The linuxl3 identifier is crucial for those studying switching. Standard router images in GNS3 often struggle to simulate Layer 3 switching features accurately. This specific image behaves much like a Layer 3 switch (similar to a 3560 or 3750), allowing you to practice:
Copy i86bi-linuxl3-adventerprisek9-m2.157-3.may.2018.bin to your /opt/unetlab/addons/iol/bin/ directory (Eve-NG path) or the IOU folder in GNS3.
As of 2025, Cisco has shifted focus to:
However, the IOL images remain a mainstay for legacy CCIE RS (retired in 2020) and low-resource routing labs. This specific image – May 2018 – represents the last stable, widely available IOL L3 image before Cisco moved to newer virtualization methods.
Alternative free options for routing labs: i86bi linuxl3-adventerprisek9-m2 157 3 may 2018.bin
But none will give you the exact Cisco CLI and behavior of i86bi-linuxl3-adventerprisek9-m2.157-3.May.2018.bin.
If you have spent any time building Cisco virtual labs using EVE-NG, GNS3, or PNETLab, you have likely encountered a file with a very long, descriptive name. One of the most common and stable images for Layer 3 routing studies is the i86bi linuxl3-adventerprisek9-m2 157 3 may 2018.bin. The linuxl3 identifier is crucial for those studying
But what exactly is this file? Is it the right one for your CCIE or CCNP lab? Let's break down the nomenclature, its use cases, and its limitations.