PRTG Enterprise Monitor

the alerting is on point as it barks about everything if your not carefull

the landscape for displaying visual maps needs a lot of work.

PRTG is probably one of the easiest software packages I've ever used. It's highly customizable and easily set up. You can give a device a name and IP address, tell it to auto-discover and it will find all applicable SNMP or WMI items for that device that can be monitored. You can then go through and take things out that you don't need or care about.

There are some things that are not customizable that I wish were. For example, every time I do a device discovery on a HP switch, I get the port discovered, but also get the RMON port discovered. I do not need both of them. If I delete the RMON port and do a weekly discovery, it picks up the previously deleted RMON ports. I've contacted support about it and the only way to keep that from happening is to pause the RMON sensors so they are not discovered again. I just wish there was a way to modify the auto discovery settings to ignore things, such as the RMON ports, Windows update frequency, etc. that you don't need and don't need the auto-discovery to pick up again. Maybe if there was a list of items that auto discovery looks for and the ability to un-check the box for those items. For switches, I don't need auto discovery to pick up anything else but maybe additional ports that were plugged in since the last auto discovery.