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Optimal VPC Subnetting: High Availability, Security, & Seamless On-Prem Connectivity
- Most cloud networks in enterprises require efficient IP allocation and management for high availability, security, and on-premise connectivity.
- Subnet segmentation within a VPC is essential for balancing security, scalability, and operational efficiency.
- Considerations for VPC subnet segmentation include security requirements, high availability design, IP address management, scalability, and management complexity.
- Advantages of subnet segmentation include granular security controls, resource isolation, robust defense, least privilege access, and simplified auditing.
- Efficient routable CIDR usage is promoted through segmentation to reduce reliance on limited IPAM routable addresses.
- Primary and secondary CIDR ranges play roles in optimal VPC design by accommodating workloads and providing additional IP space respectively.
- Challenges of VPC subnet segmentation include careful planning, reconfiguration difficulties, IP address limitations, and route table management overhead.
- Mitigation strategies involve planning for growth, using IP address management solutions, documenting CIDR allocations, and evaluating operational overhead.
- Clear subnet segmentation enhances security and operational benefits, offering a maintainable and scalable foundation for different resource types.
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