Is this possible using Advanced Alerts? I'd rather not tie the alert to a volume, interface or service.
I've been thinking about this problem for some time now.
I've created a Report Writer report which shows interfaces & volumes in an unknown state, in an effort to identify the nodes where SNMP has broken.
Perhaps a better way would be to create a daily report based on uptime.
Filter it on any SNMP node where the uptime has not incremented in the past 24 hours (excluding down nodes).
Most likely this would have to be done with the custom SQL function.
It may be difficult to make into an alert, as the uptime counters will not update if you have some missed SNMP polls, leading to false positive alerts.
This can happen when the DB, Network or polled device gets too busy.
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