Multicast Replicator Segmentation in SD-WAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional SD-WAN architectures face challenges with insufficient bandwidth, high bandwidth costs, poor SaaS performance, complex operations, and difficulty in securing networks due to the absence of multicast performance routing and policy control features, leading to network outages and bottlenecks in multicast replicators.
Innovation Solution
Implementing multicast-based performance routing and policy control systems that dynamically select and switch between multicast replicators based on load, performance, and changing network conditions to optimize the overlay multicast tree, using protocols like OMP for signaling and IPSec tunnels for unicast traffic, and incorporating SLA-based policies for traffic engineering and QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multicast replicators are used for traffic replication in SD-WAN, then multicast traffic can be distributed to multiple receivers, but the replicators become bottlenecked and congested due to exponential bandwidth expansion
Solution Approach 1:
The patent segments the multicast replication function by introducing multiple hierarchical levels of replicators (root replicators and leaf replicators) instead of relying on a single replicator. This distribution of replication functions across multiple nodes prevents any single replicator from becoming overloaded, thereby resolving the contradiction between multicast distribution capability and network stability.
Solution Approach 2:
The patent implements dynamic selection and switching between different multicast replicators based on real-time network conditions, load metrics, and performance parameters. This dynamic adaptability allows the system to optimize multicast traffic flow and prevent congestion, maintaining both high productivity and reliability under varying network conditions.
2Device complexity
If a single multicast replicator is used for traffic replication, then the architecture is simple, but the replicator becomes overloaded and congested
Solution Approach 1:
The patent divides the single replicator function into multiple hierarchical replicators (root and leaf levels), distributing the processing load across multiple nodes. This segmentation increases processing capacity while managing complexity through a structured hierarchical approach rather than a flat single-node architecture.
Solution Approach 2:
The patent introduces a hierarchical dimension to the replicator architecture, organizing replicators into multiple levels (root and leaf) rather than using a single flat node. This dimensional change enables load distribution and improved scalability while maintaining manageable system complexity through hierarchical control.
3Adaptability or versatility
If multicast traffic is backhauled to central data center or regional hub, then Internet or SaaS traffic can be accessed, but bandwidth costs increase and application performance deteriorates
Solution Approach 1:
The patent segments the centralized backhaul approach by enabling distributed multicast replication at multiple hierarchical levels within the WAN fabric. This allows multicast traffic to be replicated and delivered locally at branch offices rather than being backhauled to central data centers, reducing bandwidth consumption and costs while maintaining cloud connectivity capabilities.
Solution Approach 2:
The patent introduces intermediate multicast replicators within the WAN fabric that act as mediators between source applications and end receivers. These intermediary replicators enable local traffic distribution, eliminating the need for all traffic to traverse back to central hubs, thereby reducing bandwidth costs and improving application performance.
4Ease of operation
If conventional unicast-based routing is used for SD-WAN, then policy routing based on flow classification is supported, but multicast performance routing and policy control features are absent
Solution Approach 1:
The patent extends unicast-based policy routing mechanisms to support multicast traffic by making the routing infrastructure multi-functional. The same hierarchical replicator structure and policy control mechanisms that manage unicast traffic are adapted to handle multicast traffic, providing universal policy-based routing and control for both unicast and multicast protocols.
Solution Approach 2:
The patent implements dynamic policy-based routing for multicast traffic that can adapt to changing network conditions, application requirements, and receiver locations. This dynamic capability allows the system to optimize multicast delivery paths and apply appropriate policies, matching the adaptability of conventional unicast routing while adding comprehensive multicast support.
Data Source
AI summary
Systems and methods provide for enabling multicast-based performance routing and policy controls for software-defined networking in a wide area network deployment including a multicast application-route policy based on sources, groups, receivers, dynamic application-route policy path selection from multicast replicators, and application-route SLA switchover across paths and multicast replicators based on SD-WAN multicast routing architecture; and dynamically selecting SD-WAN multicast replicators based on policies for replication including allowed multicast groups, geographic location, bandwidth indications, system load, and performance, and switching over dynamically across multicast replicators based real-time multicast replicator status updates.