Nagios is a popular system monitor that offers monitoring and alerting servers, applications, services, network devices… It’s very modular and multiplatform, because the core of nagios is the processor of the output of the plugins that can be developed in
Install and configure cacti
Is very important have a good tool to monitor our devices in a networking. Cacti do this and very well. Cacti offers graphs using rrdtool to monitor the load average, ping latency, disk space and other relevant information over SNMP