To deploy an NC2 cluster using an existing AWS network, the NAT Gateway should be placed in a public subnet. A public subnet is one that has a route to an Internet Gateway, allowing the NAT Gateway to provide outbound internet access for resources in private subnets. The NAT Gateway is used to enable instances in private subnets to access the internet while keeping them secure by not exposing them directly to the public internet.
Nutanix Cloud Clusters (NC2) on AWS Documentation

To support Nutanix ' s native Local Key Manager (LKM) for data encryption in a cost-effective manner, a minimum of three nodes is required. This ensures that there is enough redundancy and reliability for the encryption services to function properly, complying with best practices for distributed key management.
Nutanix Support and Insights
Nutanix Cloud Clusters on AWS Administration

To correctly route traffic in a hybrid environment using Flow Virtual Networking, administrators must distinguish between internal private traffic and external internet traffic. Internal traffic usingRFC 1918address ranges (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16) should be routed to theoverlay-external-subnet-no-nat.
This ensures that traffic directed to the on-premises data center retains its original IP address for auditing and security purposes. Conversely, all other traffic (0.0.0.0/0), typically destined for the internet, should be routed to theoverlay-external-subnet-nat. This configuration allows the NAT Gateway to handle internet-bound requests while maintaining a transparent, non-NAT path for corporate internal communication.

To ensure that alert emails are sent properly from Prism Central within an NC2 environment, configuring an SMTP server in the Prism Central settings is required. The SMTP server facilitates the sending of email notifications for alerts and other communications.
* SMTP Configuration:
* Prism Central requires an SMTP server to send email alerts. This involves specifying the SMTP server address, port, and authentication details if needed.
* The configuration must include the email address from which the alerts will be sent and the recipient addresses.
* Steps to Configure SMTP Server in Prism Central:
* Log in to Prism Central.
* Navigate to the " Settings " menu.
* Select " Email Server " under the " Alerts " section.
* Enter the SMTP server details, including the server address, port, and authentication credentials.
* Test the configuration to ensure emails are sent correctly.
Nutanix Prism Central Administration Guide
Nutanix Support Documentation on Email Alert Configuration
Best Practices for Configuring SMTP Servers in Cloud Environments