RADIUS Log Analysis for PPP Session Failure Detection
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Solution Overview
Problem
Current network monitoring systems are inadequate for detecting all network failures, particularly in complex scenarios, and often introduce delays due to cyclic scanning or lack reliability in asynchronous monitoring, which can impact service continuity and user trust.
Innovation Solution
A method that utilizes data from RADIUS servers within PPP sessions to detect network failures by correlating data in real-time, performing analysis on RADIUS server logs, and generating alarms through multiple protocols, allowing for immediate action and rebooting of resources to restore services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclic monitoring is used, then reliability of detection is improved, but detection delay increases
Solution Approach 1:
The system performs preliminary actions by proactively initiating PPP sessions before failures occur and establishing baseline connectivity patterns. This allows the system to detect anomalies when sessions fail to establish or behave abnormally, enabling earlier detection without waiting for cyclic monitoring intervals while maintaining reliable detection through predefined session parameters and thresholds.
2Speed
If asynchronous monitoring is used, then detection speed is improved, but reliability decreases
Solution Approach 1:
The system implements feedback mechanisms by continuously monitoring PPP session establishment responses and accounting information from RADIUS servers. When asynchronous events are detected, the system verifies them through multiple data sources and cross-checks session states, providing feedback validation that ensures reliable detection while maintaining fast response times through event-driven architecture.
3Ease of operation
If standard monitoring systems are used, then ease of operation is improved, but detection capability is insufficient
Solution Approach 1:
The system achieves universality by integrating multiple monitoring functions into a single platform that combines PPP session management, RADIUS accounting analysis, and failure detection capabilities. This multi-functional approach enables the system to detect various types of failures (access network, aggregation network, service-level) while maintaining ease of operation through unified configuration and centralized management interfaces.
4Adaptability or versatility
If multiple network management systems are used, then coverage of different devices is improved, but system complexity increases
Solution Approach 1:
The system merges multiple monitoring functions and data sources into a unified architecture that consolidates PPP session monitoring, RADIUS accounting analysis, and failure detection into a single system. This combining approach maintains comprehensive device coverage by supporting multiple vendors and device types while reducing overall system complexity through centralized management and integrated data processing.
Data Source
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AI summary
The invention relates to a method for detecting network failures, in which data from RADIUS server logs are received and recorded (1), and after the analysis (2) of the recorded data, disconnections of PPP sessions passing through a specific network resource at a set time are detected (3). Next, disconnections of PPP sessions are verified (5); and when verification (5) of disconnection of PPP sessions is positive, an alarm is generated (8) to a maintenance system and/or users are notified (9). Then, it is verified (10) whether the maximum waiting time for the return of PPP sessions was exceeded, and threshold value of the number of re-established PPP sessions is verified (11). Depending on whether the verification (10, 11) is positive/negative, the users are notified (13) and/or alarm is turned on (14) or verification of the number of established PPP sessions is ended (12).