How many ping performed Network Performance Monitor to determine that a team this fallen??
I'm not certian I understand the question but this is how NPM determines if a node is down.
Node is pinged in a regular ping cycle. If the node dos not respond, NPM sets the node status to warning and starts a fast ping cycle for that node. NPM fast pings the device for the time set in the Setting interface as Node Warning Level. This is 120 seconds by default. If the node fails to reply during this time the status is set to down and the node returns to the regular ping cycle. The exact number of pings during this time will vary.
