How does VPC peering work, and what are its limitations?

Question

NAVEEN KUMAR J · Accepted Answer

VPC Peering enables private communication between two VPCs using AWS's internal network. After creating and accepting a peering connection, route tables and security rules must be updated to allow traffic. The main limitations are the lack of transitive routing, inability to peer VPCs with overlapping CIDR blocks, scalability challenges in large environments, and the need to manage routes separately in each VPC.

NAVEEN KUMAR J · Answer

VPC Peering is a networking connection between two VPCs that enables private communication using their private IP addresses.Traffic stays on the AWS backbone network and does not traverse the public internetlimitations of VPC Peering:No transitive routingNo overlapping CIDR blocksDifficult to manage at large scaleNo centralized route managementCross-region data transfer costs may apply

How does VPC peering work, and what are its limitations?

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