I wonder if there is any way to monitor 2 devices, and get one notification only if both go down.
I have a lot of redundant devices on my network, and i need to be notified, day or night, if they are down, but only if they are both down.
I don't want to be disturbed in the middle of the night if only one is down, it can wait until next morning to be solved.
But if the malfunction affects both devices... well... I really have to solve it.