Create or edit /opt/unetlab/addons/iol/bin/iourc :
Dual-stack, tunneling, and translation mechanisms. Management and Security
| Feature | i86bi_LinuxL3-AdvEnterpriseK9... | i86bi_linux_l2-adventerprisek9-ms... | Dynamips Images (e.g., c7200-... ) | | :--- | :--- | :--- | :--- | | | IOL (Native Linux binary) | IOL (Native Linux binary) | Emulator (QEMU-based) | | Device Type | Layer 3 Router | Layer 2/Layer 3 Switch | Older hardware platforms | | Feature Set | adventerprisek9 (Advanced Enterprise) | adventerprisek9 (Advanced Enterprise) | Depends on the image | | Performance | Very High (low overhead) | Very High (low overhead) | Low to Moderate (higher overhead) | | Resource Usage | Very Low (RAM/CPU efficient) | Very Low (RAM/CPU efficient) | High | | Notable Issues | None known; highly stable | None known; highly stable | Can be buggy; no longer recommended |
On 64-bit systems, you may need to install 32-bit library support (e.g., libssl1.0.0:i386 ) since these are typically 32-bit binaries. Installation Path (EVE-NG) : Images are typically uploaded to /opt/unetlab/addons/iol/bin/ this image or how to add it to a specific emulator Cisco IOL (IOS on Linux) - - EVE-NG i86bi linuxl3-adventerprisek9-m2 157 3 may 2018.bin
While this image is incredibly powerful for lightweight lab builds, keep the following constraints in mind:
These images (also known as IOU - IOS on UNIX) are commonly used in virtual lab environments because they are much more resource-efficient than traditional virtual machines like Cisco IOSv Supported Platforms : Frequently used in Requirements They require a valid IOU license file) to run in these emulators.
Cisco IOL images require a validation license key contained within a file named iourc . This file maps the hostname of the host Linux operating system (or virtual machine) and a specific license string to authorize execution. Without a properly configured iourc file, the image will throw a license error and immediately terminate upon booting. Adding the Image to EVE-NG or PNETLab | Dynamips Images (e
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This image's primary advantage is its lightweight nature. Official EVE-NG documentation recommends allocating and 1024 MB of RAM per node for this image, with 1 vCPU being sufficient to run many instances. The official documentation for containerized IOL puts the minimum requirement at just 768 MB of RAM per IOL node, with a "very light" impact on CPU. This efficiency is critical for building large-scale topologies on limited physical hardware.
To use this image in modern network emulators like EVE-NG or GNS3, you must place the binary file in the correct directory and fix the file permissions. Step 1: Uploading the Image (Example: EVE-NG) Cisco IOL images require a validation license key
Because it carries the Advanced Enterprise license, this image supports:
Because this file carries the adventerprisek9 feature set, it supports nearly every enterprise-level protocol required for professional certifications such as Cisco Certified Network Professional (CCNP) and Cisco Certified Internetwork Expert (CCIE). 1. Advanced Routing Protocols