: Cisco IOL images are proprietary and are generally intended for Cisco employees or authorized partners via Cisco Modeling Labs (CML) . Downloading them from third-party sites like Internet Archive or GitHub is common in the labbing community but may fall outside official licensing terms. Cisco IOL (IOS on Linux) - - EVE-NG

Double-check your iourc file formatting. The file must match the specific hostname of your virtual machine. If the hostname changes, the calculated key inside the file becomes invalid. 2. Missing 32-bit Architecture Libraries ( i386 )

[license] i86bi-linuxl2-adventerprisek9-m-152-may-2018 = `cat /dev/urandom | tr -dc '0-9a-f' | head -c16`

Using this IOL image in is slightly different because GNS3 historically uses Dynamips for routers. However, modern GNS3 supports "IOU" (IOS on Unix) integration: