GNS3 Fundamentals (Official Course) Part 2

Explore the shift from CLI to API-driven, centralized data center networking, and learn how software, open networking and disaggregation enable automation with Python and Ansible for vendor-flexible architectures.

Cisco SDN advocates network programmability and automation, urging engineers to learn Python, Ansible, and REST APIs to implement a single source of truth across devices.

Embrace the shift from traditional networking to programming and automation. Focus on Python, Linux, REST APIs, and tools like Ansible, Puppet, and OpenStack to stay competitive.

Explore free Cisco resources to master network programmability, from Python and APIs to Linux, Ansible, and GitHub, and follow a three-phase path toward cloud, container, and network function virtualization.

Download and install the GNS3 GUI for Windows, choose a hypervisor, and build a basic topology with the GNS3 PVM, testing connectivity between devices.

Learn to install the GNS3 VM on VMware Workstation Pro for Windows, align VM and software versions, enable nested virtualization, and run a basic topology on the GNS3 VM.

Discover how to download Cisco IOS images and run them in GNS3, create topologies with routers, switches, PCs, and docker containers.

Explore regular expressions in GNS3 and Python, applying them to show commands on Cisco devices with Netmiko. Learn patterns like dot means any character and escaping for literal dots.

Master regular expressions with dot star, zero or more repetitions, and escaping. See Python and Cisco CLI examples for testing patterns in show run pipe include and BGP access lists.

Explore regular expressions in GNS3 workflows, including dot, caret, dollar, and pipe syntax. Learn how to match beginnings, ends, and spaces (underscore) in network command outputs.

Explore GNS3 fundamentals with Python and regular expressions, using show commands, include, pipe, and escaping to filter BGP routes, autonomous systems and interface details.

Explore the VIRL version 1.3 updates, including EtherChannel bug fixes and improved CSR 1000v performance, with guidance to review the release notes.

Explore importing and running Cisco VIRL 1.3 iOSv templates in GNS3, compare iOSv 15.6.1 and 15.6.2, and configure ASA 9.7.1 on the GNS3 VM.

Learn to install and configure ASA 9.7.1 in GNS3 on Windows, import the ASA SCV image, run the GNS3 VM in VMware, and verify connectivity with routers.

Demonstrate integrating ASTM with a Cisco ASA in GNS3 and configuring ASDM access to a lab firewall with a Windows VM.

Configure a VIRL ASAv firewall with GNS3, boot Windows, install Java and ASDM, set IPs and interfaces, enable the HTP server, and verify connectivity to the net cloud.

Configure the VIRL ASAv firewall in GNS3 with ASDM, set outside and inside interfaces, enable DHCP on outside, apply PAT, configure a default route, and enable DNS and ICMP.

Discover step-by-step instructions to add a web java docker container in GNS3, boot and configure the ASA firewall, and access it via telnet to run the ASTM launcher.

Configure a VIRL ASAv firewall in GNS3 with ASDM, enabling outside and inside interfaces, DHCP on outside, a static default route, and PAT for internet access.

Compare packet tracer, GNS3, VIRL, and physical equipment to study networking. GNS3 often provides the ideal software solution with virtualized switching, supported by VIRL images and Cisco IOS emulation.

Explore Cisco packet tracer, a free, easy-to-set-up network simulator for Windows, Linux, and mobile, offering realistic device interfaces but with command limitations and no Cisco iOS images.

Discover gns3, a free open-source network virtualization tool for building large devices from Cisco, Juniper and more topologies locally or in the cloud, with VMware or VirtualBox.

Explore Cisco VIRL, a virtual lab that emulates Cisco devices such as IOS, Nexus OS, and layer 2 switches on your PC, with licensing and setup considerations.

Discover why physical lab equipment remains valuable for learning networking, with affordable switches and routers, real interfaces and cabling, and virtual devices like GNS3, Packet Tracer, or VIRL.

Explore networking lab options beyond GNS3, including remote rentals and Eve next generation, weighing device support, docker-based setups, and physical versus virtual lab tradeoffs.

Upgrade the GNS3 network automation docker container by pulling the latest appliance, removing the old one, and ensuring Python two and Python three work with persistent Namiko scripts.

Learn to download and install Ansible in a June three environment, where the network automation appliance ships with Ansible preinstalled for quick, internet-free setup.