VPC Peering

Posted on Posted in AWS

Credits to http://aclo

What is VPC  Peering?

  •  Connection between two VPCs (single or with other AWS Account) within a single region.
  • This is done via private IP address.
  • Technology used is existing infrastructure of VPC, it is neither a gateway or a VPN connection.

Example  VPC Peering:

Transitive Peering NOT Supported – VPC A cannot access VPC C via VPC B

If VPC B is change to this cidr block as above, it breaks the connection as there is overlapping internal address range (CIDR block).


  • no overlapping CIDR blocks
  • no peering connections
  • cannot be on different regions

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