Nagios is great, simply does the job

Pros

All you need to know about network monitoring, evolved over time and simply does what it needs to, great reporting.

Cons

Not many negative things I could think of besides not being a fully dedicated network person, this made it easy to understand, troubleshoot and find root cause.

All-in-one monitoring tool

Nagios is very flexible and the user is able to choose many dashboards from other projects, such as Thruk, Adagios and others.

Pros

Nagios is able to monitor all of your network routers, switches, Access Points and devices that support the SNMP protocol, including No-Breaks, power generators and even phone systems. For the endpoints Nagios is able to monitor all of your servers (Linux, Unix, Windows and MacOS).

Cons

There's a learning curve for the configuration of the application and the dashboards that follow it. After finishing this first piece the monitoring piece is a breeze.

Its good among some others

Pros

Easy to get started!user-friendly and we can integrate with Nagios XI just in some clicks. Thanks...

Cons

We cannot see full visibility and it can't recognize all traffic flows because of heterogeneous network topology we can not deploy it on the production environment.

Great Product with lots of features and ease of use

Pros

The dashboard looks impressive and eye catching. The software is easy to use with lots of features. The software analysis the network traffic in depth and advance user options that gives IT administrators more power.

Cons

There are lots of options in the dashboard and sometimes it is harder find what you are looking for. The customer support team sometimes unable to find a solution.

NAGIOS

great for monitoring systems such as Routers, switches, firewalls, servers and site locations

Pros

This software has so much built into it. best software you will need in your environment to monitor sites and servers

Cons

wish they made an easy to install EXE with a GUI for setup but soon you start to play with software you get the hang of it

free monitoring tool

Pros

is a good monitoring tool under free software, which helps you to keep all the resources of your network vita and mendianto constant monitoring via snmp. the fact of being an open source tool generates many advantages which you can adapt to the demands of the company

Cons

when programming and configuring this tool you can generate some errors, which can be solved as you progress in your development