SD-WAN SRv6 Path Selection with IFIT Quality Synchronization
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Solution Overview
Problem
The inability to implement distributed end-to-end intelligent policy routing in Software-Defined Wide Area Network (SDWAN) SRv6 environments due to heterogeneous start and end point devices from different manufacturers, leading to inefficiencies and failure in quality path selection.
Innovation Solution
A path selecting method and apparatus that utilizes a software-defined wide area network end-to-end policy, enabling tunnel-based In-situ Flow Information Telemetry (IFIT) quality detection and synchronization of binding segment identifier (BSID) information across devices from different manufacturers, facilitating distributed end-to-end policy routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed intelligent policy routing is implemented in SDWAN SRv6 networks, then traffic scheduling timeliness and scalability are improved, but implementation fails due to heterogeneous devices from different manufacturers
Solution Approach 1:
The patent introduces a standardized IFIT detection mechanism as an intermediary layer between heterogeneous devices. This mechanism uses统一的检测协议 and data formats, allowing devices from different manufacturers to exchange path quality information reliably. The intermediary standardizes the interaction interface, resolving the compatibility issue while maintaining distributed routing's timeliness benefits.
Solution Approach 2:
The patent applies homogeneity by standardizing the IFIT detection data structures, message formats, and detection protocols across heterogeneous devices. By making the detection mechanism homogeneous while allowing device diversity, the system achieves both scalability and reliable path selection across multi-vendor environments.
2Adaptability or versatility
If traditional centralized WAN scheduling scheme is used, then device compatibility is maintained, but the number of policies becomes unmanageably large and scheduling timeliness deteriorates
Solution Approach 1:
The patent segments the policy management function: the controller handles policy generation and distribution, while local devices perform autonomous path selection based on received policies. This segmentation reduces the policy burden on individual devices and improves scheduling timeliness through distributed decision-making, while maintaining compatibility through standardized interfaces.
Solution Approach 2:
The standardized IFIT detection mechanism acts as an intermediary that enables distributed policy execution across heterogeneous devices. It provides a common language for path quality reporting, allowing the segmented architecture to function seamlessly across multi-vendor environments.
3Measurement precision
If end-to-end path quality detection is enabled across multiple domains, then path selection accuracy is improved, but information synchronization complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where IFIT detection results are continuously collected from multiple domains and fed back to the controller. The controller aggregates this feedback information and uses it for end-to-end path quality assessment and policy optimization. This feedback loop improves path selection accuracy while the centralized aggregation manages synchronization complexity.
Solution Approach 2:
The standardized IFIT detection protocol serves as an intermediary that simplifies information synchronization across domain boundaries. By providing统一的 data formats and detection methods, it reduces the complexity of integrating quality information from multiple domains while maintaining high measurement precision.
Data Source
AI summary
The present disclosure provides a path selecting method and apparatus based on a software-defined wide area network distributed end-to-end policy and a device, to solve the technical problem that distributed end-to-end intelligent policy routing cannot be realized due to heterogeneous start and end points. The present disclosure provides a device with a tunnel-based IFIT quality detection function and the ability to support specifying end point parameters, takes the controller as a bridge for synchronizing quality detection information of the blinding segment identifier BSID, and facilitates the interaction of quality detection information between devices from different manufacturers, thereby achieving distributed end-to-end policy routing in the SDWAN Srv6 networking environment.