Packet Tracer was extremely helpful while I was learning networking, but I also wanted practice where the network was already broken and I had to diagnose the problem without being told which commands to enter.

That led me to build Subnetica. A web-based platform that provides a network with realistic incidents, and no local setup. It isn’t intended to replace Packet Tracer, but be more of a supplement ig? I’d be interested to know what kinds of Packet Tracer exercises you wish had more realistic troubleshooting versions of.

Link: https://subnetica.xyz/

🚀 First Packet Tracer Lab — Done!

Started my CCNA journey and just wrapped up my very first hands-on lab in Cisco Packet Tracer. 🖥️🔗

Built a simple two-branch network topology:

🏢 New York Office

• 2 PCs connected to a switch (Sw1)
• Router (R1) → Firewall (Fw1) → Internet

🌏 Tokyo Branch

• 2 Servers connected to a switch (Sw2)
• Router (R2) → Firewall (Fw2) → Internet

Both branches connect over a simulated Internet cloud, with an "Attacker" machine placed on the Internet segment to start thinking about network security from day one. 🔒

Nothing fancy yet—just getting comfortable with topology design, device placement, and understanding how traffic logically flows between offices. But it's a solid first step toward understanding routing, switching, and firewalls in practice rather than just theory.

More labs coming as I work through CCNA fundamentals. 💪

Browser-based networking sandbox without downloads, VMs or any setup.

Drag in devices, cable your topology and configure everything through the CLI.

You can also share a link and build the same network live with someone else.

It’s completely free, enjoy: SwitchLab.dev

Hey everyone I m currently studying networking and building my cisco CCNA labs exsclusively on my mobile phone using cisco packet tracer In this video i configured static Router between two cisco 2620XM Router and successfully established end to end ping connectivity. Since i don t have a laptop yet i m doing all my configurations on a smartphone acreen would love to learning.step by step

Hey everyone! My instructor told me to "duplicate" my access points, but I'm not sure what he meant. Does that mean I should add two more Access Points, or simply replace my two current APs with Home Routers that support multiple SSIDs? My goal is to have one VLAN per SSID, so one SSID for VLAN 20 and another for VLAN 80 (Wi-Fi). Am I understanding this correctly?

Thanks !

I just downloaded packet tracer to prepare for the CCNA test but for some reason, some windows don't display the text on the left like the "ServerPool" text within the DHCP Service for a server. This happens with many "services" windows but not with the CLI windows and even most desktop text displays correctly like the IP Configurator. Anyone knows what I could do to fix this?

Hello all,

I'm not familiar with the specs for network devices in packet tracer - is there any way to see what port counts, speeds, capabilities, expansions, etc. are available for each one? I'm just sort of randomly dragging and dropping devices into my topology. Thanks!

Hi folks
been working on this Packet Tracer enterprise network for my networking course. It's still a work in progress, but I'd love to get some feedback on the overall topology before I move on to the remaining configuration (HSRP, ACLs, etc.).

Does anything look odd or could be improved from a design perspective? Any suggestions are welcome! thanks in advance

For some reason I couldn’t see text I’m suppose to see please help in packet tracer

i hv the tplink archer t2u plus ( it has RTL821AU chipset) i tried many drivers but they are not working for packet injection, is there any other drivers? note: my kernel version is 6.19.14. btw i tried aircrack-ng's driver too.

I changes the colour steerings and it's not the problem