The Integrated Management Module II (IMM2) is a second generation of the functions that were formerly provided
by the baseboard management controller hardware. It combines service
processor functions, video controller, and remote presence function
in a single chip.
The IMM2 supports the following basic systems-management features:
- Active Energy Manager.
- Alerts (in-band and out-of-band alerting, PET traps - IPMI style,
SNMP, e-mail).
- Auto Boot Failure Recovery (ABR).
- Automatic microprocessor disable on failure and restart in a two-microprocessor
configuration when one microprocessor signals an internal error. When
one of the microprocessors fail, the server will disable the failing
microprocessor and restart with the other microprocessor.
- Automatic Server Restart (ASR) when POST is not complete or the
operating system hangs and the operating system watchdog timer times-out.
The IMM2 might be configured to watch for the operating system
watchdog timer and reboot the system after a timeout, if the ASR feature
is enabled. Otherwise, the IMM2 allows the administrator to generate a nonmaskable interrupt
(NMI) by pressing an NMI button on the light path diagnostics panel
for an operating-system memory dump. ASR is supported by IPMI.
- A virtual media key, which enables remote presence support (remote
video, remote keyboard/mouse, and remote storage).
- Boot sequence manipulation.
- Command-line interface.
- Configuration save and restore.
- DIMM error assistance. The Unified Extensible Firmware Interface
(UEFI) disables a failing DIMM that is detected during POST, and the IMM2 lights the associated system error LED and the failing
DIMM error LED.
- Environmental monitor with fan speed control for temperature,
voltages, fan failure, power supply failure, and power backplane failure.
- Intelligent Platform Management Interface (IPMI) Specification
V2.0 and Intelligent Platform Management Bus (IPMB) support.
- Invalid system configuration (CONFIG) LED support.
- Light path diagnostics LEDs indicators to report errors that occur
with fans, power supplies, microprocessor, hard disk drives, and system
errors.
- Local firmware code flash update
- Nonmaskable interrupt (NMI) detection and reporting.
- Operating-system failure blue screen capture.
- PCI configuration data.
- Power/reset control (power-on, hard and soft shutdown, hard and
soft reset, schedule power control).
- Query power-supply input power.
- ROM-based IMM2 firmware flash updates.
- Serial over LAN (SOL).
- Serial port redirection over telnet or ssh.
- SMI handling
- System event log (SEL) - user readable event log.
The IMM2 also provides the following remote server management capabilities
through the ipmitool management utility program:
Command-line interface (IPMI Shell)
The command-line
interface provides direct access to server management functions through
the IPMI 2.0 protocol. Use the command-line interface to issue commands
to control the server power, view system information, and identify
the server. You can also save one or more commands as a text file
and run the file as a script.
Serial over LAN
Establish a Serial over LAN (SOL)
connection to manage servers from a remote location. You can remotely
view and change the UEFI settings, restart the server, identify the
server, and perform other management functions. Any standard Telnet
client application can access the SOL connection.