For database engineers stepping into cloud migrations for the first time, networking is the silent troublemaker. Most tutorials skip straight to configuring connection profiles, but if the network underneath isn’t right, DMS will fail in ways that feel cryptic and random.
This guide uses the OSI model as a practical debugging framework — not as abstract theory — to help you pinpoint exactly where an Oracle to Cloud SQL PostgreSQL migration is breaking down, layer by layer.
From VPC routing gaps at Layer 3 to SSL certificate mismatches at Layer 6, you’ll learn how to read DMS error