Control Board Executive

The control board executive (CBE) runs on the control board and facilitates communication between the SSP and the platform.

When power is applied, both control boards boot from the main SSP. After the CBE is booted, it waits for the control board server and the fod (failover) daemon running on the SSP to establish a connection. The connections between the fod daemon and the control board facilitate SSP and control board failover.

A failover task within CBE enables the main and spare SSP to establish connections for monitoring failover conditions. This task listens for and accepts TCP/IP connections from the fod daemons running on the main and spare SSP. The failover task also reads and transmits heartbeat messages to the fod daemons on both the main and spare SSP.