In this article, monitoring three network devices was discussed, including setting up a simple network configuration and using New Relic to monitor them. The author assumes that readers are familiar with Linux and Docker setup, and provides detailed instructions on how to set up the network devices and configure EIGRP routing protocol. The author also guides readers through the process of installing the New Relic virtual machine, setting up the agent, and configuring SNMP for monitoring. Once the setup is complete, readers can monitor their network devices using New Relic's dashboard, which provides high-level information about CPU, RAM, and individual interface stats, as well as other screens and dashboards depending on the device configuration.