When creating user VM subnets for multiple NC2 clusters in AWS, the best approach is to create guest-VM subnets for each cluster. This ensures that each cluster has its own dedicated subnets, which simplifies network management and avoids potential IP conflicts.
Advantages of Dedicated Subnets:
Isolation: Each cluster operates in its own subnet, providing better isolation and security.
Management: Easier to manage and troubleshoot network issues when each cluster has its own subnets.
Scalability: More scalable as each subnet can be managed and expanded independently.
Steps to Create Guest-VM Subnets:
Identify the IP range for each subnet.
In the AWS VPC console, create a new subnet for each cluster using the identified IP ranges.
Associate the new subnets with the respective clusters during or after the cluster deployment process.
Why Not Shared Subnets:
Shared subnets could lead to IP conflicts and make network management more complex, especially as the number of clusters grows.
Reference:
Nutanix Cloud Clusters on AWS Administration Guide
AWS VPC Subnet Creation Documentation