SD-WAN Route Distribution Using Transport Compatibility Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
SD-WAN controllers indiscriminately distribute routes that are often not compatible with the configurations of edge network devices, leading to unusable paths and scalability issues due to the need to send a high number of non-viable paths to ensure viable paths are received, which increases computational load and stability problems.
Innovation Solution
The SD-WAN controller uses a transport compatibility matrix and heuristics to determine compatible routes based on tunnel-group-IDs, transport colors, and color-restrict settings, intelligently selecting routes for distribution that account for route viability conditions, reducing the need for a high send-path-limit and minimizing non-viable paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SD-WAN controller distributes a high number of routes to ensure viable paths are received, then the likelihood of receiving viable paths improves, but the computational load and memory usage increase
Solution Approach 1:
The SD-WAN controller performs preliminary filtering of routes based on transport compatibility criteria (transport colors, tunnel-group-IDs, color-restrict settings) before distributing routes to edge network devices. This preliminary action ensures that only potentially viable routes are distributed, eliminating the need to distribute excessive routes and reducing computational load while maintaining reliability
2Reliability
If the SD-WAN controller distributes a high number of routes to ensure viable paths are received, then the likelihood of receiving viable paths improves, but the scalability deteriorates
Solution Approach 1:
The controller pre-evaluates route compatibility using transport compatibility criteria before distribution, enabling scalable operation by reducing the route set to only those likely to be viable, thus maintaining reliability while improving scalability
3Ease of operation
If the SD-WAN controller distributes routes without filtering, then the distribution process is simple, but many non-viable paths are distributed causing stability problems
Solution Approach 1:
The controller applies transport compatibility filtering (based on transport colors, tunnel-group-IDs, and color-restrict settings) as a preliminary step before route distribution. This maintains operational simplicity while significantly improving network stability by preventing distribution of non-viable paths
Data Source
AI summary
The present technology intelligently selects routes to be distributed to edge network device from SD-WAN controllers. Rather than indiscriminately distributing routes, the present technology utilizes logic to account for route viability conditions to determine whether a route between a first edge network device and a second edge network device is likely to be usable between the edge network devices.