Artesyn AXP1440, Installation And Use Manual, Page: 47 / 156

Platform Architecture
AXP1440 Installation and Use (6806800H23U) 45
The fabric interface switch is also extended outside the AXP1440 shelf through eight external
connectors on the RTM.
1.4.3 IPMI Network
The Intelligent Platform Management Interface (IPMI) is based on a redundant radial topology.
Redundant IPMI networks are supported by the Shelf Management Alarm Module (SAM) to
manage the shelf resources.
The SAM is the center of the IPMI network; hubs are the center of the Base Interface network.
The SAM connects to all slots in the shelf and monitors and reports on the content of the
AXP1440. The SAM collects environmental data from sensors within the shelf and can assist
high availability software to determine when a failover is necessary due to hardware removal
or environmental changes, such as an over-temp condition.
The SAMs contain the Shelf Management Controller (ShMC) which polls all devices resident to
the shelf and collects the FRU data records for all the components. The SAM also manages non-
IPMI devices for the shelf and performs environmental monitoring of the temperature and
voltage. Using the PICMG 3.0 standard, the SAM is able to power off and reset slots for hot swap
capability.