I have a group of nodes that reboot every night. The alert "alert me when a node goes down/up" is turned on. I don't want to turn that alert off, because there are plenty of other nodes in our network I would want to know about going down immediately. What can I do to customize the alert that it only tells me about those particular nodes going down/up at night if they stay down for over 30 minutes, WITHOUT changing the alert process for the other nodes?
