GNS3 utilizes the GNS3 VM (running Ubuntu) to host IOL images. Go to .
This image delivers a robust set of Layer 2 features that make it exceptionally valuable for network design and testing.
List alternative if you are encountering too many bugs.
: The image will fail to boot with an "IOU License Error" if the host machine does not have a correctly configured iourc file mapped to the system's hostname. i86bi-linux-l2-adventerprisek9-15.2d.bin
In EVE-NG: Place the file in /opt/unetlab/addons/iol/bin/ and fix permissions using iol_fix_permissions . 3. Basic Configuration Example
Unlike traditional IOS images extracted from physical routers (which require an emulator like Dynamips to translate hardware instructions), an IOL/IOU image is a native Linux application. It runs directly on Linux user space, making it incredibly fast and efficient. Key Features and Supported Technologies
: Indicates the architecture. This image is compiled for x86 (Intel/AMD) 32-bit or 64-bit Linux architectures. GNS3 utilizes the GNS3 VM (running Ubuntu) to
One of the most famous, stable, and widely used Layer 2 images in the network virtualization community is (often referred to simply as the "15.2d L2 image").
: This is arguably the most critical section, defining the software's capabilities. The adventerprisek9 suite is the Advanced Enterprise feature set with strong cryptography . For a Layer 2 image, this means it is packed with virtually every switching feature Cisco could fit into a software-only solution, including:
Click , select the GNS3 VM, and upload the i86bi-linux-l2-adventerprisek9-15.2d.bin file. List alternative if you are encountering too many bugs
enable configure terminal hostname SW1 vlan 10 name Sales vlan 20 name Engineering interface Ethernet0/0 switchport mode access switchport access vlan 10 interface Ethernet0/1 switchport mode trunk trunk allowed vlan 10,20 spanning-tree vlan 10 root primary
: Network administrators might need to upgrade or recover an IOS on a Cisco device. This involves downloading the appropriate IOS image (like i86bi-linux-l2-adventerprisek9-15.2d.bin ) from Cisco's website, transferring it to the device, and then using the device's bootloader or IOS to install the new image.
The i86bi-linux-l2-adventerprisek9-15.2d.bin is a cornerstone of the network virtualization community for good reason.