VPC Create
To create a VPC, configure the VPC CIDR block (192.168.0.0/16 in this example). In the subnet configuration, create a public network subnet for Oracle RAC (192.168.0.0/24 in this example).
Continue to create a private network subnet for Oracle RAC (192.168.100.0/24 in the example).
Click Next, confirm that the information is correct, check I have read, and click Create Now.
Creating Virtual IP
Enter the public network subnet you created.
Apply for a virtual IP address in the public service subnet.
The virtual IP address you applied for can float between bound instances.
In this example, the VIP address of cluster node 1 is created as 192.168.0.41.
Create the VIP address of node 2 in the same way as 192.168.0.42
Create a SCAN IP address that provides services as 192.168.0.50.
Multicast
The private network of Oracle RAC requires the multicast function. Therefore, you must configure the multicast function for a VPC. You can make the multicast configuration in Network Console > Multicast. When configuring a multicast domain, set Multicast Domain Source to Intra-cloud, select the VPC created in the previous step, set Member Join Method to Dynamically Join, and select IGMPv2 and IGMPv3 as protocol versions, as shown in the following example:
Security Group
The default security group enables only port 22 and the ping service. TCP and UDP packets cannot communicate normally in cluster nodes in the subnet. Therefore, you must configure an independent security group to allow network communications within the subnet. (You must configure a new security group oracle-rac-sg and apply it to NICs on public and private networks.)