VPC peering

Somtimes you may need to have several VPCs for different environments, and it may be necessary to connect these to each other.

For Example:

  • Production Web VPC

  • Content VPC

  • Intranet VPC

Key characteristics:

  • Allows to connect 1 VPC with another via a direct network route using private IP addresses.

  • Instances behave as if they were on the same private network

  • You can peer VPCs with other AWS accounts.

  • Peering is a start configuration (e.g., 1 central VPC peer with 4 others). No transitive peering!

  • You can peer between regions.

  • We cannot have overlapping CIDR address ranges.

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