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When SNMP/WMI polling stops (when Node is on ICMP/SNMP or ICMP/WMI polling), it generally does not send a notification. The symptom you will notice is that the statistics on the Nodes e.g. CPU, Memory, etc. stop populating. If there are interfaces monitored, they will become unknown. But in some cases, there might not be interfaces available.
Use the following query:
SELECT Nodes.NodeID, Nodes.Caption FROM Nodes WHERE DATEDIFF(s, Nodes.LastSystemUpTimePollUtc,GETUTCDATE())>300 and status =1
LastSystemUpTimePollUtcwith the last System Up Time each poll.
Suggested tags : NPM, Alert, SNMP, WMI
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