After Control Board Failover

After a control board failover occurs, you must perform certain recovery tasks:

• Identify the failure point or condition that caused the failover and determine how to correct the failure.

  For example, if a control board failover occurred due to a faulty control board, you must determine whether you need to replace the failed control board.

  Use the showfailover(1M) command to review the failover state and verify which control board is responsible for the JTAG interface and system clock. Review the connection map in the showfailover output and the summary of the failover detection points in Chapter 10, SSP Internals.

  You can also review the platform log file to review other error conditions and determine the corrective action needed to reactivate the failed components.

• If a partial failover occurred, resynchronize the JTAG and system clock interfaces so that they are managed by the same control board.

  To resynchronize the JTAG and system clock interfaces, perform a complete control board failover as described in "To Force a Complete Control Board Failover". The first domain that is brought up resynchronizes the system clock and the JTAG interface on the primary control board.

• Once you have resolved the control board failure, re-enable control board failover (for details, see "To Enable Control Board Failover").