Artesyn System Management Interface Based on HPI-B (Centellis 2000 R3.0/4411) User's Guide (June 2014) - Manual (Page 18)

System Management Interface Overview
System Management Interface Based on HPI-B (Centellis 2000 R3.0/4411) User’s Guide (6806800P20C) 18
A supervisor which runs on both ATCA-MF106/SAM1411 blades monitors the activity of the
peer ATCA-MF106/SAM1411 and of the corresponding switch blade and it will make sure that
under normal conditions the ATCA-MF106/SAM1411 corresponding to the currently active
switch is also active.
If the supervisor detects that either a switchover or failover was performed between the two
switch blades or if it detects that the previously active ATCA-MF106/SAM1411 has failed, it will
perform a switchover of the ATCA-MF106/SAM1411 blades and the previously deactivated HPI
daemon will become active. Note that a switchover between the HPI-B daemons can also be
triggered by the user through OEM HPI controls.
No data is replicated between the two HPI daemons. The only exception are HPI resource IDs.
They are written into a file and read in again by the newly started up HPI daemon after a
failover. This file is replicated from the active Shelf Manager to the standby when HPI daemon
starts up or when a resource is added/deleted from the file, while the daemon is running.
An HPI application that wishes to access an HPI daemon has two options to do this: access the
HPI daemon via the physical or via the virtual IP address assigned to the ATCA-
MF106/SAM1411 blades. For further details refer to
Configuring HPI Clients on page 29 .