Automating CIDR expansion: Reducing IP exhaustion downtime

Learn how to build a serverless automation that monitors VPC IP utilization and expands CIDR capacity within minutes. This solution uses AWS Lambda, Step Functions, and IPAM to detect IP exhaustion risk and add secondary CIDRs with new subnets automatically. Three operating modes support environments with full IPAM management, IPAM for subnets only, or no IPAM at all.