I'm new to Network and Monitoring side and I've to work on either OpenNMS or Nagios.
I want to know what are the main differences of these two Systems apart from being OpenSource and Licensed. Which one is better and why? (from installation, configuration, management, usability, reliability, features, advantages, disadvantages point of view).
Edit: Also please tell me if there is any other system which is better or equal to above systems.
my requirements are basic monitoring of my nodes. I need to see what nodes are up and down and what services each node has.