Switch Device Silent Failure Detection via LLDP and Ping
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Solution Overview
Problem
Silent failures in network switches go undetected, leading to network breakdowns, as malfunctioning switches discard packets without being recognized, causing delays in failure identification and recovery, especially in large and complex data center networks.
Innovation Solution
A switch device with a processor and memory that identifies adjacent switches using operable functions, confirms communication, and determines silent failures by analyzing LLDP and ping responses, allowing for efficient monitoring and route switching without interrupting communication, and automatically separates affected routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switch device operates with basic communication relay functions, then network communication is maintained, but silent failures go undetected causing network breakdowns
Solution Approach 1:
The switch device performs preliminary failure detection actions by transmitting LLDP packets and ping packets to adjacent switches before normal communication is affected. This proactive approach identifies potential failures in the communication unit before they cause silent failures, allowing preventive maintenance or route switching.
Solution Approach 2:
The system establishes feedback loops where the switch continuously monitors communication status by receiving LLDP packets and ping responses from adjacent switches. When no response is received, the system detects a silent failure and triggers appropriate actions such as notifying network management systems or switching routes.
2Loss of time
If the switch continuously monitors communication status, then silent failures are detected quickly, but network traffic and processing load increase
Solution Approach 1:
The monitoring system utilizes existing standardized protocols (LLDP and ping) that are already widely deployed in network infrastructure. By leveraging these universal protocols, the switch can perform failure detection without requiring specialized monitoring hardware or protocols, thus minimizing additional processing overhead while maintaining effective surveillance.
Solution Approach 2:
The switch device performs self-diagnosis by using its own communication unit to transmit and receive test packets. The system monitors its own operational status independently, reducing the need for external monitoring infrastructure and minimizing overall network processing load while maintaining continuous surveillance capability.
3Measurement precision
If the switch uses additional protocols for failure detection, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The system achieves high detection accuracy by combining two widely-standardized protocols (LLDP for layer 2 adjacency detection and ping for layer 3 connectivity verification) rather than implementing a single complex proprietary protocol. This multi-functional approach leverages existing protocol stacks already present in modern switches, avoiding the need for additional specialized detection mechanisms.
Data Source
AI summary
A switch device includes: a memory; and a processor coupled to the memory and configured to: identify an adjacent switch device using a function that is operable even when a function of relaying communication is inoperable; confirm communication with the adjacent switch device which is identified, by using the function of relaying communication; and determine whether or not there is a silent failure in the switch device, based on a result of the communication confirmation.