Beginner CCNA lab (1 of 10) focused on configuring and verifying IPv4 interface addressing on Cisco IOS routers. Learners assign given /24 addresses to two router interfaces and validate directly-connected reachability. No routing protocols or static routes are configured in this lab.
Start here — freeIP Addressing & Subnetting
Ten hands-on addressing labs — IPv4 subnetting and VLSM, IPv6 addressing (SLAAC/EUI-64), and connectivity verification.
Topics
What you'll learn
- Configure IPv4 addresses and masks on IOS router interfaces using ip address <addr> 255.255.255.0
- Bring interfaces administratively up using no shutdown
- Verify interface state and addressing with show ip interface brief and show running-config interface
- Validate directly-connected reachability with ping between neighbors and a host-to-gateway test
- Perform correct /24 to /26 subnetting and identify subnet boundaries
- Apply deterministic IPv4 interface addressing on IOS with dotted-decimal masks
- Map each link to its assigned subnet based on an allocation rule
- Verify directly-connected reachability without any routing protocol or static routes
Included labs
Hands-on IPv4 subnetting and interface addressing on three IOS routers and one client. You will split a /24 into four equal /26s, assign the correct /26 mask to each link, and configure deterministic lowest-usable addressing on router interfaces. No routing protocols or static routes are used; verification is strictly directly-connected reachability.
View lab detailsPractice deterministic VLSM planning and interface addressing on two Cisco IOS routers. Starting from a single /24, allocate three right-sized IPv4 subnets (two LANs represented by loopbacks and one router-to-router WAN) and configure exact interface addresses and masks. No routing protocols or static routes are configured; verification focuses on directly connected reachability and show commands.
View lab detailsBuild confidence addressing IPv4 point-to-point WAN links on Cisco IOS using /30 and /31 masks. Two routers are connected by two parallel links: one classic /30 and one RFC 3021 /31. No routing protocols or static routes are configured — the goal is deterministic, correct interface addressing and verification of directly connected reachability. A small LAN off R1 with two hosts allows additional verification (host-to-gateway only).
View lab detailsConfigure a Cisco IOS router to host two IPv4 /24 subnets on a single physical LAN interface using a secondary address. Verify directly-connected reachability only (no routing protocols, no static routes). This simulates a readdressing coexistence period where both old and new subnets must operate concurrently on the same segment.
View lab detailsEnable IPv6 forwarding and configure IPv6 global unicast addresses on directly connected links only. No routing protocols or static routes. Verify that each device can reach only its directly connected neighbors using IPv6.
View lab detailsConfigure IPv6 global unicast on a router-to-router link using EUI-64-derived interface IDs. Enable IPv6 unicast routing, set explicit link-local addresses, and verify that each router auto-forms its 64-bit interface ID from the MAC (FFFE insertion with U/L bit flip). Validate directly-connected reachability only. No routing protocols or static routes.
View lab detailsAdvanced IPv6 interface addressing on Cisco IOS routers. Configure explicit, predictable IPv6 link-local addresses alongside global unicast addresses on a point-to-point router-to-router link. Validate with show commands and neighbor pings using the link-local as the destination, and confirm host-to-gateway reachability on local LANs. No routing protocols or static routes are used; focus is strictly on interface IPv6 addressing mechanics.
View lab detailsConfigure and verify dual-stack IPv4 and IPv6 addressing on Cisco IOS router interfaces. R1-R2 share a /30 IPv4 and /64 IPv6 point-to-point transit, while R1 provides a dual-stack user LAN gateway. No routing protocols or router static routes are permitted; verify only directly connected reachability.
View lab detailsAdvanced IP addressing capstone, run as a fault hunt. A branch build has been handed over and nothing quite works: one LAN cannot reach its gateway, a transit link behaves as though the two ends are on different networks, one router will not accept traffic on a point-to-point link, and two devices answer to the same loopback. You get symptoms and the required end state — no fault list. Every fault is an addressing decision that looks plausible until it is checked against the mask.
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Start with the free study hub and guides, then practice the same topics on real Cisco IOS.
Frequently asked questions
What's included in the IP Addressing & Subnetting bundle?
10 hands-on, auto-graded CCNA labs spanning 15 topics — each one a real Cisco Modeling Labs scenario you build on Cisco IOS.
Can I buy this bundle?
No — a subscription is the only plan we sell, and it includes every lab in this bundle for as long as it's active. Anyone who bought this bundle previously keeps it: every lab stays downloadable and gradable, permanently.
Do I need my own Cisco CML to run these labs?
Yes — each lab is a Cisco Modeling Labs (CML) topology you import and build on real Cisco IOS, and the CML free tier is enough. You download the topology and lab guide, then build it yourself.
How does the grading work?
Every lab ships as a problem to solve. You build it in CML, then submit your config to grade it against the answer key — you get a pass/fail on each objective, so you know exactly what's right and what to fix instead of guessing.
Which certification is this bundle for?
CCNA. The labs are sequenced to build the hands-on configuration and troubleshooting skills CCNA candidates are expected to demonstrate on real gear.