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5

Using the Baseboard Management Controller

Intelligent Platform Management Interface

The

Intelligent Platform Management Interface (IPMI) defines

a set of

standardized,

message- based

interfaces

that

monitor system hardware health

(fan

speed, temperature,

voltage,

power

supply, etc.), control system components,

and

store data about important

system events

in a system event log

(SEL)

for later

examination.

IPMI

provides

the

foundation

for

remote

platform management.

Baseboard Management Controller

The key

component

in the IPMI

system

is the

baseboard management controller (BMC),

a

microcontroller located

in the

server’s motherboard. BMC

is the

“intelligence” within

the

IPMI

architecture, responsible

for

monitoring

and

controlling

the

system’s manageable

devices.

The

BMC

is

connected

to the

various sensors through

the

Intelligent Platform Management

Bus

(IPMB),

a subset of the I2C bus.

System software communicates

with

BMC

using a

keyboard

controller

style

(KCS)

interface.

BMC Key Features and Functions

Following

are the

supported features

of the BMC:

• IPMI v2.0.

•

Out-of-band monitoring

and

control

for server

management

over LAN.

•

Dedicated 10/100

NIC for

remote management

over a network.

•

Information report including

main

board

part

number, product name, manufacturer,

etc.

•

Health status/hardware monitoring

report.

•

Events

log, view, and clear.

•

Event notification

using

chassis

LED

indicator

and

Platform Event

Trap (PET).

•

Platform Event Filtering (PEF)

to take

selected action

for

selected events, including

non-

masking interrupt (NMI)

and

system management interrupt

(SMI).

•

Chassis management including power control

and status

report,

front panel

buttons,

LED

control, Secure Mode,

and Boot

Option.

•

Watchdog

and auto

server re-start

and recovery.

•

Multi-session

user and alert

destination

for LAN channel.

• IPMB

connector

to

enable advanced server management communication

with BMC.

• DCMI v1.0/Node Manager v1.5.

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