# 10 Redundancy

This chapter describes the redundancy functions and redundant application functions, available in SwitchKit. This chapter also describes the SK API messages for application redundancy and LLC redundancy. The chapter provides prototype information, possible error return values, and a description of what the function does.

Most functions return an integer value. Upon successful completion, that return value is OK (0). Non-zero return values indicate some error conditions. Each function lists the associated error conditions.

Some functions return pointers; those functions do not have a status value indicating success or failure.

In this section:

sk_activateExnetMatrix()

sk_registerAsRedundantApp() / sk_deregisterAsRedundantApp()

LLC and Application Redundancy

API Messages used for Redundancy