BGP Route Detection via BMP Session Comparison

The patent segments the BGP route detection process into multiple independent BMP sessions. Each BMP session is established between a controller and a network device to monitor specific route information. This segmentation allows the system to detect route validity by comparing routes advertised by different network devices independently, resolving the contradiction between general monitoring capability and specific route validity detection.

The patent introduces an intermediary mechanism where the controller acts as a mediator to compare BGP routes received from different network devices. The controller receives first BGP routes from first network devices and second BGP routes from second network devices, then compares them to detect unavailable routes. This intermediary approach enables route validity detection without requiring direct peer-to-peer monitoring between network devices.

The patent applies universality by designing a multi-functional BMP session management system. The same BMP protocol framework is used to achieve multiple objectives: monitoring BGP running status, collecting BGP route sets from multiple network devices, comparing routes for validity detection, and triggering notifications. This multi-functionality reduces the need for separate specialized mechanisms, thereby managing complexity while improving detection capability.

The patent implements feedback mechanisms where the controller continuously receives BGP route information from network devices, compares it with previously stored route sets, and triggers notifications when route unavailability is detected. This feedback loop enables automatic detection and response to route changes, simplifying the overall system operation despite the multiple BMP sessions required for comprehensive monitoring.