TGW Route Re-Origin Tagging for Device Group Routing Control
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Solution Overview
Problem
Existing SD-WAN architectures lack the flexibility to intelligently and selectively tag re-originated data traffic routes, especially in environments with varying network traffic patterns, leading to inefficiencies and potential disruptions in data routing.
Innovation Solution
Implementing Transport Gateways (TGWs) that utilize device group identifiers to manage and filter data traffic, allowing for intelligent routing and security by configuring dedicated or shared TGWs with or without inter-device group routing capabilities, ensuring compliance with symmetry and full mesh topologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If device group identifiers are introduced for routing control, then routing precision and security are improved, but device complexity increases
Solution Approach 1:
The patent introduces a Transport Gateway (TGW) as an intermediary component that handles device group identifier tagging and routing control. The TGW acts as a mediator between branch devices and the routing controller, absorbing the complexity of identifier management and routing decisions, thereby improving routing precision without significantly increasing the complexity of individual branch devices.
Solution Approach 2:
The routing control function is segmented into separate components: branch devices generate traffic, the Transport Gateway handles identifier tagging and filtering, and the routing controller manages overall routing policies. This segmentation allows each component to focus on specific tasks, improving routing precision while distributing complexity across the network architecture.
2Reliability
If Transport Gateways are deployed for traffic filtering, then network security is improved, but device complexity increases
Solution Approach 1:
The Transport Gateway is designed as a multi-functional component that performs multiple operations including traffic filtering, device group identifier tagging, route validation, and protocol translation. By consolidating these functions into a single universal device, the patent improves network security without requiring multiple specialized devices, thereby managing complexity effectively.
Solution Approach 2:
The Transport Gateway serves as an intermediary security layer between branch devices and the core network. It filters and validates traffic based on device group identifiers before allowing access to the routing controller and cloud destinations, thereby enhancing network security while centralizing complexity management.
3Productivity
If dedicated TGWs are configured for each device group, then routing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the network into device groups, each with its own dedicated Transport Gateway. This segmentation allows for isolated routing control and optimized traffic handling for each group, improving routing efficiency. The segmentation is implemented through logical configuration rather than physical isolation, managing complexity through software-based group management.
Solution Approach 2:
The Transport Gateway configuration is made dynamic, allowing device groups to be created, modified, and deleted through software control. This dynamic configuration enables efficient routing adaptation to changing network requirements without requiring physical reconfiguration, thereby improving routing efficiency while managing complexity through programmable control.
4Device complexity
If shared TGWs are used across multiple device groups, then device complexity is reduced, but routing precision deteriorates
Solution Approach 1:
The patent implements local quality by allowing shared Transport Gateways to maintain separate routing tables and filtering rules for different device groups. Each device group receives customized routing treatment tailored to its specific requirements, while the shared TGW infrastructure reduces overall device complexity. The local quality is achieved through software-configured group-specific policies within the shared platform.
Data Source
AI summary
Techniques for routing in a software-defined wide area network (SD-WAN) are disclosed herein. In some aspects, the techniques described herein relate to configuring, by a routing controller, at least one data traffic route originating from a device of a first group of devices to a first Transport Gateway (TGW) and a gateway hub, tagging the at least one data traffic route with a first identifier associated with the first group of devices to send to the first TGW and to a first set of routers of the hub gateway wherein the at least one data traffic route originates from at least one device of the first group of devices, and sending a tagged data traffic route originating from at least one device of the first group of devices based on the first identifier to the first TGW and the first set of routers of the hub gateway.