C2691-advipservicesk9-mz.124-17.image
Because the Cisco 2691 is End-of-Life (EOL), this specific image is most frequently used today in network simulation software like GNS3 or EVE-NG to practice Cisco routing and switching configurations in a virtual lab environment.
: The feature set, standing for Advanced IP Services . The "k9" indicates it includes strong Triple DES/AES payload encryption .
: This identifies the hardware platform. The Cisco 2691 is a modular router designed for mid-sized branch offices, offering higher performance than the standard 2600 series.
: Full support for IPv4 and IPv6 routing, including MPLS (Multi-Protocol Label Switching) and Layer 3 VPNs. c2691-advipservicesk9-mz.124-17.image
: Indicates the image runs from RAM ( m ) and is compressed ( z ).
: The target hardware platform, the Cisco 2600 series (specifically model 2691).
c2691-advipservicesk9-mz.124-17.image
The image c2691-advipservicesk9-mz.124-17.image refers to a specific designed for the Cisco 2691 Multiservice Router Go to product viewer dialog for this item. .
: The IOS version, specifically Mainline Release 12.4(17) . Use in Lab Environments
Here is a breakdown of what the filename signifies: Because the Cisco 2691 is End-of-Life (EOL), this
: Compared to newer IOS-XE images, this classic IOS file is relatively small and consumes significantly less RAM and CPU, allowing students to run complex topologies on standard laptops.
When deploying this image on physical hardware, ensure the router has sufficient memory and DRAM . Typically, the advipservices feature set requires at least 128MB or 256MB of DRAM to function correctly. In a virtual environment, ensure you use the correct Idle-PC value in GNS3 to prevent the router from consuming 100% of your host computer's CPU.
: Version 12.4(17) is known for being extremely stable, making it ideal for lab environments where you want to test configurations without worrying about software bugs. : This identifies the hardware platform
: Includes Cisco IOS Firewall, IPS (Intrusion Prevention System), and support for various VPN technologies (IPsec, GETVPN, and DMVPN).