Stack Link Fault Response Engine for Network Switches
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Solution Overview
Problem
Conventional stacked information handling systems fail to accurately detect degraded Inter-Switch Links (ISLs), leading to potential communications failures as devices remain unaware of performance issues, causing dropped communications even when a subset of stack links are unavailable.
Innovation Solution
An Information Handling System (IHS) with a stack link fault response engine that monitors and determines the availability of stack links, performing actions to prevent communication drops by rerouting or limiting traffic when a subset of links is unavailable, even if others remain operational.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stacked systems report ISL as either up or down, then the system structure is simple, but communication failures occur when a subset of stack links fail
Solution Approach 1:
The patent segments the ISL into individual stack links and introduces a stack link fault response engine that monitors each link's operational status independently. This allows the system to detect when a subset of stack links fail while others remain operational, enabling granular fault detection without requiring complete ISL failure. The engine divides the fault detection task into per-link monitoring, resolving the contradiction between simple binary reporting and reliable communication.
2Productivity
If the system continues to route traffic through degraded ISL, then bandwidth utilization is maintained, but communication drops occur
Solution Approach 1:
The patent implements dynamic traffic routing by introducing a stack link fault response engine that continuously monitors stack link status and adjusts traffic routing in real-time. When degradation is detected, the system dynamically redirects traffic through alternative paths or reduces traffic load on degraded links. This dynamic adaptation maintains productivity by utilizing available bandwidth while preventing communication drops through intelligent traffic management.
Solution Approach 2:
The system employs feedback mechanisms where the stack link fault response engine continuously monitors the operational status of stack links and uses this information to adjust traffic routing decisions. The engine receives feedback about link degradation and responds by modifying traffic patterns, thereby maintaining communication reliability while optimizing bandwidth utilization based on current link conditions.
Data Source
AI summary
A stack link fault response system includes a connected device, a first networking device, and a second networking device that is coupled to the connected device by first connected device link(s), and to the first networking device by stack links. The second networking device uses the stack links to transmit connected device communications received through the first connected device link(s) from the connected device. When the second networking device determines that a subset of the stack links are unavailable to transmit communications while at least one of the stack links is available to transmit communications, it performs a stack link fault response action that is configured to prevent the connected device from sending at least a portion of the connected device communications through the first connected device link(s) to the second networking device.