Multi-tier Network Flow Management Architecture

The patent segments the packet transformation function into distinct network elements: service function chains (SFCs) that define transformation sequences, and network virtualization layer (NVL) components that execute them. This segmentation allows flexible configuration of transformation rules through SFC descriptors while maintaining scalability by distributing execution across multiple NVL nodes, preventing any single point from becoming a bottleneck in large provider networks.

The patent implements a universal service function chain framework that can handle multiple types of network transformations (address manipulation, packet routing, load balancing, etc.) through a single standardized mechanism. The SFC descriptor language provides a unified way to define diverse transformation requirements, while the NVL executes different transformation types using common infrastructure components, reducing network management complexity despite supporting multiple customer-specific processing requirements.

The patent applies preliminary action by pre-configuring service function chains with their transformation rules and state management parameters before packets arrive. The NVL nodes preload SFC descriptors and establish processing pipelines in advance, allowing packets to flow through pre-established stateful processing paths. This reduces per-packet processing overhead while maintaining the benefits of stateful application performance monitoring and consistent packet handling.