My company uses Nagios running on a *nix server to monitor various critical resources at our 39 wan sites. I am the new Nagios administrator (extra duty) and I am wondering if any of you use it for network monitoring. If so, here is my question:


We primarly use the check_ping on all devices and check_dns on our DC's. Are there any other checks that you find useful to you, or necessary for proper monitoring?


If you recommended something are there any traffic considerations associated with the check. (we're somewhat limited on WAN bandwidth)


We do use some specialized checks for certain servers, but I'm concerned more with network-wide useful checks.


I have no specific requirements, I have no specific services that I want to monitor, I just want to know (from experince) if maybe I'm missing out on some useful feature of the program that would help me out a little.


Thanks in advance... I may be new, but I like the cohesion and professionalism here.