Ability to perform routing between VLANs using Switch Virtual Interfaces (SVIs) 1.2.2.
Unlike standard IOS images designed to run on physical hardware ASICs, or heavy virtual machines like Cisco vIOS, IOU images are lightweight Linux binaries. Technical Architecture: Why Use IOU?
#! /usr/bin/python import os import socket import hashlib import struct
If you get invalid memory access or a kernel panic, reduce the RAM to 192 MB or increase the bigphysarea to 20000 .
: In GNS3, you point the application to this file in the settings. In EVE-NG, place it in the same directory as your images ( /opt/unetlab/addons/iol/bin/iourc ). 3. Key Image Capabilities i86bi-linux-l2-adventerprisek9-15.2d.bin
After console connection, you should see:
To use i86bi-linux-l2-adventerprisek9-15.2d.bin in any lab emulator, you must have two components: The image binary file itself.
Troubleshoot (like "license not found" or "libcrypto errors").
Compared to VIRL/vIOS images, IOU images are extremely lightweight. You can run 20-30 switches on a laptop with 8GB of RAM. Ability to perform routing between VLANs using Switch
: Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol (LACP/802.3ad).
To understand what this file does, it helps to break down its naming convention, which follows Cisco’s standard naming structure for virtual images:
Upload the binary to the following directory: /opt/unetlab/addons/iol/bin/ Upload your iourc license file to the same directory.
The filename i86bi-linux-l2-adventerprisek9-15.2d.bin is not random. It follows a Cisco naming convention that tells you exactly what the image is: In EVE-NG, place it in the same directory
Because it runs real Cisco IOS code (compiled for x86), it behaves identically to physical hardware for most protocols.
: Uploading the binary to a simulation server like the GNS3 VM or EVE-NG's IOL (IOS on Linux) directory.
: Standard STP (802.1D), Rapid STP (802.1w), and Multiple Spanning Tree (MSTP/802.1s).
Linux file permissions must be fixed (often using a wrapper script) to make the binary executable.