Are overlapping IP addresses allowed when configuring VCN Peering in OCI?

Overlapping IP addresses are not permitted when configuring VCN (Virtual Cloud Network) peering in Oracle Cloud Infrastructure (OCI). This restriction is in place to maintain a clear and distinct routing within the networks involved. When two networks utilize overlapping address spaces, it creates ambiguity in routing, making it challenging for the system to identify the correct destination for traffic between the peered VCNs.

Without this clarity, packets destined for a specific IP address could potentially end up in the wrong network, leading to miscommunication, data corruption, or even security vulnerabilities. Therefore, for effective network routing and management, OCI enforces a requirement that the IP address ranges of peered networks must be unique and non-overlapping.

This policy ensures reliable network configurations and helps to avoid complications that could arise from address conflicts, thereby enhancing overall network stability and performance in a multicloud environment.