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Quick overview

Use Packet Tracer for advanced editing and conversion tasks directly in your browser with full local control.

Web packet tracerBrowser network simulatorCisco ios cli simulatorArp and icmp packet visualizerLayer 2 switch mac learning simulatorLayer 3 router static routing lab

Web Packet Tracer & Interactive Network Simulator

Build, cable, and simulate computer networks directly in your browser. Place PCs, Layer-2 switches, and Layer-3 routers on an interactive canvas, configure interfaces via a Cisco IOS-like CLI, and watch ARP and ICMP packets animate hop-by-hop.

100% Client-Side•Data never leaves your device
Preparing interactive network topology canvas and CLI simulator...
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About BrainyTools Web Packet Tracer

The BrainyTools Web Packet Tracer is a 100% client-side network topology builder and packet simulator designed for networking students, CCNA candidates, and systems engineers. Place PCs, 8-port Layer-2 switches, and 3-port Layer-3 routers onto an interactive React Flow canvas, cable specific Ethernet interfaces together, configure IPv4 addressing and static routes via an authentic Cisco IOS-style terminal, and observe ARP and ICMP packets travel across links in real time or step-by-step mode.

Core Capabilities

Interactive Topology Canvas

Drag PCs, Switches, and Routers and cable individual ports (eth0, Fa0/1..8, Gi0/0..2).

Cisco IOS-Style CLI

Supports command abbreviations (conf t, int gi0/0, sh ip int br), ? help, and Tab completion.

Live Packet Animation

Color-coded ARP (amber), ICMP (indigo/blue), and Drop (rose) packets animate along links.

Layer-2 MAC Learning

Switches learn source MAC addresses dynamically, flood unknown unicasts, and filter frames.

Layer-3 Longest-Prefix Routing

Routers forward across connected and static routes, decrement TTL, and emit ICMP errors.

Realtime & Step Debugging

Adjust simulation speed (0.5x to 4x) or advance one discrete network event per click.

Supported CLI Commands Reference

  • Router (IOS CLI): enable, configure terminal, hostname <name>, interface Gi0/0, ip address <ip> <mask>, no shutdown / shutdown, ip route <net> <mask> <next-hop>, show ip interface brief, show ip route, show arp, show running-config, ping <ip>
  • Switch (IOS CLI): enable, configure terminal, hostname <name>, interface Fa0/1, shutdown / no shutdown, show mac address-table, clear mac address-table, show ip interface brief, show running-config
  • PC (Command Prompt & Desktop UI): ipconfig, ipconfig /all, ping <ip>, tracert <ip>, arp -a, plus a graphical IPv4/Mask/Gateway desktop form.

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