Icmb - Motorola IXP-9120 Reference Manual

Devices' features and Data Paths
IBMU runs totally independent of the IXP2400, its main task being monitoring and logging of
events.
IBMU shall be fully functional even when the IXP/CPCI-9120 is not powered.
IBMU is mapped on to IXP2400's SlowPort area. Communication between the IPMI control-
ler and the IXP2400 is achieved through the General Purpose EPLD, which translates slow-
port signals into X-bus and vice versa.

ICMB

ICMB is an RS-485-based bus used to connect the BMCs of two or more chassis. The ICMB
port of IXP/CPCI-9120 is located on the RTB. Connections from the IPMI controller are
routed through CompactPCI connectors to the RTB.
IXP/CPCI-9120
Block Diagram
87