When the local remote switch card switch setting changes,
it causes each RPC to set interrupts for the management
console and the
storage facility image LPARs. When the switch setting being reported
by the two RPCs disagrees, the management
console will create
a serviceable event and then fence the RPC that is reporting a switch
change.
About this task
This MAP is required when the Local / Remote switch setting
is changed and that change is not reflected in an interrupt to the
management
console from either
RPC card. The signal to each RPC is provided by independent switch
contacts. When the switch is opened, the +Local signal to each RPC
is pulled up at the RPC. Therefore, Local becomes the default setting
if the RPC card to local remote switch card cables are disconnected.
The +Local signals to both RPC cards only come together at the switch
on the LR/ZLR logic card so a failure of the switch or the card will
be the cause of this failure.