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What are the best practices for designing a multi-region VPC architecture?
Asked on Dec 12, 2025
Answer
Designing a multi-region VPC architecture involves ensuring high availability, fault tolerance, and low latency by distributing resources across multiple geographic locations. This approach aligns with the Well-Architected Framework's principles of reliability and performance efficiency.
Example Concept: A multi-region VPC architecture typically involves creating separate VPCs in each region, connected via inter-region VPC peering or AWS Transit Gateway. This setup allows for isolated yet interconnected environments, leveraging services like Route 53 for DNS failover and AWS Global Accelerator for improved latency. Ensure consistent security policies and IAM roles across regions to maintain a unified security posture.
Additional Comment:
- Use AWS CloudFormation or Terraform to automate the deployment of VPCs and associated resources across regions.
- Implement cross-region replication for critical data using services like Amazon S3 or RDS Multi-AZ deployments.
- Monitor and log activities using AWS CloudTrail and CloudWatch to maintain observability across regions.
- Consider cost implications of data transfer between regions and optimize accordingly.
- Regularly test failover and disaster recovery plans to ensure resilience.
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