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What's the best practice for designing a resilient VPC in a multi-region architecture?
Asked on Feb 04, 2026
Answer
Designing a resilient VPC in a multi-region architecture involves implementing redundancy, failover, and secure connectivity across regions to ensure high availability and disaster recovery. This aligns with the Well-Architected Framework's focus on reliability and operational excellence.
Example Concept: A resilient VPC design in a multi-region architecture typically includes deploying VPCs in multiple regions with peering connections or transit gateways for inter-region communication. Each VPC should have multiple subnets across different availability zones to ensure redundancy. Use services like AWS Direct Connect or VPN for secure and reliable connectivity between on-premises networks and cloud resources. Implement automated failover mechanisms using Route 53 for DNS routing and health checks to redirect traffic in case of regional failures.
Additional Comment:
- Ensure that each region has its own set of resources to avoid single points of failure.
- Consider using Infrastructure as Code (IaC) tools like Terraform to manage VPC configurations consistently across regions.
- Implement security best practices, such as network ACLs and security groups, to protect resources in each VPC.
- Regularly test failover and disaster recovery procedures to ensure they work as expected.
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