status/td-p/4661086 In cases where the master fails, the backup should take over and provide, at minimum, a trap showing a backup switch has become the new master. Hope this helps.