A VPC-Peering is a networking connection between two VPCs in the same or in different AWS-Accounts that enables you to route traffic between them using private IPv4 addresses or IPv6 addresses. Instances in either VPC can communicate with each other as if they are within the same network. The VPCs can be in different regions (also known as an inter-region VPC peering connection). AWS uses the existing infrastructure of a VPC to create a VPC peering connection; it is neither a gateway nor a VPN connection, and does not rely on a separate piece of physical hardware. There is no single point of failure for communication or a bandwidth bottleneck.
