Video: Create a network diagram - Visio - supportce Create a detailed network diagram in Visio linked to external data Whether you're planning a simple network or documenting a complex one, a template will give you a head start. To find network diagram templates, go to File , select New , and choose the Network category. What is a Logical Network Diagram? | DCIM, Network If your network is tiny, you may be able to create a logical network diagram by hand — or creating Visio network diagrams. If your network doesn’t fit in a shoebox, however, you will probably want to use some kind of automated network mapping software (such as netTerrain) .