– Many 3750E administrators reported random stack master re-elections in older versions. SE11 is considered the most stable final image for mixed 3750E/3750 stacks.

(ROMMON) to support the new OS, a process that took 35-40 minutes and required that the switch not be turned off. The Legacy

Based on the specific firmware version you provided (), which is the Catalyst 3750-E IP Base IOS version 15.0(2)SE11, the most interesting paper to write would not be a standard configuration guide. Instead, it would be a forensic analysis of this specific release’s troubled history and its role in the "Smart Licensing & Memory Leak" era of Cisco Catalyst switches.

: The universal image allows users to activate different feature sets (IP Base, IP Services) via license keys without needing to swap the underlying binary file. Installation and Upgrade Procedure