Kontron AT8242 - Manual (Page 43)

27 AT8242
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Table 4-1:FRU ID and IPMB-L address information
The following figure shows the logical hardware management architecture for the AT8242.
Figure 4-1:AT8242 Hardware Management logical architecture
4.2.2 IPMC specific features
4.2.2.1 IPMC - ShMC interface
The principal management-oriented link within a Shelf is a two-way redundant implementation of the
Intelligent Platform Management Bus (IPMB). IPMB is based on the inter-integrated circuit (I2C) bus and is
part of the IPMI architecture. In AdvancedTCA Shelves, the main IPMB is called IPMB-0. Each entity attached
to IPMB-0 does so through an IPM Controller, the distributed management controller of the IPMI
architecture. Shelf Managers attach to IPMB-0 through a variant IPM Controller called the Shelf Management
Controller (ShMC). AdvancedTCA IPM Controllers, besides supporting dual redundant IPMBs, also have
responsibility for detecting and recovering from IPMB faults.
AT8242 entity FRU ID IPMB-L Address
P2010 switch management unit 0 0x20
NPU0 1 0x7A
NPU1 2 0x7C
RTM 3 0xA6
Hardware Management Subsystem
IPMC
MMC
MMC
Virtual
IPMB-L
NPU0
NPU1
KCS
KCS
P2010
KCS
RTM
(FRU3)
Shelf
IPMB-L
IPMB-0
Ethernet
Switch
FRU2
FRU1
FRU0
Base Interface
Fabric Interface