. Unlike newer images that require massive amounts of RAM, this version runs incredibly "light." Version 12.4(17):
: Configure NM-16ESW (Switch Module) or WIC-2T (Serial Module) as needed.
Router# reload
1. Decoding the IOS Filename: C2691-advipservicesk9-mz.124-17.image
: Represents the feature set designation ( Advanced IP Services ). The k9 tag dictates the presence of strong cryptographic features, including 3DES and AES encryption. C2691-advipservicesk9-mz.124-17.image
For network engineers, CCNA candidates, and CCNP students, the c2691-advipservicesk9-mz.124-17.image is a classic choice for GNS3 simulation.
: Full dual-stack IPv4/IPv6 capabilities, including RIPng, OSPFv3, and IPv6 static routes. 2. Enterprise Security and VPN Capabilities (k9) Decoding the IOS Filename: C2691-advipservicesk9-mz
Statefull packet inspection (Context-Based Access Control or CBAC) to secure the perimeter.
Indicates the file runs from RAM and is compressed (ZIP format). : Full dual-stack IPv4/IPv6 capabilities