SD-WAN TOS Path Selection to Reduce Routing Rule Complexity
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Solution Overview
Problem
Current SD-WAN routing strategies face challenges in complexity and expertise requirements for rule configuration, leading to operational inefficiencies and suboptimal Quality of Service (QoS) due to the need for numerous rules and reliance on administrator expertise.
Innovation Solution
A TOS-based approach for per-application path selection in SD-WAN, utilizing TOS parameters to determine SD-WAN link quality and select optimal routes based on jitter, latency, and packet loss, simplifying rule configuration and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional SD-WAN routing strategies use specific rules for each application with metrics such as packet loss, latency, and jitter, then routing precision for each application can be improved, but the number of rules and configuration complexity increases significantly
Solution Approach 1:
The patent changes the parameter basis from multiple separate metrics (packet loss, latency, jitter) to a single TOS parameter that encapsulates quality of service information. This allows the system to maintain precise routing decisions while reducing the number of configuration parameters from thousands of individual rules to a unified TOS-based selection mechanism.
2Adaptability or versatility
If SD-WAN rule configuration relies on network administrators' experiences and expertise, then customization flexibility can be improved, but the skill requirement and operational difficulty increase
Solution Approach 1:
The patent implements self-service by allowing the system to automatically extract TOS parameters from packet headers and make routing decisions autonomously. The system no longer requires network administrators to manually configure complex rules for each application, instead automatically interpreting TOS values and selecting appropriate paths based on real-time link quality measurements.
3Measurement precision
If traditional SD-WAN rules are created for each application with specific metrics, then application-specific routing accuracy can be improved, but the time required for rule configuration and management increases
Solution Approach 1:
The patent applies preliminary action by pre-defining TOS parameter mappings and link quality measurement mechanisms before routing decisions are needed. The system pre-establishes the framework for extracting TOS values from packet headers and measuring link quality metrics, allowing rapid routing decisions without time-consuming manual rule creation for each application.
Data Source
AI summary
An SD-WAN route is selected based on the TOS parameters matching real-time SD-WAN link quality requirement by matching jitter, latency and/or packet loss requirements of TOS parameters to highest ranking links over a route. The TOS parameters for a specific application can be parsed from data traffic and matched to optimal SD-WAN routes. The data traffic of the first data packet and subsequent data packets of the first session is output to the selected SD-WAN link.