It's not about the uptime (time to throw away the RAGs)
All network management products miss the point. Their primary focus is on monitoring uptime. This serves no business purpose and cannot justify any return on investment. All the development is in looking at when the situation is acceptable but none when you are in dire straits. How is this monitoring? All it does is give you a comfortable feeling. With this approach there is no difference in the value proposition of 'ping' or a network management framework product worth a million bucks.
Read the article here.