The challenge
What needed to change
For a healthcare provider, a network disruption can affect critical services. The organization needed to understand which on-premises systems communicated with specific cloud regions, VPCs and applications before changing routes.
The approach
How the team responded
It enabled VPC Flow Logs on Cloud Interconnect VLAN attachments and used Flow Analyzer to turn source, destination, port and protocol telemetry into an actionable traffic map.
Key takeaways
Inventory real traffic patterns before changing network routes.
Use telemetry to identify the highest-risk cutover moments.
Keep the traffic map useful after migration for capacity, cost and compliance work.