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Topology

L3 Logical

How your network is logically segmented by subnet.

The L3 Logical perspective shows where every host appears in your network's IP address space. Subnets are containers, and each host is shown inside every subnet it has an address on. When a host has addresses on multiple subnets, it bridges them — making it visible at a glance which devices route, span, or otherwise touch multiple network segments.

This is the default perspective and the most general-purpose view of your network.

What you see

  • Containers: Subnets — one per discovered network segment
  • Nodes: Each host's presence in each subnet it has an address on
  • Connections: Links between subnets where a single host has addresses on both, plus dependency overlays when configured with port-level detail

What drives it

The L3 view is built from your discovered subnets and the IP addresses found on each host's interfaces. No manual setup is required — it appears as soon as discovery runs. Dependencies configured with port-level detail surface as overlay connections on top of the structural layout.

Containers

Container hosts (Docker, Podman) attach their containers to one or more bridge networks, and each bridge network is a subnet on this view. A container that joins several bridges appears in each of those subnets, so you can see everywhere it's attached rather than in just one place.

Two overlays make container structure legible:

  • Container Runtime connects each bridge subnet back to its host, showing which host runs the containers on that bridge.
  • Same Container links the addresses of a single container that spans multiple bridge subnets, so a multi-attached container reads as one thing rather than as unrelated cards in separate subnet boxes. It's hidden by default — toggle it on when you need it.

The Container Bridges grouping rule collapses a host's bridge subnets into a single group when they'd otherwise clutter the view. See Customizing Views for grouping rules and edge overlays.

When to use it

  • General-purpose situational awareness of the network
  • Spotting which devices bridge multiple segments (routers, firewalls, multi-homed servers)
  • Auditing which hosts live on which subnet

See also: Hosts & Subnets, Customizing Views.

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