Oracle Cloud Infrastructure Documentation

Plan for IP Address Space in Oracle Database@AWS

Use the information in this topic to find your IP address requirements for the Oracle Database@AWS Exadata service.

Details for Exadata Database Service

Important

Review the information on valid CIDR block ranges for the ODB Network resource in the following documentation:

Client Subnet requirements

The Client Subnet has the following IP address requirements:

  • 4 IP addresses are needed for each virtual machine. Each extra virtual machine added to a VM cluster increases the number of IP addresses needed in the Client Subnet by 4 IPs.
  • Each VM cluster requires 3 IP addresses for Single Client Access Names (SCANs), regardless of how many virtual machines are present in the VM cluster.
  • 3 IP addresses in the client subnet are reserved for the ODB network resource in AWS. Also, 3 IPs are reserved by OCI's networking service.
  • The minimum CIDR size for the client subnet is /27, and the maximum size is /16.

VM cluster scenarios: CIDR size needed for the Client Subnet

The following table shows scenarios of provisioned VM clusters of differing sizes. The number of each scenario that can fit in a Client Subnet depends on the CIDR size used by the subnet. This table doesn't show all possible scenarios.

Scenario /27 /26 /25 /24 /23 /22
1 VM cluster with 2 virtual machines (11 IPs + 6 Networking = 17) 1 3 7 15 30 60
1 VM cluster with 3 virtual machines (15 IPs + 6 Networking = 21) 1 3 6 12 24 48
1 VM cluster with 4 virtual machines (19 IPs + 6 Networking = 25) 1 2 5 10 20 40
2 VM clusters with 2 virtual machines each (22 IPs + 6 Networking = 28) 1 2 4 9 18 36
2 VM clusters with 3 virtual machines each (30 IPs + 6 Networking = 36) 1 3 7 14 28
2 VM clusters with 4 virtual machines each (38 IPs + 6 Networking = 44) 1 2 5 11 23

Backup Subnet requirements

The Backup Subnet has the following IP address requirements:

  • 3 IP addresses for each virtual machine. Each extra virtual machine added to a VM cluster increases the number of IP addresses needed in the Backup Subnet by 3 IPs.
  • Networking services require 3 IP addresses for the Backup Subnet, regardless of how many VM clusters are present in the Backup Subnet.

VM cluster scenarios: CIDR size needed for the Backup Subnet

The following table shows scenarios of provisioned VM clusters of differing sizes. The number of each scenario that can fit in a Backup Subnet depends on the CIDR size used by the subnet. This table doesn't show all possible scenarios.

Scenario /27 /26 /25 /24 /23 /22
1 VM cluster with 2 virtual machines (6 IPs + 3 Networking = 9) 3 7 14 28 56 113
1 VM cluster with 3 virtual machines (9 IPs + 3 Networking = 12) 2 5 10 21 42 85
1 VM cluster with 4 virtual machines (12 IPs + 3 Networking = 15) 2 4 8 17 34 68
2 VM clusters with 2 virtual machines each (12 IPs + 3 Networking = 15) 2 4 8 17 34 68
2 VM clusters with 3 virtual machines each (18 IPs + 3 Networking = 21) 1 3 6 12 24 48
2 VM clusters with 4 virtual machines each (24 IPs + 3 Networking = 27) 1 2 7 9 18 37