The Logical Topology view is similar to the Physical Topology view, but it shows the network interfaces, logical or physical, that are used to connect devices in the Security Fabric.
To see the Logical Topology, in FortiManager GUI, select Fabric View > Logical Topology.
The Logical Topology view displays your network as a bubble chart of network connection endpoints. These devices are grouped based on the upstream device interface they are connected to. The bubbles appear smaller or larger, based on their traffic volume. You can double-click any bubble to re-size it. FortiGate devices and other networking devices are depicted as boxes.
You can hover over the icon for each FortiGate to see information, such as serial number, hostname, and firmware version. You can also see each FortiGate interface that has upstream and downstream devices connected to it. You can hover over the name of an interface to see its IP address, network (subnet), and role.
Security Fabric Rating recommendations are also shown in the topology, beside the icon of the device the recommendations apply to.