Tools->Options->Monitoring->Physical Segments
You can configure and enable physical segments monitoring in the Physical Segments window.
Alternatively, open the Physical Segments view from the Network Atlas and click Enable Physical Segments Monitoring link.
Physical Segments Configuration Wizard
This wizard helps you in building the physical segments topology, processing of forwarding tables. It also provides additional analysis methods, such as: Spanning Tree Protocol (STP) and Cisco Discovery Protocol (CDP).
In the wizard you can add other Layer 2 devices and edit the default physical segments layout characteristics to fit your needs.
