BMC Wireless Proxy Channel for Wired Link Failure

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Solution Overview

Problem

Existing information handling systems face challenges in maintaining secure and reliable connections between management controllers, particularly when wired connections are disrupted, leading to potential security vulnerabilities and management disruptions.

Innovation Solution

The system employs first and second baseboard management controllers (BMCs) with wireless interfaces, allowing for automatic establishment of a wireless link between them in case of wired interface uncoupling, and utilizes whitelists and shared encryption keys for secure authentication and communication, enabling secure proxy channels for management traffic.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wired connections are used between BMC and management system, then connection stability is improved, but system resilience to connection failures deteriorates

Engineering Contradiction:

Improveconnection stabilityVSAvoidresilience to connection failures

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system dynamically switches between wired and wireless connection modes based on connection status. When the wired connection between BMC and management system fails, the system automatically transitions to wireless mode, and when wired connection is restored, it switches back. This dynamic adaptability resolves the contradiction by maintaining connection stability through wired links while providing resilience through automatic fallback to wireless connections.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A wireless communication interface acts as an intermediary backup channel between BMC and management system. This intermediary wireless path provides an alternative communication route when the primary wired connection fails, thereby improving system resilience without compromising the stability of the primary wired connection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If wireless backup connection is established, then system resilience is improved, but security vulnerability increases

Engineering Contradiction:

Improvesystem resilienceVSAvoidsecurity vulnerability

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Security credentials including encryption keys and authentication certificates are pre-configured in the BMC before wireless connection is needed. This preliminary setup ensures that when wireless connection is established as a backup, security is already in place, preventing security vulnerabilities that would arise from ad-hoc security configuration.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces physical wired connection with wireless communication for the backup path. By using encrypted wireless protocols and digital authentication mechanisms instead of physical connection, the system achieves both resilience and security, substituting the mechanical wired connection with a digitally secured wireless alternative.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If automatic wireless connection is implemented, then management continuity is improved, but device complexity increases

Engineering Contradiction:

Improvemanagement continuityVSAvoidconnection management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The BMC performs automatic detection of wired connection status and autonomously initiates wireless connection establishment without external intervention. The system self-manages the entire process including detecting wired connection failure, activating wireless interface, establishing wireless link, and restoring management continuity, thereby improving productivity while minimizing the operational complexity burden on users.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10383157B2System and method for automatic wireless connections between server management controllers to set up a secure proxy channel

Publication Date: 2019.08.13 DELL PROD LP

AI summary

An information handling system includes a management system and first and second first baseboard management controllers (BMCs). The first BMC includes a first wireless interface, and is coupled via a first wired interface to the management system. The second BMC includes a second wireless interface, and is coupled via a second wired interface to the management system. The information handling system detects that the BMC has become uncoupled from the management system via the first wired interface, establishes a wireless link between the first wireless interface and the second wireless interface in response to detecting that the first BMC has become uncoupled from the management system, and provides management between the first BMC and the management system via the second wired interface and the wireless link.