Marcus spent his first week of CCNA study picking lab software instead of studying. Three days on Reddit threads. Two YouTube rabbit holes. A half-finished EVE-NG install he gave up on. By Friday he knew everything about every tool and had configured exactly zero routers.
Sound familiar? You’ve probably been there too.
Here’s the short version, so you don’t lose a week like Marcus. If you want real Cisco images with zero hassle, use Cisco Modeling Labs. If you want a free multi-vendor lab and don’t mind sourcing your own images, use EVE-NG. If you’re broke and stubborn, GNS3 still works fine. That’s the answer most articles bury 2,000 words deep.
But the right pick depends on what you’re studying, what hardware you’ve got, and how much you’re willing to pay. So let’s break down all three honestly, no vendor cheerleading, and figure out which network lab actually fits you in 2026.
The 30-second verdict
Quick answer first. All three run real network operating systems. All three will get you exam-ready. The difference is cost, how easily you get Cisco images, and how big your labs can grow.
| Tool | Cost (2026) | Real Cisco images? | Node limit | Best for |
|---|---|---|---|---|
| Cisco Modeling Labs (CML) | Free tier, then around $199/yr | Yes, built in | 5 free / 20 paid | Cisco-focused study, zero setup pain |
| EVE-NG | Free (Community) | Only if you supply them | 63 free / 1,024 Pro | Multi-vendor labs that scale |
| GNS3 | Free, open source | Only if you supply them | No limit (hardware-bound) | Tinkerers on a tight budget |
Read that table twice. The single biggest deciding factor isn’t price. It’s whether the tool hands you legal Cisco images or makes you go find them yourself. More on that catch below, because it trips up almost everyone.
Want the lab list that goes with these tools? Our guide to CCNA labs you can build free in EVE-NG gives you 10 ready-to-build topologies once you’ve picked your platform.
What is Cisco Modeling Labs (CML)?
Cisco Modeling Labs is Cisco’s own network simulator. It’s the official one. Which matters more than you’d think.
The big win is images. CML ships with real Cisco operating systems already inside, so you don’t hunt for IOS files on sketchy forums. You spin up a node, it boots actual Cisco software, you start configuring. No image sourcing, no licensing grey area, no “where do I get IOSv” thread. (Cisco’s own CML page covers the full feature set.)
Here’s how the 2026 tiers shake out:
- CML Free. Zero cost, single user, up to 5 nodes at once. Ships with IOL, IOL-L2, and ASAv images plus some Linux hosts. Unmanaged switches and external connectors don’t count toward the 5. (Confirmed on Cisco DevNet.)
- CML Personal. Around $199 a year. Bumps you to 20 simultaneous nodes.
- CML Personal Plus. Around $349 a year. Gets you 40 nodes.
- Enterprise. Big jump, into the thousands per year, for teams and labs that need 20+ node packs and central management.
The current build is CML v2.10. It’s a web-based tool, so you build topologies in your browser. Clean, modern, no clunky desktop client.
The catch? That 5-node free limit is tight. A full CCNP topology blows past it fast. And once you’re paying, you’re locked into Cisco gear only. No Juniper, no Palo Alto, no Fortinet. If your study is 100% Cisco, that’s fine. If you want a mixed network, it’s a wall.
Studying for the CCNA right now? Real Cisco images plus a structured lab plan beats random configs every time. Our CCNA Practice Workbook maps every lab to the exam blueprint so your CML or EVE-NG time actually counts.
EVE-NG: the multi-vendor workhorse
EVE-NG is the tool most serious lab builders land on eventually. And there’s a good reason.
It runs everything. Cisco, Juniper, Arista, Palo Alto, Fortinet, Linux, you name it. If a vendor ships a virtual image, EVE-NG probably runs it. That makes it the go-to for anyone studying beyond a single vendor or building labs that mirror a real mixed-vendor network.
Two flavours:
EVE-NG Community. Free, open source, capped at 63 nodes per lab. For 95% of CCNA and CCNP study, 63 nodes is plenty. You’ll never hit it.
EVE-NG Professional. A commercial licence, around $160 a year for one user. Unlocks 1,024 nodes, multi-user access with roles, custom templates, and support. The latest Pro release is 7.0.1-18, dated June 29, 2026, so it’s actively maintained. Most individual learners don’t need Pro. Teams and training shops do.
Now the catch, and it’s the same one that bites CML Free users. EVE-NG is an empty garage. It runs the virtual routers, but it doesn’t ship Cisco IOS inside. You bring your own images.
And as of early 2026, Cisco no longer offers public downloads of the standalone IOSv image through DevNet. So getting legal Cisco images for EVE-NG now means either a CML subscription (which gives you image access) or a Cisco account tied to an employer contract. We dug into this trade-off in detail in GNS3 vs EVE-NG, and it’s worth reading before you commit.
Setup is also heavier than CML. You’re installing a virtual appliance, loading images by hand, and matching hardware to your lab size. Our 5-step EVE-NG install guide walks through it without the usual errors, and the hardware requirements breakdown shows the real RAM and CPU numbers so you don’t buy the wrong lab PC.
Worth it? For multi-vendor study, absolutely. For pure Cisco-with-zero-fuss, CML is easier.
GNS3: the free open-source veteran
GNS3 has been around forever. It’s free, open source under GPLv3, and the latest version is 3.0.6 as of February 2026. Still alive, still updated.
The headline feature: no node limit. None. GNS3 runs as many devices as your hardware can handle. Got the RAM for 50 routers? Build 50 routers. The software won’t stop you.
Like EVE-NG, it’s multi-vendor and image-agnostic. You supply the images, GNS3 runs them. Same Cisco-image catch applies, you’ll need a legal source for IOS.
So where does GNS3 fall short next to EVE-NG? Two things, mostly.
First, it leans on a desktop client plus a separate GNS3 VM for heavier labs, which adds moving parts. Some people find that fiddlier than EVE-NG’s all-in-one web interface. Second, big topologies can feel less stable depending on your setup, though for a handful of nodes it’s rock solid.
Honestly, GNS3 is underrated for beginners on a budget. If you’ve got an old laptop, no money, and you’re starting CCNA, it does the job. You won’t outgrow it for a long while.
Here’s a real scenario. Aisha was unemployed, studying for her CCNA, and couldn’t justify $199 for CML. She installed GNS3 on a 6-year-old ThinkPad, sourced legal IOL images through a CML Free account, and ran her whole CCNA lab plan for $0. She passed in March. The tool was never the bottleneck. The study plan was.
The deciding factors, head to head
Forget brand loyalty. Four things actually decide this. Let’s score each tool where it counts.
Cost over a year
GNS3 wins outright. Free, no asterisk. EVE-NG Community is also free if you can source images. CML Free is free but the 5-node cap forces most CCNP students to pay around $199. So pure dollars: GNS3 and EVE-NG Community tie for first, CML costs more once you grow.
Getting real Cisco images
CML wins, and it’s not close. It’s the only one of the three that hands you legal Cisco images with zero hunting. With EVE-NG and GNS3, image sourcing is on you, and that’s harder in 2026 than it used to be. This single factor flips a lot of decisions.
Ease of setup
CML again. Web-based, images included, you’re configuring in minutes. EVE-NG is moderate. GNS3 is the most hands-on. If your patience for setup is low, CML earns its price here.
Scale and flexibility
EVE-NG and GNS3 win. Multi-vendor support and high node counts make them the choice for anyone going beyond Cisco or building large topologies. CML caps you at Cisco-only and lower node limits unless you pay up.
Make sense so far? Notice no single tool sweeps every category. That’s the whole point. The “best” one depends entirely on your situation.
So which should you actually use?
Let’s match the tool to the human. Find yourself below.
You’re brand new to networking, studying CCNA, zero budget. Start with GNS3 or EVE-NG Community, and use a CML Free account to get legal IOL images. Total cost: $0. You’ll be fine for the entire CCNA.
You’re CCNA-certified, pushing toward CCNP, and you value your time. Get CML Personal at around $199 a year. The built-in images and clean interface save you hours of setup pain, and 20 nodes covers most CCNP labs. If you’d rather stay free and don’t mind heavier setup, EVE-NG Community with sourced images works too.
You’re studying multi-vendor, security, or building a home lab that mirrors real production. EVE-NG, full stop. Community if you can, Pro if you need 100+ nodes or team access. Nothing else matches its vendor coverage.
You’re a training company or team. CML Enterprise or EVE-NG Pro. You need central management and multi-user roles, and the free tiers won’t cut it.
One more thing. Whatever you pick, the lab is just the garage. What you build inside it is what passes the exam. The official CCNA exam topics tell you exactly what to lab, so map your practice to that blueprint, not to random YouTube topologies.
Ready to stop comparing tools and start passing? SMEnode Academy’s live CCNA course pairs hands-on labs with an instructor who’s done the configs a thousand times, so you skip the “is my lab broken or is it me” guesswork entirely.
Common questions about network labs
Is Cisco Modeling Labs free in 2026?
Partly. CML Free costs nothing and runs up to 5 nodes for a single user. It’s a real, supported tier, not a trial. But 5 nodes is tight for anything past basic CCNA, so most people studying CCNP move to CML Personal at around $199 a year for 20 nodes.
Which is best for CCNA: CML, EVE-NG, or GNS3?
Any of them. For a true beginner with no budget, GNS3 or EVE-NG Community plus a CML Free account for legal images is the cheapest path. If you’d rather skip setup headaches and have $199, CML is the smoothest ride. The CCNA blueprint is small enough that all three handle it easily.
Can EVE-NG and GNS3 run real Cisco IOS?
Yes, but you have to supply the images yourself, and that got harder in 2026 once Cisco pulled public IOSv downloads. The cleanest legal route now is a CML subscription, which also unlocks image access. Without that, you need a Cisco account tied to an employer contract.
Do I need to pay for any of these to pass my exam?
No. A free stack of GNS3 or EVE-NG Community with CML Free images will get you exam-ready for CCNA and most of CCNP. You pay for convenience and scale, not for passing.
Bottom line
Three tools, one decision, and it’s simpler than the forums make it sound.
- Cisco Modeling Labs is the easiest path to real Cisco images, worth around $199 a year if your time matters and you’re Cisco-focused.
- EVE-NG is the multi-vendor workhorse that scales, free at the Community level if you can source images.
- GNS3 is the free, no-limit veteran that still does the job for budget-conscious beginners.
Don’t be Marcus, burning a week choosing. Pick the one that matches your budget and your study, install it today, and configure your first router tonight. The tool was never the hard part.
And once your lab is running, give it a real plan. Our CCNA Practice Workbook turns an empty topology into exam-day readiness, one lab at a time. Build it, break it, pass it.
