This is the feature set. advipservices stands for . This license tier is one of the most feature-rich available for the 2691 platform. It includes:
: Extensive support for WICs, VICs, and NMs (e.g., NM-16ESW, WIC-2T). 3. Ideal Use Cases
While the Cisco 2600 series is officially "End-of-Life" (EoL), this specific image remains a staple for students pursuing Cisco certifications (like the CCNA or CCNP) and engineers maintaining older enterprise footprints. Understanding the Naming Convention
: The "Advanced IP Services" feature set—the "keys to the kingdom" that allowed for complex VPNs and security features.
: The "Advanced IP Services" feature set, which includes advanced routing, security features like Firewall and IDS, and full IPv6 support. The "k9" signifies it supports high-grade encryption. mz : Indicates the file is RAM-resident and compressed. 124-17 : Refers to the IOS Mainline version 12.4(17) . C2691-advipservicesk9-mz.124-17.image
This version supports Multiprotocol Label Switching, which is critical for engineers learning service provider technologies. Why is this image still popular?
Due to its age, the legal landscape for obtaining this IOS image is strict. , which requires:
: Ensure the platform is correctly identified as C2691 .
: The maintenance release version. This is part of the 12.4 Mainline train, which is known for stability. This is the feature set
: The m denotes that the image runs out of RAM, while the z reveals it uses zip compression to reduce storage footprints.
: Provides advanced traffic management features, including IP classification, marking, and queuing, essential for voice and video optimization.
Using "leaked" versions found on mirror sites or forums is a violation of Cisco’s End User License Agreement (EULA). Final Thoughts
When used in Dynamips within GNS3, this image requires moderate CPU and memory compared to newer router models, making it suitable for running multiple routers on a single computer. It includes: : Extensive support for WICs, VICs,
: Advanced routing protocols (OSPF, EIGRP, BGP), IPv6 support, and Quality of Service (QoS).
| Requirement | Minimum Value | Recommended Value | | :--- | :--- | :--- | | | 32 MB | 64 MB | | DRAM (RAM) | 128 MB | 256 MB | | File Size | ~ 25 MB | - |
There are several types of IOS images available for Cisco routers, including: