Dynamic Traffic Redirection in Distributed Tunnel Fabric

The patent implements dynamic path cost adjustment in the routing process. When events occur at participating switches (such as link failures or congestion), the affected switch advertises updated path costs to neighboring switches, causing the routing protocol to dynamically recalculate and redirect traffic through alternative paths. This transforms the static routing table into a dynamic system that adapts to real-time network conditions, resolving the contradiction between routing simplicity and traffic efficiency.

The patent implements a feedback mechanism where participating switches continuously monitor network events and automatically advertise path cost changes to neighboring switches through the routing protocol. When an event occurs (such as link failure or congestion), the affected switch detects the event, calculates new path costs, and propagates this information throughout the network. This feedback loop enables the network to automatically adapt to dynamic events while maintaining stability through controlled, protocol-based adjustments, resolving the contradiction between manual configuration stability and event-driven adaptability.

The patent changes the parameter being optimized from static path selection to dynamic path cost adjustment. Instead of manually configuring complex routing policies or implementing sophisticated traffic engineering protocols, the system simply dynamically adjusts the path cost parameter in the routing protocol based on event conditions. This parameter change approach allows efficient traffic redirection by leveraging existing routing protocol mechanisms, resolving the contradiction between traffic redirection efficiency and routing process complexity by using a simple parameter-based solution rather than complex algorithmic changes.