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.