I run OpenNMS currently, and the one problem I have is it's very peculiar -- one might say academic -- terminology and structure. It's not a point-and-click interface, despite being web-based. Instead, you must wrangle with pollers and responders and notifiers. Eventually I got my head around it, but it's still pretty painful to use.

I run a mix of Cactus, Intermapper, and PRTG, with PRTG a very nice commercial product that offers a free version supporting up to 100 sensors.

-mel

From: NANOG <nanog-bounces@nanog.org> on behalf of Daniel Lacey <daniel.p.lacey@gmail.com>
Sent: Wednesday, August 15, 2018 10:04:59 AM
To: nanog@nanog.org
Subject: Re: What NMS do you use and why?

Take a look at opennms.org
Scales very well. Lots of API hooks for integration with other data
sources and applications.
It is open source and they offer paid support services, one-time (e.g.
setup and training) or on-going support contracts.

On 8/15/18 7:49 AM, Colton Conor wrote:
> We are looking for a new network monitoring system. Since there are so
> many operators on this list, I would like to know which NMS do you use
> and why? Is there one that you really like, and others that you hate?
>
> For free options (opensouce), LibreNMS and NetXMS come highly
> recommended by many wireless ISPs on low budgets. However, I am not
> sure the commercial options available nor their price points.
>
>