Currently, we get alerts when the clock-period is adjusted for a router or switch via ntp servers. To us, this doesn't count as something we want to be alerted on. We'd like to exclude these types of changes from triggering alerts. As jmespath doesn't appear to have the ability to replace data incoming from the inspector, I don't believe a custom metric will work here. Rather, I think we would need an additional path added to the Cisco IOS inspecter , maybe clone the existing RunningConfig path (call it something like RunningConfigExcludesNTPClockPeriod). I believe the IOS command below would exclude those changes prior to ingestion by LionGard, to limit the amount of customization that would need to be done on the inspector side.show running-config | exclude clock-period