: If used today, isolate this router behind a next-generation firewall, restrict management access (ACLs, SSH only), and disable unnecessary services (CDP, HTTP, SNMPv1/v2c).
Verify after reboot that the router loads the new image. C2691-advipservicesk9-mz.124-17.image
advipservicesk9 (Advanced IP Services). This is one of the most comprehensive feature sets available for this era, including robust support for IPv6, advanced security (firewall/IDS/VPN), and MPLS. Format: mz indicates it runs from RAM and is compressed. : If used today, isolate this router behind
Understanding the C2691-advipservicesk9-mz.124-17.image Cisco IOS Software : If used today
If you are setting this up in a lab, here are the key technical requirements as noted in documentation like GNS3 : : Cisco 2691