The cards say the network will work: how to control changes using a digital twin

This article, based on a presentation by UserGate and Hadal Project experts at Saint HighLoad++, addresses the challenges of change management in complex network infrastructure. The authors discuss the risks associated with software updates, where even vetted releases can lead to failures, such as the disruption of IPsec tunnels. The core concept is the creation of a 'digital twin' of the network, integrating physical labs, emulation, and simulation. This approach allows engineers to validate changes in an isolated environment before deployment, minimizing the risk of incidents. Using digital twins helps shift from intuitive network management to reliable control, ensuring infrastructure predictability and preventing emergency overnight repairs. The authors emphasize the importance of a comprehensive testing strategy so that businesses can rely on technical solutions rather than guesswork.