Recently Oracle announced a network visualizer that makes a visual model of your Oracle virtual network. It is composed of virtual cloud networks (VCNs), subnets, gateways, and other resources. More often than not, these components are connected through a complex routing and have complicated relationships.
OCI Network Visualizer is a service that allows you to visualize the network topology to get a concise view of your tenancy. It is a free-of-cost service that can help you understand and troubleshoot the design and operation of your virtual network.
The Network Visualizer can provide you with a diagram of the topology of all VCNs in a selected region and tenancy. The tool can offer either a regional or cloud network topology.