What happens if the CIDR blocks of two VPCs overlap during peering?

Question

Mahesh B · Accepted Answer

If the CIDR blocks of two VPCs overlap, the VPC peering connection cannot be established due to routing conflicts. The cloud provider cannot determine where to route traffic with overlapping IP addresses. You will receive an error and must modify the CIDR blocks to eliminate the overlap. This is essential for clear routing between the VPCs.

Santhosh Kumar · Answer

VPC peering connection will fail because of conflict in routing

What happens if the CIDR blocks of two VPCs overlap during peering?

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