This is a list of the software and hardware directly used by the SP Switch2
component of PSSP. Problems with the requisite software and hardware
may manifest themselves as error symptoms in the SP Switch2. If you
perform all the diagnostic routines and error responses listed in this
chapter, and still have problems with the SP Switch2, you should consider
these software and hardware components as possible sources of the
error. They are listed with the most likely candidate first, least
likely candidate last.
System Data Repository (SDR) component of PSSP, running on the control
Ethernet component of AIX - For SP Switch2 operation, there must be at least
one connection between the control workstation and the primary node. SP
Switch2 Time-Of-Day recovery depends on an Ethernet connection to all the
Group Services hags, Topology Services hats, and Hardware
Monitor hmmon components of PSSP
SP System Security Services
Principal and group names for DCE entities use the default SP chosen
names. These may not be the actual names on the system if you have
overridden them using the spsec_overrides file.
SP Switch2 hardware monitor and control: hardmon component of
Switch Fault service: the Fault Service daemon component of the SP
Switch2 has to be operating on each node that is on the SP Switch2.
When the daemon dies, the protocols (such as IP) are closed on this
node. This is different than operation of the SP Switch. For the
SP Switch, when the Fault Service daemon dies, the protocols continue, only SP
Switch recovery is not available.
Switch Time Of Day (TOD): initiated and recovered by the
emasterd daemon component of SP Switch2 software. This daemon
runs on the control workstation and is responsible for selecting a suitable
Master Switch Sequencer Node that maintain the Switch TOD. When the
daemon dies, the Switch TOD recovery dies. The Switch TOD is maintained
only to nodes that are on plane 0.
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