Intermediate LevelCloud Computing (AWS/GCP/Azure)
How does Inter-Region Transit Gateway Peering connect global VPC networks?
❓ Interview Prompt: Explain Inter-Region Transit Gateway (TGW) Peering, global AWS backbone routing, and encrypted inter-region transit.
Connecting VPC networks spread across multiple AWS global regions (e.g. 'us-east-1' and 'eu-west-1') used to require complex mesh VPN setups. Inter-Region Transit Gateway Peering simplifies global routing.
Architectural Advantages:
1
Global AWS Backbone: Traffic between peered Transit Gateways travels over AWS's private global fiber network, bypassing the public internet completely.
2
Encrypted Transport: All inter-region TGW peering traffic is automatically encrypted at the hardware level.
3
Consolidated Routing: Simplifies multi-region VPC routing into clean Transit Gateway route tables.
Code Implementation Example
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# Inter-Region Transit Gateway Peering Attachment
resource "aws_ec2_transit_gateway_peering_attachment" "us_to_eu" {
peer_account_id = aws_ec2_transit_gateway.eu.owner_id
peer_region = "eu-west-1"
peer_transit_gateway_id = aws_ec2_transit_gateway.eu.id
transit_gateway_id = aws_ec2_transit_gateway.us.id
}💡Terraform Inter-Region Transit Gateway Peering attachment between US and EU.
🎯 Interview Key Takeaway
Inter-Region TGW Peering connects global VPC networks over AWS's private encrypted global backbone.
#Transit Gateway#TGW Peering#Inter-Region#Networking#Intermediate
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