A Virtual Cloud Network (VCN) is a virtual version of a traditional network—including subnets, route tables, and gateways—on which your compute instances run. Customers can bring their network topology to the cloud with VCN. Creating a VCN involves a few key aspects such as: • Allocate a private IP block for the cloud (CIDR range for the VCN). Customers can bring their own RFC1918 IP addresses. • Create Subnets by partitioning the CIDR range into smaller networks (sub networks for front end, back end, database) • Create an optional Internet Gateway to connect VCN subnet with Internet. Instances created in this subnet will have a public IP address. • Create Route table with route rules for Internet access • Create Security Group to allow relevant ports for ingress and egress access
Step 1: After you login, navigate to the networking tab and select Virtual Cloud Networks.
Step 2: Create a Cloud Network by specifying a name for your VCN and selecting the “Create VIRTUAL CLOUD NETWORK PLUS RELATED RESOURCES” option. This will create a VCN, Subnets, Routing Table, Security Groups and Internet Gateway using a 10.0.0.0/16 CIDR range. Scroll to the bottom of the screen and click “create Virtual Cloud Network” button.
Once the VCN is created, navigating to list of VCN’s, you can see the “MEAN-VCN”, which you just created in the step above.
