Question

A network engineer manages a custom-mode VPC with a subnet named 'app-subnet' in us-central1 using primary range 10.20.0.0/24. The application team is deploying additional Compute Engine instances and has exhausted the available IP addresses. Existing VMs must keep their current IP addresses and stay online during the change. What should the engineer do to provide more usable IP addresses in this subnet?

Accepted Answer

Expand the subnet's primary IP range to a larger prefix, such as 10.20.0.0/22, using gcloud compute networks subnets expand-ip-range.

Answer

Delete and recreate 'app-subnet' with a larger CIDR block, then re-deploy the existing instances.

Answer

Add a secondary IP range to 'app-subnet' and configure the new VMs to draw primary interface IPs from the secondary range.

Answer

Create a new subnet in a different region with a larger range and migrate the workloads there.