Modern network infrastructure management requires a multi-layered approach to testing to prevent outages caused by configuration changes or software updates. Relying solely on manual testing or monitoring often fails to detect issues before they impact critical business services.
The proposed methodology utilizes three distinct tools: physical laboratories, emulation, and simulation. Physical labs provide high-fidelity validation for specific hardware and firmware. Emulation, such as the uInfraTwin solution, allows for safe testing of configuration changes and user scenarios in a virtualized environment.
Simulation tools build mathematical models of the network to monitor actual state, traffic paths, and policy compliance across large-scale infrastructures. Control plane simulators like Batfish and Juniper WANDL assess configuration impacts, while data plane simulators like Hadal and Forward Networks analyze current traffic flows.
A digital twin integrates these components into a unified lifecycle. This process begins with network archaeology to map the actual state of the infrastructure, followed by pre-production testing of releases, and continuous post-deployment monitoring to detect configuration drift and ensure service availability.
