PracticeLabs
Switching & VLANs

VLAN Campus Visualizer

ACME Corporation campus — see how VLAN membership follows switch-port configuration, not physical location. The CEO sits beside Sales but belongs to Management VLAN 10 with the data-center server. Explore broadcasts, 802.1Q tags, and inter-VLAN routing through SVIs.

core-sw1::core-dist-acore-sw1::core-dist-bdist-a::dist-acc1dist-a::dist-acc2dist-b::distb-acc3dist-b::distb-acc4CORE-SW1Corecore-sw1DIST-AHeadquartersdist-aDIST-BEngineering & DCdist-bACC-1HQ Floor 1acc-1S-PC130S-PC230F-PC120CS-PC50ACC-2Executive Flooracc-2CEO10EA-PC20CONF30ACC-3Engineeringacc-3R140R240R-SRV40NET99ACC-4Data Centeracc-4M-SRV10F-SRV20S-SRV30CS-SRV50MON99
Configuration sandbox

VLAN essentials

  • A VLAN is a Layer 2 broadcast domain — membership follows switch-port configuration.
  • Access ports carry one VLAN; traffic is normally untagged.
  • Trunks carry multiple VLANs; non-native VLANs use 802.1Q tags.
  • Inter-VLAN routing requires a Layer 3 device (here, SVIs on CORE-SW1).
  • Broadcasts flood inside a VLAN only — they are not routed between VLANs.

Related: VLANs & broadcast domains lesson · 802.1Q trunks lesson · CDP / LLDP tool