Artesyn ATCA-7368 Installation and Use (June 2014) - Manual (Page 92)

Functional Description
ATCA-7368 Installation and Use (6806800M12D) 92
The IPMC provides a watchdog that supervises the payload. If enabled, the payload software
needs to retrigger the Watchdog to prevent time-out. A watchdog time-out can generate a
NMI, a payload reset or disabling/cycling of the payload power. The watchdog settings,
including enable/disable, can be changed by payload software (setup menu). Time-out values
can be selected from as short as seconds to as long as minutes.
The IPMC is supervised by a separate hardware Watchdog, which can not be disabled. IPMC FW
retriggers the Watchdog timer.
The IPMC monitors the Port 80 POST codes generated by the payload CPU. The IPMC is
connected to various sensors on the Blade that provide temperature sensor readings at all
major devices and voltage sensor readings of all major voltages. The IPMC monitors reset
events caused by devices like Watchdog, IPMI command, and reset button.
The FRU information of the various modules including front board, RTM, and other modules
can be read via the IPMC and if necessary upgraded through the IPMC.
The IPMC features Serial over LAN (SOL) for the payload CPU serial console. The SOL interface
is available via the ATCA Base I/F. SOL is activated by specific IPMI commands.
5.11 Serial Redirection
The CPU serial redirection reroutes the console input and output; that is the text output to the
text screen and input from the standard keyboard. Typically, the console is used by the BIOS
setup menus, BIOS initialization and boot routines, OS boot loaders and loaded OS.
The serial console of the payload CPU is available via SOL. In addition to the SOL capability, the
serial console is also available on the blade faceplate using a RJ45 connector with Cisco pin-out.
If a SOL session is established, only the output is available on the faceplate. Input is not possible
during this time via the faceplate. Alternatively to the CPU serial console, the IPMC serial
console is also available on the faceplate serial connector. It can be selected via specific IPMI
OEM command.