Re-establish system connections when OptiConnect is installed

You should always use the Power Down System (PWRDWNSYS) command when you power down a system that is connected with OptiConnect. If you do not use the PWRDWNSYS command, you could experience difficulties with system-to-system connections.

Certain conditions can cause system-to-system connections to become inoperative. Performing an IPL on one of the systems is the only way to reestablish these connections.

You can avoid these conditions by using the PWRDWNSYS command. However, some conditions, such as abnormal operations, or loss of power on one system in the OptiConnect network, may make it necessary to perform an IPL. Additional examples are:

Emergency power off (EPO)
Utility or uninterruptible power supply failure
Hardware failures
Interrupted IPLs or failure of an IPL

If you suspect one of these conditions has occurred, check the status of the bus expansion adapter by using the Work with Hardware Resources (WRKHDWRSC) command. For more information on using this command, see Work with hardware resources (WRKHDWRSC). Report hardware failures by contacting your IBM® Service Representative.

Note:

Problems can occur if the odd bus on the Optical Link card was used to connect to a non-OptiConnect expansion unit. SeeSPD OptiConnect for more information on OptiConnect configurations.