Live Migration, No Disruption: How Nokia Modernized Brownfield Data Centers

January 29, 2026

Ahmed Abutaleb explains how Nokia IT executed complex brownfield migrations—from two different non-Nokia vendor environments—into a common, modern architecture built on Nokia SR Linux with Nokia Event-Driven Automation (EDA), and did so with no visible downtime for application teams. 

Key tactics: 

• Network-as-code with a full SDLC (Git branches, tests, controlled merges) so intent stays as real code and is continuously verified against what’s deployed. 

• A true digital twin (supported in EDA) that runs the same code and control plane as production and ingests the exact same intent/configs. This let the team model migrations, run “what-if” scenarios, validate every node/port/VLAN, and avoid building massive physical labs. 

Two migration patterns: 

• Live interconnect of legacy data centers to the SR Linux environment, then server-by-server moves on shared subnets so apps keep talking without disruption. 

• One-shot management-platform swap (repointing every node in a maintenance window) executed safely thanks to twin-driven prechecks and automation. 

• Change management and culture: initial resistance from CLI-centric engineers gave way as the digital-twin approach proved safer and faster. 

• Outcomes include cloud-like, consistent operations on-prem, verified intent with drift detection, safer changes, and about an 80% ticket reduction. 

This video is number 5 in a series of 6. To see the other posts, visit: https://techstrong.tv/videos/modernizing-the-data-center-nokia-its-netops-playbook