Do you ride old network software until it's unsupported or dead? Read about the benefits of maintaining up-to-date software and how they far outweigh the landmines of staying on old, unsupported versions.

Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Cupertino 17.9.x-Release Notes: Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Cupertino 17.9.x