Cisco IOS images are copyrighted. Only download this file if:
: Typically requires 1024 MB RAM and 1024 KB NVRAM to operate within emulators like EVE-NG. Why Use IOU in Labs?
: Being a 32-bit binary, it often requires libssl1.0.0:i386 or similar legacy 32-bit libraries to run on modern 64-bit Linux distributions. Security and Legal Warning
Many older IOU L2 images, such as the 15.1g or 15.1a versions, are notorious for crashing with when certain features like Private VLANs or complex Spanning Tree configurations are applied. Users on Google Groups and GNS3 Communities have frequently reported that newer builds—specifically the 15.2 releases—solve these stability issues, allowing for reliable inter-VLAN routing and better performance on local servers. Key Features of the May 2018 Build:
