Stop Reusing the Same CIDR Everywhere: VPC Peering Will Bite You Overlapping CIDRs block VPC peering and make growth painful. Here’s a practical plan for org-wide CIDR design, Terraform guardrails, and zero-downtime migration. Andrew Ghobrial Aug 12, 2025 2 min read AWSVPCCIDRPeeringTerraformTransit GatewayDevOps