VLAN Access Port: Wrong VLAN
VLAN faults are often one incorrect access-port assignment. This lab makes the physical link healthy so the switchport state is where the diagnosis lives.
The problem
A workstation is connected and has link, but it receives an address from the guest VLAN instead of the engineering VLAN because its switchport is assigned to the wrong access VLAN.
What you'll practice
- Read access-port VLAN assignment
- Differentiate access and trunk roles
- Validate VLAN membership
- Verify endpoint reachability
The topology
Two access switches carry Engineering and Guest VLANs over a trunk; one endpoint port is intentionally placed in the wrong VLAN.
Commands to run yourself
The real diagnostic commands for this lab, copy-paste ready. Run these in the same order to reproduce the investigation on your own session.
show interfaces Ethernet1/0 switchportshow vlan briefshow interfaces trunkTopology diagram
Frequently asked
Is this aligned to CCNA practice?
Yes. It focuses on configuration, verification, and troubleshooting skills covered by the CCNA-level technology domain named on this lab.
Ready to run this lab yourself?
No setup, no image sourcing. Book a session or ask for a live demo.