As part of a larger complex, is a small office building with 4 computers. It has a single cat5 run to a non-managed switch that has 4 computers connected to it.
Since I can't ping the switch, the only way I can tell if that network is up is by pinging the computers. But the ladies in that office tend to turn the computers off on holidays, weekend, when they fell like it, etc. 99% of the time, at least 1 computer is on.
What I want to do is have Nagios send a notification only if all 4 computers go missing. Aka, the switch died or a FSB (fiber seeking backhoe) had some fun in the area. I don't think Nagios host check dependencies will do this from what I have been reading.
Any other way to do this?