What action does the system take if the STATUS LED is red and redundancy is present?

When the STATUS LED is red and redundancy is present, the system typically indicates that there is a problem with the active supervisor engine. In such cases, it utilizes the redundancy feature by automatically shifting operations to the redundant supervisor engine. This ensures that the network remains operational despite potential issues with the primary supervisor engine.

This behavior is crucial in network environments where uptime is critical. By seamlessly transferring control to the redundant supervisor, the system minimizes downtime and maintains network stability. Other options wouldn't align with the expected behavior of a redundant system. For instance, continuing to operate normally could lead to further issues without addressing the underlying problem indicated by the red LED. Shutting down immediately would result in a loss of network functionality, and starting self-diagnostics might be part of the troubleshooting process but wouldn’t ensure immediate continuity of operations. The highlighted action represents an essential feature of redundancy, designed to protect the overall functionality of network systems.