On which module of a large chassis switch does the primary processing occur?

The primary processing on a large chassis switch occurs on the Supervisor Engine. This module is responsible for the overall control and management of the switch, including the coordination of data traffic, managing the individual line cards, and ensuring that the network operates effectively. The Supervisor Engine typically includes the CPU, memory, and operating system, making it the central point for processing data and executing control functions.

While service modules and line cards perform specific tasks—such as providing additional services or port connections—they do not handle the overall processing functions. The management module is primarily focused on configuration and management tasks rather than core data processing. This hierarchy underscores the critical role of the Supervisor Engine in the overall architecture of large chassis switches.