As an working with ISP we have a large network for monitoring of such big network we used Nagios it makes our work load little bit easy by giving critical alert of devices and network flow.Interface is just great it makes us easy to understand and maintain our network infrastructure.It helps us to know bandwidth utilization and traffic flow in our network.

Nagios is provide complete monitoring solution.We are using it to monitor our end to end connectivity.It is easy to monitor end to end fiber connectivity using it.When our any fiber path goes down Nagios highlights its by red color and also gives alert.

*We used Nagios XI for Fiber ring monitoring for the last 4 years. Basically we have large fiber network which is deployed on different cities in Maharashtra, India and our overall traffic is manipulate over this fiber only so Its very important to maintain our fiber with minimum downtime. *For using Nagios XI we are monitor and maintained this fiber ring topology with end to end monitoring server performance and highly effective with limitless scalability. *And also we can plan for proactive monitoring and awareness.its give automated and integrated capacity planning graphs, as per our observation we can easily change or replace our circuit without taking downtimes. Nagios priorly provides all this important information to us so we can easily maintain changes in network. *Some other features provided like great GUI interfaces, easy to use, highly customize, Advanced graph monitoring, etc. *Overall Nagios Xi is excellent monitoring tools that are doing monitoring practically and give us a great output and helps to solve problems issue in network priority.