A única maneira de se conectar a todos os três AWS VPC
seria criar um VPN
para cada um deles.
VPC Peering
não suporta roteamento de ponta a ponta por meio de um gateway ou conexão privada.
If either VPC in a peering relationship has one of the following connections, you cannot extend the peering relationship to that connection:
- A VPN connection or an AWS Direct Connect connection to a corporate network
- An internet connection through an internet gateway
- An internet connection in a private subnet through a NAT device
- A VPC endpoint to an AWS service; for example, an endpoint to Amazon S3.
- (IPv6) A ClassicLink connection. You can enable IPv4 communication between a linked EC2-Classic instance and instances in a VPC on the other side of a VPC peering connection. However, IPv6 is not supported in EC2-Classic, so you cannot extend this connection for IPv6 communication.
For example, if VPC A and VPC B are peered, and VPC A has any of these connections, then instances in VPC B cannot use the connection to access resources on the other side of the connection. Similarly, resources on the other side of a connection cannot use the connection to access VPC B.
VPC Peering
também não suporta pares transientes. Você conseguiu isso criando um VPC Peer entre todos os três nós.
Mais detalhes aqui: link