Failover

The plan stopped one layer too soon, right where it mattered most.

Failback hides the same mistake, just running in reverse.

Production comes back, but the recovery environment is holding changes the primary never saw, and getting those home usually means re-protecting the workload and reversing replication before the final cutover happens.

Failover gets rehearsed because everyone plans for the disaster.

Failback gets skipped because everyone’s already decided the disaster is over, which is exactly when the details that matter go unchecked.

Then the network has to follow.

Getting the application stack right doesn’t mean anything if nobody can reach it, and that’s usually where DNS quietly gets blamed for a bigger problem.