We are monitoring DHCP scopes and on one of our DC's, it frequently crosses failure threshold. Is there a way to suppress the alert to only alert us every X hours? I'm finding it difficult since it alerts every time it goes into failure (which is about every 15 minutes).
Any idea how I can combat this without adjusting thresholds for this DC only?
What template, and which component within the template are you referring to? It sounds like you are either using the "DHCP User Experience Monitor" template, or the "Windows DHCP Server" template. We'll also need to know which component is causing the notifications and if they're hard failures (down), or if the thresholds that are being crossed (warning/critical) that's causing the alerts to trigger.
Sorry, should have been more specific.
We are using the Windows DHCP Server template and the Server Scope Almost Full component. It keeps crossing thresholds.
The "Warning: Server Scope is Almost Full" is triggered off of an event message generated by the Windows DHCP server into the Windows Event Log. This is not based upon a threshold. However, SAM 6.0 (Currently in Beta) does allow you to define thresholds for Event Log Messages. In fact you can choose whether the alert severity should match the event severity, or if the status should change based on the number of occurrences of the event within the polling interval.
For now through, if this is really an annoyance you can disable this component by editing the application. You will still receive alerts if the DHCP scope is completely exhausted of available IP addresses from the "Error: Server Scope is Full" event.
You can also change the default alerting threshold in Windows server (from 80%)
To do so follow these steps:
Navigate to this path
Create a REG_DWORD (32 bit) value named DhcpAlertPercentage under Parameters
set it to 85 or 90 (decimal)
Lastly, restart the DHCP service for the change to become active.
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