Physical and logical boundaries in one diagram
A branch-office topology nesting physical containers (a site holding an MDF rack) and logical overlays (a DMZ security zone and a CIDR subnet) — solid borders for physical, dashed tinted borders for logical — so the same devices read correctly in both the cabling and the addressing views.
For the network architect
Real network documentation has to answer two different questions at once: where is this box physically (which building, which rack) and what address space / security zone is it in. Schematex draws both kinds of grouping and distinguishes them visually.
Physical containers are solid. site and rack blocks get solid borders — the HQ building holds an MDF rack holding the firewall and core switch.
Logical overlays are dashed and tinted. zone (the DMZ) and subnet (the 10.0.10.0/24 LAN) get dashed, tinted borders — they group by policy and addressing, not by location. The engine validates that u1's ip: 10.0.10.50 actually falls inside the subnet's CIDR.
Tiers still band the layout. tier: edge|core|access keeps the hierarchical top-to-bottom ordering even inside the boundaries, so the diagram reads as a proper three-tier design.