Appendix C Intelligent Platform Management Interface; Iswitch-Shmc Interaction - HP bh5700 User Manual

Appendix C Intelligent Platform Management Interface

The Ethernet Switch Blade provides Intelligent Platform Management Interface (IPMI) support.
IPMI circuitry provides:
The communication channel between the Baseboard Management Controller (BMC) and the
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CPU for management.
Data storage, SDRR, FRU, access.
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Sensor readings.
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IPMI circuitry on the Ethernet Switch Blade peripheral management controller (PMC) provides
2
three I

ISwitch-ShMC Interaction

Switch reports state changes to ShMC.
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If event reporting is enabled, an event will be generated by the switch whenever a sensor
•
threshold is crossed.
Policy is enforced by the ShMC.
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Typical ShMC policy is to remove back-end power from a FRU that has crossed a threshold.
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M0
M1
M2
M3
M4
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C compatible serial interfaces:
I 2 C Port 0 Connects to the BMC on an Alarm or System card. The bus is called
IPMB. Via this connection the PMC can send status events, SDR 's and
FRU information to the BMC. It can also receive commands and control
information from the BMC.
I 2 C Port 1 Connects to the Ethernet Switch Blade CPU and the "spare" SEEPROM.
I 2 C Port 2 Connects to the boot and run time SEEPROMs as well as the switch
silicon.
No power and hot swap handle open
No communications. (Wait in M1 until hot swap ejector is closed)
FRU announces its presence to the ShMC and awaits activation permission
Activation
Operational state (command issued to enable back-end power)
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M States
release 3.2.2j page 348