Design and Implementation of Internet Failover with Automated Email Notification for Network Continuity

Rapid developments in telecommunications have increased the need for reliable and efficient communications networks. With the shift in information exchange from physical documents to digital formats, computer networks connected to the internet play a crucial role in sharing resources. In Indonesia, with internet penetration reaching 79.5% in 2024, internet network stability is very important. Disruptions to the network, such as bad weather or hardware failure, require failover solutions to maintain connection continuity. This research discusses the implementation of the failover method on Mikrotik routers to maintain a stable internet connection. Through IP configuration, DHCP Server, DNS, and firewall, the system can prioritize the primary path and provide a backup path. Monitoring is done with Netwatch for fast detection of intrusions, while mangle and firewall rules support automatic data traffic redirection. An automatic notification system via email, integrated with Mikrotik and Netwatch email servers, provides real-time information about connectivity status. Evaluation of network quality using the TIPHON method shows very good performance with throughput of 1,039,143.50 bps, packet loss of 0.77%, delay of 12.88 ms, and jitter of 0.00004 ms. These results show that the failover and notification system implemented is effective in maintaining network speed, stability and consistency.