Baseboard Management Controller

Definition of Baseboard Management Controller

The Baseboard Management Controller (BMC) is a specialized microcontroller embedded within a server or computer system’s motherboard. It enables remote monitoring, management, and maintenance of the system’s health, even when the system is powered off or unresponsive. This out-of-band management tool provides administrators with access to functions such as power control, firmware updates, and hardware diagnostics.


The phonetic pronunciation of the keyword “Baseboard Management Controller” can be represented as follows:- Baseboard: ˈbeɪsˌbɔːrd- Management: ˈmænɪdʒmənt- Controller: kənˈtroʊlərIn the International Phonetic Alphabet (IPA):- Baseboard: /ˈbeɪsˌbɔːrd/- Management: /ˈmænɪdʒmənt/- Controller: /kənˈtroʊlər/

Key Takeaways

  1. A Baseboard Management Controller (BMC) is a specialized service processor that monitors, manages, and controls the state of a computer’s hardware components by providing an independent interface for out-of-band management.
  2. BMC provides valuable functions such as remote monitoring of system health and event notifications, remote power management and diagnostics, and firmware updates, without the need for an operating system or power to be on.
  3. Since BMC operates independently from the system’s main processor, it offers greater security, reliability, and resilience for remote and emergency management, making it crucial for server management in data centers and other critical IT environments.

Importance of Baseboard Management Controller

The Baseboard Management Controller (BMC) is an essential component in server management, as it provides remote monitoring and control functionalities for server hardware.

It is important because it allows administrators to access, monitor, and manage servers remotely, regardless of the operating system or the system’s power state.

This enhanced manageability ensures that servers operate efficiently, optimally, and securely while enabling streamlined maintenance processes, better identification of potential problems, and faster resolution of hardware-related issues.

Overall, the BMC significantly contributes to the reliability, availability, and serviceability of a data center’s infrastructure.


The Baseboard Management Controller (BMC) serves as a crucial component in modern server and IT infrastructure management, as it facilitates monitoring and controlling of hardware components. This autonomous subsystem is embedded on a server motherboard and operates independently of the main system, ensuring administrators can remotely obtain system diagnostics, view event logs, and oversee parameters like temperature, fan speed, and voltage.

Consequently, it serves to simplify the management of large-scale server environments, particularly in data centers, where swiftly identifying and resolving issues is essential to maintaining optimal system performance and preventing costly downtime. One notable aspect of BMC is its ability to give administrators round-the-clock access to the system regardless of its power state or the operating system.

By leveraging the Intelligent Platform Management Interface (IPMI) standard, the BMC allows for remote power control, resetting, and even reinstallation of the server’s operating system without the need for physical presence. This proves particularly invaluable for IT personnel managing multiple servers, as it allows them to perform routine maintenance, troubleshoot issues, and apply firmware updates in a prompt and efficient manner.

As a result, the incorporation of Baseboard Management Controllers into server systems streamlines overall management and enhances both reliability and availability of essential IT services.

Examples of Baseboard Management Controller

Example 1:

Data Center Management: In many data centers around the world, Baseboard Management Controllers (BMCs) are widely used to remotely monitor and manage the status of servers and other IT hardware. IT administrators can access the BMC’s web interface to check on the health of the devices, including monitoring CPU and RAM usage, temperature, fan speeds, and power supply status. They can also reboot or shut down servers in case of any issues, all without being physically present at the location.

Example 2:

Troubleshooting Hardware Issues: When a hardware issue occurs in a server, it can be both time-consuming and costly for an IT professional to physically visit the server room and diagnose the problem. A BMC allows them to remotely identify the specific cause of the problem, such as a failing fan, high system temperature, or power supply issue. By pinpointing the exact issue, the IT professional can quickly resolve the problem or dispatch the appropriate personnel with the necessary replacement parts, minimizing downtime and interruptions to business operations.

Example 3:

Out-of-band Management: In situations where a server or network device becomes unresponsive or has problems at the operating system level, the Baseboard Management Controller provides out-of-band management as a way to remotely gain low-level control over the hardware. This allows IT staff to perform actions such as force-rebooting the server, accessing the BIOS, or reinstalling the operating system. Using the BMC, these tasks can be completed without direct physical interaction with the server, enabling quicker resolution of issues, even when the systems are geographically distant from the IT team.

Baseboard Management Controller

What is a Baseboard Management Controller?

A Baseboard Management Controller (BMC) is a specialized microcontroller embedded in a computer’s motherboard. It acts as the brain of the system’s monitoring, remote management, and other auxiliary functions, making it an integral component for server management.

What are the main features of BMCs?

BMCs are designed to provide out-of-band remote access and monitoring of server hardware, including system health, temperature, power consumption, and system logs. They also offer remote control functionalities like power cycling, system reset, virtual media management, and BIOS configuration, enabling efficient and easier management of server systems remotely.

Why is a Baseboard Management Controller important?

BMCs are essential for IT administrators who need to manage and monitor large numbers of servers in data centers or remote sites. They ensure that system administrators can troubleshoot, diagnose, and resolve issues in a fast and efficient manner without needing physical access to the servers, thereby reducing downtime and increasing overall system availability.

How does a Baseboard Management Controller work?

A BMC communicates with various sensors and hardware components in a server system to gather information about temperature, power usage, and other critical metrics. It operates independently of the main system, allowing remote access even when the server is powered off or experiencing issues. Administrators can then access the information provided by the BMC through a dedicated management network or via a web-based user interface, enabling them to make informed decisions and perform necessary actions remotely.

What protocols and interfaces do BMCs support?

BMCs typically support several standardized protocols and interfaces for remote management, including IPMI (Intelligent Platform Management Interface), SNMP (Simple Network Management Protocol), and Redfish, among others. These protocols allow IT administrators to interact with the BMC using various tools and applications, such as web-based user interfaces and command-line utilities.

Related Technology Terms

  • Out-of-Band Management
  • Intelligent Platform Management Interface (IPMI)
  • Remote Management
  • IP-based KVM Switch
  • Server Hardware Monitoring

Sources for More Information


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