CCNA Inter-VLAN Routing: Two Clients Across a Router
Free sample lab
Deploy, verify, and troubleshoot inter-VLAN routing with two user VLANs split across two access switches, connected via a central router. This realistic topology illustrates trunk misconfiguration, VLAN assignment, and end-to-end reachability for troubleshooting.
Learning objectives
- Configure access and trunk ports on Layer 2 switches.
- Create and assign VLANs for different user segments.
- Configure routed interfaces on a router for VLAN gateways.
- Verify and troubleshoot trunk allow-list and VLAN transport issues.
- Restore inter-VLAN connectivity between endpoints.
Troubleshooting focus
- Trunk allow-list drift resulting in missing VLAN transport.
- Native VLAN mismatches between switches.
- Host assigned to wrong access VLAN.
- Troubleshooting end-to-end connectivity between user segments.
Topology preview
- 1 · Download
- 2 · Build in CML
- 3 · Upload
- 4 · Grade
Nothing graded yet.
How grading works
What each of the four steps involves, and what you get back.
Download a real Cisco lab, build it in Cisco Modeling Labs, then grade your work against the answer key — exactly how every daily lab works.
The download is a ready-to-import CML package: task list, topology diagram, starter config. Import imports/lab-work.yaml, configure the devices to meet the objectives in guides/lab-guide.pdf, then export the finished lab from CML and upload it below. You get a pass/fail for each requirement, and the node-by-node answer key unlocks the moment you submit.
Grade your work
How this lab is graded
- Build it your way. Where a lab lets you choose a value — a VLAN name, an interface description — grading checks that you configured it, not which name you picked. Names that another line has to reference, like an ACL applied with
access-class, are stated in the guide and do have to match. - Addresses, modes and protocol keywords are exact. An IP address, a subnet mask,
switchport mode trunk, an encapsulation — these carry the meaning of the lab, so they are graded as written in the guide. - Grading reads your saved configuration. Export the lab from CML after you have configured it, and make sure anything you set is in the running-config — a change that only exists in a terminal session never reaches the grader.
- You can submit as many times as you like. Your best score stands, and each attempt tells you which checks passed so you can work the gaps.
- Scored something you believe is correct? Use Report an issue on this page — that is exactly how the grading fixes in the changelog got found.
Create a free account to submit your lab for grading.
Create a free accountThat's every lab — graded on your own config.
The sample is one lab. A subscription unlocks every lab while it's active — a fresh graded lab every day, the whole daily back catalogue, and every bundle and study-path lab.