Remote Management Controller Reset via Power Over Ethernet
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Solution Overview
Problem
Existing methods for resetting a management controller in information handling systems often require manual intervention, which is undesirable, especially when the system is powered off or in a standby state.
Innovation Solution
The system includes a processor and logic devices that monitor a power-over-Ethernet input to detect a request for remote reset, allowing for automated resetting of the management controller via a power-over-Ethernet interface, even when the host system is powered off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual powering off and powering on of the management controller is performed, then the management controller can be reset, but it requires physical presence at the information handling system and manual intervention
Solution Approach 1:
The management controller is configured to automatically detect and respond to power cycle commands received through the network interface. When a reset command is received via the in-band network interface, the management controller self-initiates the power cycle sequence without requiring manual physical intervention, thereby enabling automated remote reset operations
Solution Approach 2:
The patent introduces an intermediary communication mechanism where reset commands are transmitted through the in-band network interface and processed by the management controller's processor. This intermediary allows remote initiation of reset operations without requiring physical access to the system, bridging the gap between remote operators and the management controller
2Reliability
If the management controller is reset manually, then the reset can be performed, but it cannot be done when the system is powered off or in standby state
Solution Approach 1:
The management controller maintains a persistent power supply through its dedicated power connection, allowing it to remain operational and responsive even when the host system is powered off or in standby state. This preliminary preparation ensures the management controller can receive and process reset commands at any system power state
Solution Approach 2:
The patent separates the management controller's power supply from the host system's power cycle. The management controller has its own independent power connection that allows it to remain active while the host system is powered down, enabling reset operations independent of the host system's power state
3Adaptability or versatility
If the management controller uses an out-of-band network interface, then it can provide management when the system is powered off, but it requires separate physical isolation from the in-band interface
Solution Approach 1:
The management controller is equipped with both in-band and out-of-band network interfaces, allowing it to perform management functions through multiple communication paths. The controller can selectively use either interface depending on the operational context, providing universal management capability across different system states and scenarios
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables remote and automated reset of the management controller, reducing the need for manual intervention and ensuring out-of-band management capabilities even when the system is in a powered-off state.
Implementation Method 1
a power-over-Ethernet detection circuit coupled to the power-over-Ethernet input and configured to detect a voltage level or other electrical parameter of a power-over-Ethernet voltage
Data Source
AI summary
In accordance with embodiments of the present disclosure, an information handling system may include a processor, a management controller communicatively coupled to the processor and configured to provide out-of-band management of the information handling system, and one or more logic devices. The one or more logic devices may be configured to monitor a power-over-Ethernet input of a network interface communicatively coupled to the one or more logic devices in order to detect an indication at the power-over-Ethernet input of a request to remotely reset the management controller and, responsive to determining presence of the indication at the power-over-Ethernet input of the request to remotely reset the management controller, cause a reset of the management controller.