Flexible Nodal Layer 3 Overlay for Wi-Fi Traffic
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Solution Overview
Problem
Commercial Wi-Fi implementations face challenges in executing site-specific network requirements, such as custom traffic filtering and re-direct features, once layer 2 traffic is encapsulated in layer 3 tunneling space, limiting the flexible and configurable placement of layer 3 tunnel endpoints within a site.
Innovation Solution
The implementation of a flexible nodal layer 3 overlay system that provisions a layer 2 access device and a layer 3 device for encapsulation and transmission of layer 2 packets over a layer 3 tunnel, allowing for the instantiation of a first layer 3 tunnel endpoint as a flexible layer 2-layer 3 demarcation line with respect to a layer 2 inspection device, and a second endpoint at a network gateway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If layer 2 traffic is encapsulated in layer 3 tunneling space, then transmission across networks is simplified, but site-specific network requirements cannot be executed
Solution Approach 1:
The patent segments the tunneling function into distributed tunnel endpoints deployed at multiple locations within the network (e.g., at network edges, access points, or intermediate devices) rather than a single centralized point. This segmentation allows different segments of the network to apply site-specific policies locally while maintaining overall tunneling functionality, thus resolving the contradiction between simplified transmission and adaptability to local requirements.
Solution Approach 2:
The patent introduces a new dimension of flexibility by allowing tunnel endpoints to be positioned at multiple hierarchical levels and geographic locations within the network architecture. This multi-dimensional deployment enables site-specific requirements to be addressed at appropriate network layers while maintaining the benefits of layer 3 tunneling for cross-network transmission.
2Device complexity
If tunnel endpoints are centralized at network gateway, then architecture is simplified, but flexible placement of tunnel endpoints within site is limited
Solution Approach 1:
The patent creates universal tunnel endpoint devices that can function in multiple roles and locations throughout the network. These multi-functional endpoints can operate at network edges, intermediate points, or centralized locations, providing both architectural simplicity through standardized devices and placement flexibility through their ability to deploy anywhere in the network hierarchy.
Solution Approach 2:
The patent implements dynamic tunnel endpoint positioning where endpoints can be provisioned, moved, or scaled to different locations within the site based on changing network requirements. This dynamic capability allows the architecture to maintain simplicity while adapting endpoint placement flexibility to various operational scenarios.
Data Source
AI summary
Methods and systems for flexible nodal layer 3 overlay of layer 2 traffic is described. A network includes an access device for receiving layer 2 traffic from user devices, a packet inspection device for inspecting the layer 2 traffic, and a layer 3 tunnel instantiation device for encapsulating the layer 2 traffic into layer 3 traffic. The layer 3 tunnel instantiation device provides a first tunnel endpoint for a layer 3 tunnel, which is connected to a second tunnel endpoint instantiated at a network gateway. The layer 3 tunnel instantiation device establishes a moveable demarcation between a layer 2 domain and a layer 3 domain with respect to the packet inspection device, where the access device and the packet inspection device operate in the layer 2 domain. The layer 3 traffic is transmitted over the layer 3 tunnel.