Notifications for errors on specific interface

Hello CheckMK Community!

We are still in our infancy setting up CheckMK fully. We recently had a capacity issue on one of our devices interfaces that caused an outage for some of our customers. Looking back at our monitoring we can see errors were happening on the interfaces before the capacity was exceeded. We want to create a notification to pop any time there are errors on this interface and any interface like it so we can potentially avoid this issue in the future.

So far I have been unable to find anything in CheckMK for the error portions of these interfaces. I feel like I have overlooked something simple, but it would put my mind at ease to reach out for help so we can ensure this never happens again!

For every or some interface you can create a rule “Network interfaces and switch ports”.
Inside this rule you find the option for errors on the interface.


As you see it is possible to define absolute and percentage levels.

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