IPMI & BMC

  • Intelligent Platform Management Interface

  • IPMI is a specifications that provides standardized hardware interfaces and abstraction

  • 1998 v1.0, 2001 v1.5, 2004 v2.0

  • The primary IPMI features include:

    • Monitoring (supervision of the hardware)
    • Recovery Control (Recover/Restart the server)
    • Logging (protocol "out-of-range" states for the hardware)
    • Inventory (list of hardware inventory)

  • Avaiable even if system is powered down and no OS loaded

  • IPMI Components

    • BMC (Baseboard Management Controller): The heart of IPMI
    • IPMB (Intelligent Platform Management Bus)
    • ICMB (Intelligent Chassis Management Bus)

  • Some Data Types

    • SEL (System Event Logging)
    • SDR (Sensor Data Record)
    • Sensor
    • FRU (Field Replaceable Unit)

  • System Interfaces

    • KCS
    • Lan
    • Others (Serial, ...)

  • SOL (Serial Over LAN): Redirect data traffic to BMC serial port through an IPMI session

  • Disadvantage

    • Insecure

    • Lots of OEM commands

    • Scability problems

  • Reference

Redfish

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