dynamips ☆

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Description:
Cisco 7200/3600/3725/3745/2600/1700 Router Emulator

Type: Formula | Latest Version: 0.2.23@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: emulator cisco networking ios gns3

Install: brew install dynamips

About:
Dynamips is a Cisco router emulator that accurately simulates the hardware of Cisco 7200, 3600, 3725, 3745, 2600, and 1700 series routers. It executes real Cisco IOS images, allowing for high-fidelity network topologies without physical equipment. This tool is the core emulation engine behind the popular GNS3 network simulator.

Key Features:

Runs unmodified Cisco IOS images directly on x86 platforms
Provides cycle-accurate simulation of MIPS and PowerPC processors
Supports emulated network modules and chassis for various router models
Integrates with GNS3 for graphical topology design and management

Use Cases:

Practicing for Cisco certification exams (CCNA, CCNP, CCIE) in a safe environment
Designing and testing complex network topologies before physical deployment
Developing and testing network automation scripts against real IOS features

Alternatives:

QEMU – QEMU is a more general-purpose machine emulator that can run full OSes, but Dynamips is specifically optimized for cycle-accurate Cisco IOS emulation.
EVE-NG – EVE-NG is a complete network emulation platform that includes Dynamips, but Dynamips itself is the underlying, standalone emulation engine.

License: GPL-2.0-only

Dependencies: elfutils

Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, arm64_ventura, arm64_monterey, arm64_big_sur, sonoma, ventura, monterey, big_sur, arm64_linux, x86_64_linux

Version History

Detected	Version	Rev	Change	Commit
Sep 13, 2025 6:43pm		0	VERSION_BUMP	587e078d
Sep 12, 2024 8:31am		0	VERSION_BUMP	7cf08d52