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 Duration 21 hours

Course Outline

Overview of GNS3 for Network Simulation

  • GNS3 architecture and its capabilities for design and testing
  • Comparison of GNS3 with physical labs and other simulators
  • Recommended hardware, OS, and setup guidelines

Preparing the GNS3 Environment

  • Installing the GNS3 GUI and GNS3 VM
  • Connecting GNS3 to physical devices and virtual machines
  • Incorporating Docker containers, appliances, and external tools

Building Enterprise Network Topologies

  • Layer 2 and Layer 3 network components
  • Simulating multi-site WANs and data centers
  • Representing cloud and hybrid architectures in GNS3

Replicating Production Environments

  • Capturing configurations from live networks
  • Importing existing routing and switching setups
  • Designing scalable testbeds with realistic traffic patterns

Testing, Validation, and Documentation

  • Techniques for traffic generation and fault injection
  • Automated testing scenarios including BGP failover, QoS, and ACLs
  • Packet capture and flow validation using Wireshark

Integration with Other Tools

  • Connecting GNS3 to VirtualBox, VMware, or KVM
  • Incorporating Linux-based services (DHCP, DNS, FTP) into topologies
  • Linking with network automation tools such as Ansible

Advanced Use Cases and Best Practices

  • Leveraging GNS3 for network migrations and proof-of-concept testing
  • Conducting load testing, failover simulation, and performance tuning
  • Executing client demonstrations and architecture validation exercises

Summary and Next Steps

Requirements

  • A solid grasp of network protocols and architectures
  • Hands-on experience configuring network equipment such as routers, switches, and firewalls
  • Familiarity with virtualization and system administration tools

Audience

  • Network engineers and system architects
  • IT consultants overseeing network planning and migration
  • QA and testing teams assessing network changes
  • Professionals responsible for replicating production environments in labs

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