you have configured the relevant options within the ‘Details’ tab, you can
click on the ‘Passive Checks’ tab:
This window contains just two options:
Cascaded From: Designates an active check that is responsible for submitting passive results into your new passive Service Check. This ensures that when a recheck is performed, the correct active check runs for your passive check.
For example, the Interface, Errors and
Discards Service Checks will be defined as passive checks, where the results
will be provided by the Interface Polling Service Check which runs the
If this field is set, then when a service is
rechecked, the correct active service will be run.
Alert from Failure: You can define how many passive failures are
received before an alert is raised. This is similar to how maximum check
attempts is defined.
recommend you use a value of 1 if you have passive results coming from another
system (such as log alerts). If you are using cascade checks, then you may want
this value to be higher so you are only alerted after multiple failures.
Once the passive check and its options
have been configured, it can be applied to one or more Hosts. See “Section 22.214.171.124. Service Checks Tab” for guides on how to add the newly created Service Check
to a Host.