Online network simulator
Practice network CLI, troubleshoot connections and test supported network behavior in an online simulator. Start with a topology. Learn without a hardware rack.
R1# show ip interface brief
Interface IP-Address Status Protocol GigabitEthernet0/0 192.168.10.1 up up GigabitEthernet0/1 10.0.0.1 up up
Marketplace labs and courses live in the portal Knowledgebase.
Guided course
Bring four routers into Area 0, tune point-to-point links, and verify neighbors, routes and authentication.
Sign in to start. Your plan and course access apply.
Preview in KnowledgebasePractice lab
Investigate a wrong application key, a disabled radio path, blocked backhaul traffic and an expired downlink.
Sign-in and an eligible Enterprise plan for IoT are required.
Preview in KnowledgebaseSelected public listings checked . These content packs were listed at no charge; platform access is separate. Check the portal for current availability, pricing and access. Preview titles are shortened descriptions.
CHOOSE YOUR NEXT CHALLENGE
Start with the question you want to answer. Find a workflow that fits your learning or engineering task.
Build a topology, open the CLI and investigate routing and switching in a browser-based simulator.
Explore this workflowTurn a routing or connectivity question into a repeatable test, with clear expectations and documented limits.
Explore this workflowFind published scenarios, follow tutorials and explore practical assessments as they become available.
Explore this workflowFollow an MQTT message from a simulated sensor through a broker to its subscriber.
Explore this workflowA PATH THROUGH THE PRACTICE
Start with a scenario, build understanding step by step, and find out what you can do on your own.
Find a lab with a purpose. Browse network scenarios and course content, then bring a published lab into your workspace.
Explore MarketplaceTurn a concept into a working configuration. Follow guided tasks, verify supported checkpoints, and see your progress.
Explore tutorialsPut your lab skills to the test. Final assessments check your work and highlight the course topics to revisit.
How examinations workContent and assessments become available as they are published. Access depends on the selected pack and your plan.
IoT SIMULATION
Connect simulated sensors, MQTT brokers, and subscribers. Follow telemetry across your topology and explore how connected devices communicate.
Explore IoT simulationsIoT features require an eligible Enterprise plan.
22.4 °CBEFORE YOU START
A clear picture of what you can practice, what access you need and where simulation ends.
nuLAB is a browser-based network simulator. It models supported commands and network behavior rather than running proprietary network operating-system images. Its standard offering does not provide those images. Understand the simulation model.
You can investigate supported configuration, routing and connectivity behavior in a simulated topology. Record the assumptions and expected results for each test. Simulation does not establish exact hardware performance, complete feature parity or production readiness. Plan a scoped validation exercise.
Access depends on your plan and the content that has been published. Marketplace packs can have separate entitlements; examinations require published assessment content. IoT features require an eligible Enterprise plan. Explore learning and device availability.
Use appropriate hardware or an authorized environment to verify hardware-specific behavior, throughput, optics, platform licensing and other requirements the simulator does not model. Read the platform disclaimer.
FROM THE PORTAL
This release is published in the portal. A reviewed summary is not available here yet; open the technical notes for its changes.
This release is published in the portal. A reviewed summary is not available here yet; open the technical notes for its changes.
This release is published in the portal. A reviewed summary is not available here yet; open the technical notes for its changes.
FIELD NOTES
THE NEXT MOVE IS YOURS
Your next networking breakthrough starts with a little hands-on practice.
