OMP-Based MVPN Route Exchange With Local Leaf A-D Generation
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Solution Overview
Problem
Existing SD-WAN implementations face challenges in optimizing multicast route exchange due to complex signaling and unnecessary state propagation, particularly with replicators and controllers, leading to increased control plane overhead and reduced scalability.
Innovation Solution
The method involves leveraging Overlay Management Protocol (OMP) to optimize MVPN route exchange by dropping unnecessary S-PMSI messages, generating Leaf A-D routes based on joins and withdrawals, and using internal logic to manage route exchange information locally, reducing the need for central controller communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional MVPN route exchange protocols are used in SD-WAN environments, then multicast service functionality is provided, but control plane overhead increases and scalability deteriorates
Solution Approach 1:
The patent extracts and removes unnecessary S-PMSI message exchanges from the SD-WAN multicast implementation. By identifying that S-PMSI messages are not needed in the OMP-based SD-WAN architecture, the invention eliminates these redundant signaling messages, thereby reducing control plane overhead while preserving multicast service functionality through alternative route exchange mechanisms
Solution Approach 2:
The patent changes the operational parameters of route exchange by modifying how Leaf A-D routes are generated and propagated. Instead of relying on traditional S-PMSI signaling, the system generates Leaf A-D routes locally based on received (S, G) and/or (*, G) joins, fundamentally changing the route exchange parameter set to achieve lower overhead and improved scalability
2Loss of information
If extensive S-PMSI message exchange is performed, then route information is propagated, but message exchange volume increases and processing overhead worsens
Solution Approach 1:
The patent extracts only the essential route information needed for multicast operation, removing the S-PMSI message layer entirely. By using local generation of Leaf A-D routes based on join messages, the system propagates necessary route information without the voluminous S-PMSI exchange, thus maintaining information completeness while reducing message quantity
Solution Approach 2:
The patent enables routers to self-generate route exchange information locally rather than relying on external S-PMSI messages from controllers. Each router independently generates Leaf A-D routes based on its own received join messages, eliminating the need for extensive controller-mediated message exchange while ensuring accurate route information propagation
3Extent of automation
If central controller manages all route exchange, then centralized control is maintained, but communication overhead increases and scalability is reduced
Solution Approach 1:
The patent segments the centralized route exchange function into distributed local generation capabilities. While the controller maintains overall system coordination, individual routers independently generate and manage their own Leaf A-D routes based on local join information, dividing the monolithic control function into manageable segments that scale more efficiently
Solution Approach 2:
The patent introduces a simplified intermediary mechanism where the controller provides high-level policy guidance but does not directly manage detailed route exchange. Routers use locally generated Leaf A-D routes as an intermediary mechanism to achieve multicast routing without requiring continuous controller intervention, reducing communication overhead while maintaining controlled operation
Data Source
AI summary
According to certain embodiments, a router comprises one or more processors and one or more computer-readable non-transitory storage media. The one or more computer-readable non-transitory storage media comprise instructions that, when executed by the one or more processors, cause one or more components of the router to perform operations comprising determining an occurrence of one or more network events associated with a multicast service, generating route exchange information associated with the multicast service locally by the router based on the one or more network events, and using the route exchange information locally to configure the router.