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4.4
IPMI Firmware
The Switch Management Controller communicates with the onboard Module Management Controller (MMC) using the Key-
board Controller Style (KCS) interface. The bootloader is able to communicate with the MMC, e.g. for POST error logging
purposes and fault resilient purposes.
The memory subsystem of the MMC consists of an integrated flash memory to hold the MMC operation code and integrated
RAM for data. The field replaceable unit (FRU) inventory information is stored in the nonvolatile memory on an EEPROM
connected via a local I2C interface to the MMC microcontroller. It is possible to store up to 4 Kbytes within the FRU inven-
tory information. Communication over IPMB bus to the BMC ensures that 'post-mortem' logging information is available
even if the main processor becomes disabled.
The onboard DC voltage, current, and temperature sensors are monitored by the MMC continuously. The MMC will log an
event into the BMC's System Event Log (SEL) if any of the thresholds are exceeded.
To increase the reliability of the Board management subsystem, an external watchdog supervisor for the MMC is imple-
mented. The MMC strobes the external watchdog within 800 millisecond intervals to ensure continuity of operation of the
board's management subsystem. The MMC watchdog supervisor does not reset the payload power and the restart of the
MMC will not affect the payload. The external watchdog supervisor is not configurable and must not be confused with the
IPMI v1.5 watchdog timer commands.
This external watchdog of the MMC is implemented inside the PLD and is used to supervise the operational state of the MMC.
4.4.1
Supported IPMI Commands
4.4.1.1
Standard Commands
Part of the command list in IPMI specification 2.0
M = mandatory, O = optional
Table 4-4:
Standard Commands
Command
IPM Device "Global" Commands
Get Device ID
Cold Reset
Get Self Test Results
Manufacturing Test On
Broadcast "Get Device ID"
BMC Watchdog Timer Commands
Reset Watchdog Timer
Set Watchdog Timer
Get Watchdog Timer
BMC Device and Messaging Commands
Set BMC Global Enables
Get BMC Global Enables
Clear Message Flags
Get Message Flags
Enable Message Channel Receive
Get Message
Send Message
Read Event Message Buf fer
Get Channel Info
59
IPMI 2.0 Spec.
NetFn
section
20.1
App
20.2
App
20.4
App
20.5
App
20.9
App
27.5
App
27.6
App
27.7
App
22.1
App
22.2
App
22.3
App
22.4
App
22.5
App
22.6
App
22.7
App
22.8
App
22.24
App
CP6924-1 User Guide
Support on
CMD
CP6924-1
M
[1]
01h
M / Yes
02h
O / Yes
04h
O / Yes
05h
O / Yes
01h
M / Yes
O
22h
O / Yes
24h
O / Yes
25h
O / Yes
O
2Eh
O / Yes
2Fh
O / Yes
30h
O / Yes
31h
O / Yes
32h
O / Yes
33h
O / Yes
34h
O / Yes
35h
O / Yes
42h
O / Yes
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